The epithelium is a kind of bodily tissue that forms the coating on all of your body's internal and exterior surfaces, lines body cavities and hollow organs, and is the main tissue in glands.
Depending on where it is in your body, epithelial tissue has a range of roles, including protection, secretion, and absorption. The organs in your body are made up of four different types of tissue:
Epithelial.Connective.Muscular.Nervous.Epithelial cells make up epithelial tissue. Depending on where they are in your body and what tasks they perform, the cells might have varied forms and organised in a single layer or numerous layers.
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due to its hydrophilic channels, porins allow the passage of group of answer choices small water-soluble nutrients. sugars. amino acids. inorganic ions. all of the above.
Hydrophilic channels the passage of small macromolecules, such as glucose or maltose amongst others.
Porins also possess an internal hydrophilic channel or pore that permits the passage of small macromolecules, such as glucose or maltose amongst others, from the external environment to the cell interior.
Channel proteins can aid in the facilitated diffusion of substances by forming a hydrophilic passage through the plasma membrane through which polar and charged substances can pass.the bilayer has a hydrophobic core that prevents the passage of polar molecules while allowing the relatively free diffusion of non-polar molecules. This is important because it allows the bilayer to select which molecules it will allow into and out of the cell.
The molecules or proteins are considered hydrophilic. These molecules are also referred to as water-loving molecules. There is an association of the proteins with the membrane of the cell. The location of a protein is in the lipid bilayer.
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the two most obvious physical changes seen in early childhood include growth in height and an increase in ____
The two most obvious physical changes seen in early childhood include growth in height and an increase in weight.
During early childhood, which is typically defined as the period between ages 2 and 6, children experience a rapid growth phase. This growth phase is characterized by an increase in height and weight, as well as other physical changes such as the development of fine motor skills and improved coordination. In terms of height, children in early childhood typically grow at a rate of around 2-3 inches per year. This growth is largely due to an increase in bone length and density, as well as changes in the musculature and connective tissue. In terms of weight, children in early childhood typically gain an average of 4-5 pounds per year. This weight gain is largely due to an increase in muscle mass, as well as an increase in body fat, which is important for energy storage and insulation. These physical changes are important for a child's overall development, and are closely linked to other aspects of growth and development such as cognitive and emotional development. By monitoring a child's growth and development, parents and caregivers can help to ensure that the child is healthy and developing at an appropriate pace.
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Classify each feature as describing euchromatin, heterochromatin; Or both. Euchromatin Both Heterochromatin A) is a state of DNA organization B) inaccessible to transcription machinery C) found in prokaryotes D) is accessible to transcription machincry E) is the major state of the human chromosomc F) is tightly packed G) is looscly packed H) is the major slate of most genes
Based on the given features, the classification of euchromatin, heterochromatin, or both is: is a state of DNA organization , B) inaccessible to transcription machinery , C) found in prokaryotes: Euchromatin is not found in prokaryotes
D) is accessible to transcription machinery: Euchromatin is accessible to transcription machinery.
E) is the major state of the human chromosome: Euchromatin is the major state of the human chromosome.
F) is tightly packed: Heterochromatin is tightly packed.
G) is loosely packed: Euchromatin is loosely packed.
H) is the major state of most genes: Euchromatin is the major state of most genes.
In summary, euchromatin and heterochromatin are both states of DNA organization, but they differ in their accessibility to transcription machinery and their level of compaction. Euchromatin is loosely packed and accessible to transcription machinery, making it the major state of most genes. Heterochromatin, on the other hand, is tightly packed and inaccessible to transcription machinery, serving a role in gene silencing and chromatin condensation.
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the double coiled, staircase shape of dna is called a
The double coiled staircase shape of DNA is called a double helix .
The DNA double helix biopolymer of nucleic acid is held together by nucleotides which base pair together. In B-DNA, the most common double helical structure found in nature, the double helix is right-handed with about 10–10.5 base pairs per turn. Each molecule of DNA is a double helix formed from two complementary strands of nucleotides held together by hydrogen bonds between G-C and A-T base pairs. Duplication of the genetic information occurs by the use of one DNA strand as a template for formation of a complementary strand . DNA is a double helix formed by base pairs attached to a sugar-phosphate backbone. The double helix of DNA has these features: It contains two polynucleotide strands wound around each other. The backbone of each consists of alternating deoxyribose and phosphate groups. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure. DNA in each human cell is packaged into 46 chromosomes arranged into 23 pairs.
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What is the definition of Active transport?
Active transport entails the use of energy to transfer molecules across such a cell membrane from one area with a low concentration to another.
What are active and passive modes of transport?With the use of energies in the form of ATP, active transport transports atoms and ions from a lower concentration to a higher concentration. In contrast hand, passively transport does not require any energy to move molecules or ions from one concentration to another.
What is Toppr active transport?Moving molecules all over a cell membrane against their gradient of concentration, from a low to a high concentration, is known as active transport.
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What type of molecule did you make?
AUG GGU UGU UAA
AUG GGU UGU UAA is an amino acid sequence, which further forms proteins.
What are amino acids?Proteins are made up of substances called amino acids. Proteins and amino acids are the components of life. Amino acids are the byproducts of the digestion or breakdown of proteins.
Amino acids are used by the human body to create proteins that aid in dissecting food.
There are mainly 20 types of amino acids. 10 are essential amino acids, while 10 are non-essential amino acids. Our body synthesizes non-essential amino acids, while we have to include essential amino acids in our diet.
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what defect causes pituitary dwarfism? view available hint(s)for part a what defect causes pituitary dwarfism? neurodegeneration one defective allele lack of growth hormone lack of a pituitary gland
The pituitary gland is destroyed by a malignant, degenerative, or aberrant process, which results in pituitary dwarfism. As a result, the production of additional pituitary hormones such growth hormone (GH), thyroid-stimulating hormone (TSH), adrenocorticotropic hormone (ACTH), luteinizing hormone (LH), and follicle-stimulating hormone (FSH) may also decrease.
The most common and easily recognisable form of dwarfism in humans is achondroplasia, a congenital disorder in which the limbs are short (in around 70% of cases). In most other situations, a shortage of growth hormone is to blame. The type of treatment depends on the underlying cause. Patients with hereditary disorders occasionally need physical therapy or surgery. Hormone imbalances can also be treated with growth hormone therapy prior to the child's growth plates merging. Custom-made furniture is regularly used as personal accommodations by people of modest size. Many support groups provide services to assist people in coping with any potential discrimination they may experience.
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this is the smallest unit of life and can grow, reproduce, and perform certain basic functions. What is it?
The smallest unit of life, cells have the ability to grow, reproduce, and carry out some essential tasks.
Describe a cell.A cell is a primary membrane-bound organism in biology that includes the elements of life and serves as the basis for all other living things. A single cell is sometimes a full organism unto itself, just like in the case of bacteria or yeast. Some cells develop specialised jobs as they grow.
These cells lay the foundation for enormous multicellular organisms like humans and other animals, along with other specialised cells. Cells, although much bigger than atoms, remain quite small. The tiniest known cells are members of the bacterial class known as mycoplasmas.
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According to the concept of punctuated equilibrium, the "sudden" appearance of a new species in the fossil record means that a. the species is now extinct. speciation occurred instantaneously. b. speciation occurred in one generation. c. speciation occurred rapidly in geologic time. d. the species will consequently have a relatively short
The correct answer is C. speciation occurred quickly in geologic time.
According to the notion of punctuated equilibrium, the process of species development takes place in brief bursts, followed by stable intervals.
Contrary to the conventional theory of evolution, which contends that species evolve gradually over extended periods of time, this is the case. In accordance with this view, new species unexpectedly arise in the fossil record and are then preserved.
Punctuated equilibrium does not, then, imply that speciation happens within a single generation or that the species is already gone. Instead, it implies that diversification happens quickly across geologic time and that the questioned species could still exist.
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What is the function of epidermal ridges?
According to some theories, finger pads' epidermal ridges drain excess water, avoid blistering, and encourage interlocking when they come into touch with rough surfaces. They also increase tactile sensitivity.
What are epidermal ridges formed?The epidermis conforms to the dermal papillae that lie beneath the epidermis to generate the epidermal ridges. As the dermal surface becomes uneven, the epidermis' basal cells contribute to the development of ridges. Ridges are formed by this process. Our fingerprints are anatomical features of the thick skin's epidermis called epidermal ridges. The skin's oil reacts with a surface when the epidermal ridges precisely come into touch with it, resulting in the fingerprint.
What distinguishes dermal papillae from epidermal ridges?Dermal connective tissue extends through the epidermal layer to form dermal papillae. The epidermis is carried over into dermal layer by rete ridges. The palms and hands' thick skin have an especially noticeable undulating pattern. The reticular and papillary dermis are difficult to distinguish from one another. Fingerprints develop in a developing fetus where the papillae of an underneath dermal layer (papillary layer), which is where the cells of a basal layer of the epidermis meet. This is where the ridges on the fingers that you associate with fingerprints develop.
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differences in these bacterial structures can influence which antibiotics bacteria are susceptible to.
-Gram-positive bacteria,
-Gram-negative bacteria,
-Pathogen bacteria
-antibiotic
Differences in these bacterial structures can influence which antibiotics bacteria are susceptible to, Option A) Gram-positive bacteria.
Changes in bacterial architecture are caused by both evolutionary and cell wall structural differences.
In contrast, the thick, porous peptidoglycan coating within Gram-positive microorganism cell walls allows antibiotics to more easily infiltrate the cell and/or interact with the peptidoglycan itself. It is crucial because knowing what proteins and enzymes are present in the bacterial cell allows you to determine what needs to be produced to prevent the creation of those enzymes and proteins. Antimicrobial drugs used to dispose of different microbial systems and types of microbial cells have various degrees of resistance. Microorganisms with endospores are the most resistant.
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what is the name of the differentiation technique that causes bacteria to turn either pink or purple?
Gram staining is a method frequently used to distinguish between two sizable groups of bacteria based on the distinct components of their cell walls. By staining these cells red or violet, the Gram stain method distinguishes between Gram positive and Gram negative groupings.
Although the microscope is a crucial instrument in microbiology, there are restrictions when it comes to viewing cells in general and bacterial cells in particular through one. Resolution and contrast are two of the most crucial issues. Since most bacterial cells are already very close to the resolution threshold of most light microscopes, resolution is a limitation that we can't do much about. But contrast can be enhanced by switching to a new kind of optical system, like phase contrast or differential interference contrast.
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The separation of the Archaebacteria into a separate domain indicatesa. That these organisms are very different from eubacteria and from eukaryotesb. That orgasims should never be classfied according to how they appera (morphological characterisitics)c. That early taxonomist rushed to classify them without closely examining themd. That optical viewing techniques have greatly improved so that we can better view these microorganismse. None of that above
The separation of Archaebacteria into different separate domains indicates that they are different from Eubacteria. option a)
Archaebacteria are known to be the oldest living forms on the Earth. They have the potential to survive under very harsh conditions like volcanic vents and at the bottom of the sea and are therefore also called as extremophiles.
Archaebacteria are obligate or facultative anaerobes, and this is the reason that they can flourish in the absence of oxygen and that therefore undergoes methanogenesis.
The archaebacteria are those organisms which have certain properties which are not common to the organisms placed in the other kingdoms. Archaebacteria are methanogens which can produce methane gas. The DNA of these organisms is generally present in a relaxed state or in a positively coiled manner. The cell wall of these organisms do not contains lipids, peptidoglycan, etc. The organisms are studied and differentiated on the basis of the ribosomal gene diversity in these organisms.
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Full Question: The separation of the Archaebacteria into a separate domain indicates
a. That these organisms are very different from eubacteria and from eukaryotes
b. That orgasims should never be classfied according to how they appera (morphological characterisitics)
c. That early taxonomist rushed to classify them without closely examining them
d. That optical viewing techniques have greatly improved so that we can better view these microorganisms
e. None of that above
what is the microscopic appearance of rbcs when stained with a romanowsky stain?
The microscopic appearance of red blood cells (RBCs) when stained with a Romanowsky stain is typically described as pink to red and measures 6 to 8 µm in diameter with a zone of pallor that occupies around one-third of their center.
The Romanowsky stain is a type of staining technique that is commonly used in the field of cytology and hematology. It is used to differentiate and identify different types of cells, particularly in blood smears and bone marrow samples. The Romanowsky stain is composed of a mixture of eosin and methylene blue dyes, which stain different cellular components in varying shades of pink, purple, and blue. This allows for the identification of different types of blood cells, such as red blood cells, white blood cells, and platelets, as well as the detection of any abnormalities or diseases.
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which is the only reaction in the citric acid cycle that produces atp by substrate-level phosphorylation?
Oxidative phosphorylation is the only reaction in the citric acid cycle that produces ATP by substrate-level phosphorylation.
The citric acid cycle (CAC), often referred to as the Krebs cycle or the TCA cycle, is a sequence of chemical reactions that oxidize acetyl-CoA, which is obtained from carbs, lipids, and proteins, to release stored energy. Instead of fermenting, organisms that respire use the Krebs cycle to produce energy, whether through anaerobic or aerobic respiration. The cycle also supplies precursors of certain amino acids and NADH, a reducing agent that is employed in a variety of other processes.
The electron transport chain is where NADH and FADH₂ are transferred during oxidative phosphorylation, where their high-energy electrons will ultimately fuel the synthesis of ATP.
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What cell organelle is the site of aerobic cell respiration?
Ochloroplast
nucleus
ribosome
mitochondria
Answer:Mitochondria
Explanation:The Mitochondria is known as the powerhouse of the cell and it is the site of aerobic cell respiration.
Answer: Mitochondria is the site of aerobic cell respiration.
Explanation: Aerobic respiration is the biological process in which food glucose is converted into energy in the presence of oxygen. This type of respiration is common in most plants, animals, birds, humans, and other mammals.
Mitochondria are organelles that have membranes specialized for aerobic respiration. Oxidation of chemical substances takes place in mitochondria. It absorbs oxygen and releases energy and carbon dioxide. So, that is why respiration takes place in Mitochondria.
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Most bacterial cells are encased by a strong cell wall composed of ___________________ which is a carbohydrate matrix cross-linked by polypeptides.
Most bacterial cells are encased by a strong cell wall composed of peptidoglycan, which is a carbohydrate matrix cross-linked by polypeptides.
What is the role of peptidoglycan in bacterial cell?Peptidoglycan provides strength and rigidity to the bacterial cell wall and also helps to protect the cell from osmotic stress. Peptidoglycan is a critical component of the cell wall in bacteria, providing structural support and protection against osmotic stress. The peptidoglycan layer forms a mesh-like structure that encases the bacterial cell, providing rigidity and shape. The layer also helps to protect the cell from bursting due to changes in osmotic pressure, such as when the concentration of solutes is higher outside the cell than inside. Additionally, the peptidoglycan layer is a key target for antibiotics, which can interfere with its synthesis and cause bacterial cell death.
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1.what observations led mendel to conclude that traits were inherited as discrete particles from each parent?
The observations that led Mendel to conclude that traits were inherited as discrete particles from each parent are, that trait were inherited as dominant and recessive, which led him to propose the conclusion that they were particles inherited from each parent.
Mendel did studies on inherited genes that lead him to accept some traits were dominant and recessive. Through this, he found that some genes had ratios of being generated, relating to the maternal and paternal traits they have.
This observation states that traits are inherited as dominant and recessive, and not all blended, which made him to propose the conclusion that they were particles inherited from each parent.
As per Mendelian inheritance, all the traits which are present in an offspring are determined by the specific which exist in alternate forms called as alleles.
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substance or material that causes pollution.
Answer:
lead,carbon monoxide,nitrogen oxides,ground levels,particle pollution
What does deliver oxygenated blood to the body's cells?
Blood that is oxygenated and other nutrients are delivered to body cells by the circulatory system.
The heart, arteries, veins, and capillaries are all parts of the circulatory system, which is a network of blood vessels. The arteries, which divide into smaller arterioles and finally into capillaries, carry oxygenated blood from the heart to the body's tissues and organs. The tiniest blood vessels, called capillaries, are in charge of transferring nutrients, waste products, and oxygen from the blood to the body's cells. Whilst also waste materials, such as carbon dioxide, disperse from the tissues into the capillaries, oxygen and nutrients diffuse from the capillaries into to the surrounding structures. The blood returns to the coronary thru the veins, merging into larger venous system and then into the heart after swapping materials with the cells.
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If human activity continues at its present rate, what will probably happen to the levels of carbon dioxide and the other gases?
If human activity continues at its present rate, the levels of carbon dioxide and other gases increases.
What are the effects of human activities on the environment?The effects of human activities on land and in the sea can have a significant impact on ecosystems.
Among the various issues that ecosystems face include climate change, ocean acidification, habitat loss, eutrophication, stormwater runoff, air pollution, pollutants, and invasive species.
Therefore, If human activity continues at its present rate, the levels of carbon dioxide and other gases increases.
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A cell which normally lives in a 10% saltwater solution was moved into another solution. Which of these solutions would cause the cell to increase in size at the greatest rate?
a.10%
b.20%
c.5%
d.0%
so I know the answer is 0% but I don't understand why it is 0% can you explain please
A cell will increase in size in a solution at the greatest rate of 0%, option D.
Why does cell increase in a solution?A cell's ability to take in or lose water is regulated by the concentration of solutes (such as salts) inside and outside the cell. If the concentration of solutes is higher outside the cell than inside, water will move into the cell by osmosis, causing the cell to increase in size. If the concentration of solutes is higher inside the cell than outside, water will move out of the cell, causing the cell to decrease in size or even burst.
In this case, the cell was originally in a 10% saltwater solution, meaning there was 10% concentration of solutes inside the cell. When the cell was moved into a 0% solution, the concentration of solutes outside the cell was much lower than inside the cell, causing water to move into the cell rapidly by osmosis, causing the cell to increase in size at the greatest rate.
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Imagine that a volcano starts to emit a lot of gas and has an increase in shallow earthquakes, indicating that magma may be rising towards the surface. A couple of days later the activity ceases before an eruption occurs. Which of the following could explain why the activity shut off?
A)The rising magma encountered a very strong rock layer.
B)There was probably a large landslide on the volcano that increased the lithostatic pressure?
C)The number of bubbles in the magma increased and stopped the magma from rising.
D)The magma encountered water which made it stop erupting.
Imagine that a volcano starts to emit a lot of gas and has an increase in shallow earthquakes, indicating that magma may be rising towards the surface. A couple of days later the activity ceases before an eruption occurs.
The activity that explains the scenario above is the magma encountered water which made it stop erupting.
Option D is correct.
What is a volcano?A volcano is described as a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface
From the scenario above, when magma encounters water, it may bring about an explosive reaction, leading to the rapid release of pressure, causing the magma to stop rising and erupting.
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Consider a radio wave with a frequency of 75 x 106 s1. What is the wavelength, in meters of this wave? Your answer should have 2 significant figures.
Answer:
4.0 meters
Explanation:
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96 The diagram shows how the volume of the left ventricle changes over a time period of 1.3 seconds.
A
Volume of
left ventricle
C
d
a
bi
ii
0
B
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6
Time in seconds
How many complete heart beats are shown in the diagram?
Use the graph to calculate how long one heart beat takes. Show your working.
Use your answer to bi to calculate the heart rate. Show your working.
96 The diagram shows how the volume of the left ventricle changes over a time period of 1.3 seconds.
A
Volume of
left ventricle
C
d
a
bi
ii
0
B
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6
Time in seconds
How many complete heart beats are shown in the diagram?
Use the graph to calculate how long one heart beat takes. Show your working.
Use your answer to bi to calculate the heart rate. This is the answer
calculate the purification of the target protein when there is a 30% decrease in activity and a 55% decrease in total protein after centrifugation.
The purification of the target protein when there is a 30% decrease in activity and a 55% decrease in total protein after centrifugation is 1.6-fold.
Total activity is the total number of enzyme activity units (U) recovered at each step (and present in samples from that step). Proteins are lost at various steps and are also denatured during manipulation, so they are usually depleted during purification. The goal of any protein purification process is to obtain a highly pure, stable and active protein for subsequent experiments. The exact nature of the downstream application will dictate the level of purity that must be achieved, compatible buffer/storage conditions, and required quality control testing.
To extract protein from cells containing protein, the cells must be separated using centrifugation. Centrifugation with varied densities of medium, in particular, can aid in the separation of proteins produced in specific cells. Generally, the first step after forming a crude extract is simple filtration or centrifugation to remove bulky material. Centrifugation is the process of using a centrifuge to sediment a mixture using centrifugal force.
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which organelle receives proteins from the endoplasmic reticulum and glycosylates them before sorting the proteins to other organelles?
The organelle that receives proteins from the endoplasmic reticulum and glycosylates them before sorting the proteins into other organelles is the Golgi apparatus.
Proteins obtained from the endoplasmic reticulum are processed and sorted in the Golgi apparatus, or Golgi complex, where they are eventually transported to lysosomes, the plasma membrane, or secretion. The extensive range of cellular components that go down the secretory pathway is thus processed by the Golgi apparatus.
The Golgi apparatus, or cisternae, is a group of connected, flattened membrane-enclosed disks that originate from vesicular clusters that branch off the endoplasmic reticulum and are found in the majority of eukaryotes.
The Golgi apparatus' composition and purpose are closely related. Enzymes are distributed differently across each stack, enabling cargo proteins to be processed gradually as they go from the cisternae to the trans-Golgi face. Only in the vicinity of the Golgi stacks' membrane surfaces, where the enzymes are attached, do enzymatic processes take place.
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a dome shaped surface that articulates with the head of the radius.
Capitulum is a dome shaped surface that articulates with the head of the radius.
A short, dense cluster of flowers without stalks that is immediately joined at the base is referred to as a capitulum. Cauliflower, broccoli, and clovers are a few common examples of capitula. A floret is any one of the individual flowers that make up a cluster. The florets of the capitulum can be of different sizes and can take on a variety of shapes.
As is sometimes the case with particular sunflower cultivars, some florets can get rather enormous. Botanists claim that the capitulum is a particular kind of compound inflorescence that is frequently observed in the Asteraceae family. The number of capitula species is around 22,000! The thousands of flowers that make up thistles, daisies, dandelion, and sunflowers are gathered together to create a single organism.
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The actual question is:
Fill in the blanks,
_____________ is a dome shaped surface that articulates with the head of the radius.
What are two ways lysosomes can be activated?
Lysosomes can be activated by joining forces with an ageing organelle and a phagocytosed food vesicle.
Describe lysosomes.A lysosome is a membrane-bound organ system of a cell that includes digesting enzymes. Many biological processes involve lysosomes. They disassemble extra or damaged cell components. They could be applied to eliminate invading germs and viruses. Lysosomes can assist a cell in self-destruction through a process known as programmed cell death, or apoptosis, if the damage is irreparable.
The lysosome is an one kind of acidic organelle there at moment. It must therefore be shielded from the interior of the rest of the cell. Thus, the digestive enzymes that must be kept in an acidic, low-pH environment are housed in a compartment with a membrane surrounding it. These hydrolytic enzymes break large molecules into smaller ones.
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an item contaminated with blood, body fluids, secretions, or excretions that may be dangerous or harmful is:
Items contaminated with blood, bodily fluids, excretions, or secretions are referred to as "biohazardous waste"; the words "bio" and "hazardous" denote risk or harm.
Waste contaminated with potentially infectious agents or other substances that are judged to be a concern to the public health or the environment is referred to as biohazardous waste, sometimes known as infectious waste (such as blood, body fluids, and human cell lines). Biological agents Biological wastes such as spores, viruses, bacteria, or live, attenuated vaccinations. Waste contaminated with infectious human or animal excrement, exudates, or secretions Bench paper, paper towels, Kim wipes, and any other products contaminated with biohazardous substances. Biohazardous liquid waste Animal or human blood Animal or human blood components physiological fluids or semi-liquid substances from humans or animals, Anatomical samples of humans if exposed to biohazardous materials, leads to many diseases.
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