Answer:
erm wha-
english please?
Explanation:
How does independent assortment increase genetic variation in Meiosis?
Answer:
Independent assortment produce new combinations of alleles.
Explanation:
In meiosis I, crossing over during prophase and independent assortment during anaphase creates sets of chromosomes with new combinations of alleles. Genetic variation is also introduced by random fertilization of the gametes produced by meiosis. It results in gametes that have unique combinations of chromosomes.
If this organelle was removed the cell would no longer be able to perform cellular
respiration?
Answer:
No energy would be produced for the cell since cellular respiration wouldn't occur. Proteins would not be made. All the organelles would bump into each other and they would not be held in place. ... Controls the cell's activities.
Explanation:
transport that moves materials against the concentration gradient is said to be
Answer:
It is Active Transport.
on an island there are three mice populations. Population 2 cannot contact populations 1 and 3. What name is given to this situation?
Answer:
Isolation
Explanation:
On a island, there are three mice population in which one population cannot contact other populations. This situation is an example of allopatric speciation.
What is Allopatric speciation?Allopatric speciation is also referred to as geographic speciation. It is also called vicariant speciation. Allopatric speciation is a mode of speciation which occurs when the biological populations become geographically isolated from each other to an extent that it prevents or interferes with the normal gene flow in a population.
There are several factors which are required for the allopatric speciation to take place such as isolation of a population, time, and natural selection in an environment. Earthquakes, floods, and migration all are the ways through which a group of individuals of the same species can become isolated.
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In which organelle would the above events most likely occur?
A. Chloroplast
B. Mitochondria
C. Nucleus
D. Ribosome
PLS HELP!!
Answer:
Mitochondria
Explanation:
The organelle in which the above events most likely occur is known as the Chloroplast. Thus, the correct option for this question is A.
What is an Organelle?An organelle may be defined as a type of tiny organ or a subcellular structure that has significantly one or more specific functions in order to perform in the cell which is essential for the survival of living organisms.
The events that are demonstrated in the picture are known as the light reaction and dark reaction of photosynthesis. The light reaction of photosynthesis occurs in the thylakoid membrane of the chloroplast while the dark reaction of photosynthesis occurs in the stroma of the chloroplast.
Therefore, the chloroplast is an organelle in which the above events most likely occur. Thus, the correct option for this question is A.
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What process is used to link amino acids together?
Answer:
condensation
Explanation:
Amino acids consist of carbon, oxygen, hydrogen, and nitrogen. The linking of two amino acids entails the release of a water molecule. Hence, the process that links two amino acids together is called condensation. The condensation reaction is also called a dehydration reaction.
Answer:
Amino acids consist of carbon, oxygen, hydrogen, and nitrogen. The linking of two amino acids entails the release of a water molecule. Hence, the process that links two amino acids together is called condensation.
which source of calories causes the body to expend the most energy during digestion?
The consumption of energy during digestion is known as the thermic effect of food.
Consuming food is how we get the energy needed to sustain the basic functions of our organisms. Digesting this food, however, also takes up energy. In fact, about 10% of the energy we expend daily is allocated towards the digestion and storage of food and nutrients. This is known as the thermic effect of food.
On average, the food with the highest thermic effect is that of vegetables and fruit with high water compositions. This, however, falls a bit out of the scope of the question given that these foods are often very low in calories. The food that is high in calories and has a high thermic effect is protein. On average, proteins consume 20-30% more energy to digest than other sources of calories.
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BIOLOGY HELP!!! NO LINKS PLEASE!!!
1. Robert Hooke first observed cork cells in 1665 Which statement describes the flaw in Robert Hookes initial conclusion about his observations?
A.) Hooke observed dead cells and concluded that cells are empty structures.
B.) Hooke observed box shaped cells and concluded that all cells are the same shape
C.) Hooke observed structures within the cells and concluded that all cells contain the same structures
D.) Hooke observed similarly sized cells and concluded that all cells are the same size
2. What would happen if the cell membrane of a cell was damaged?
A.) Energy production within the cell would stop
B.) The cell could no longer make proteins
C.) The cell could no longer perform photosynthesis
D.) Cytoplasm and other molecules could leak out of the cell
3. What could happen to a cell if it’s ribosomes did not function properly?
A.) The cell could not convert light energy into sugars
B.) The cell could not send or receive chemical signals
C.) The cell could not synthesize proteins
D.) The cell could not store energy
4. Where do most cellular activities occur?
A.) The endoplasmic reticulum
B.) The mitochondria
C.) The nucleus
D.) The cytoplasm
5. Why are muscle cells packed with mitochondria?
A.) Mitochondria provide important structural support to maintain muscle cell shape
B.) Muscle cells use a lot of ATP generated by mitochondria
C.) Muscle cells relax and contract depending on the number of mitochondria present in the cell
D.) Muscle cells require large numbers of proteins produced by mitochondria
PLEASE HELP!!! Again no links please!
Answer:
1)A
2)D
3)C
5)B
I hope this helps:)
Answer:
1.) Hooke observed dead cells and concluded that cells are empty structures.
2.) Cytoplasm and other molecules could leak out of the cell.
3.) The cell could not synthesize proteins.
4.) The cytoplasm
5.) Muscle cells use a lot of ATP generated by mitochondria.
Explanation:
I took the test and all of these are correct! :D Hope this helps people i the future!
What is the best microscope to get a detailed view of the parts inside of a preserved plant cell?
Transmission electron microscope
Scanning electron microscope
Compound light microscope
Dissecting microscope
Answer:
transmission electron microscope
Explanation:
How does water affect Earth’s physical features?
Answer:
Water moving across the earth in streams and rivers pushes along soil and breaks down pieces of rock in a process called erosion. The moving water carries away rock and soil from some areas and deposits them in other areas, creating new landforms or changing the course of a stream or river.
Explanation:
A molecules is defined as what?
Answer:
Molecule, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance. Several methods of representing a molecule's structure.
Explanation:
I hope you have a nice day and please mark me bye(:
how many photosystems are there in photosynthesis?
Answer:
2
Explanation:
There are two kinds of photosystems: photosystem I (PSI) and photosystem II (PSII) (Fig. 3.3).
Answer:
Two
Explanation:
wa i afunwhich meal would provide he most energy as well as as the material needed to build muscle
Answer:
Whichever meal is the highest in protein.
Explanation:
Protein keeps you feeling fuller for longer, gives you long term energy and it also helps build muscle.
what’s the correct choice?
help pls
bio
Answer:
ig (to the genotype of an individual with a recessive phenotype) but in general its done to find the genotype of individual and check whether they are dominant or recessive
Answer:
i think first option please follow me we should help each other
Give advantages of endothermic animals
Answer:
The advantages of endothermy are well known: the ability to occupy thermal niches that exclude many ectothermic vertebrates, a high degree of thermal independence from environmental temperature, high muscular power output and sustained levels of activity, to name but a few.
The major advantage of endothermy over ectothermy is decreased vulnerability to fluctuations in external temperature. Regardless of location (and hence external temperature), endothermy maintains a constant core temperature for optimum enzyme activity.
An Irish or white potato is a stem, but a sweet potato is a root. How can you tell?
Answer:
All stems have nodes, internodes, and axillary buds; these features distinguish them from roots and leaves, which do not have them. In Irish or white potato plants, several internodes at the tips of stolons become tubers.
Explanation:
The plasma membrane
a. allows all substances to pass into and
out of the cell
b. prevents all substances from passing
into and out of the cell
c. is composed mainly of a protein bilayer.
d. is composed mainly of a lipid bilayer.
those who operate fisheries need to be concerned about all the following except
A. Disease
B. Nutrition
C. Water Quality
D. Natural Predators
Answer:
D. Natural Predators.
Based on the graphs shown, what would you conclude about the conditions under which enzymes function in cells?
A
Enzymes are most effective at a particular pH and temperature but can function over a range of pH and temperature.
B
С
Enzymes do not have a specific pH or temperature at which they are most effective but function optimally over a range of pH and temperature.
Enzymes work equally well at the low and high ends of their temperature range but reaction rate drops quickly at the high end of their pH range
Enzymes only function at a specific pH and temperature and cannot function over a range of pH or temperature.
D
atoms determine the number of valence electrons determine the stability of the atom based on above
Enzymes are the bio-catalysts. Their presence can increase the rate of a reaction. Enzymes are most effective at a particular pH and temperature but can also function over a range of pH and temperature. Thus, correct option is A.
What are Enzymes?Enzymes are the biocatalysts which are responsible for increasing the rate of a chemical reaction. The enzymes increase the rate of a reaction by decreasing the activation energy which is required by the reactant molecules to collide and form products.
Enzymes are found to function over a range of pH, temperature, and solvents. Enzymes work over a range of different conditions. The value of pH and temperature at which enzymes show highest activity is called optimum condition. Below and above this point, enzymes function but the activity will be lesser than that in the optimum condition.
Therefore, A is the correct option. Enzymes are most effective at optimum condition of pH and temperature.
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what is the first layer of hair that is cut by scissors when receiving a hair cut?
Answer: the guide?
Explanation:
Cuticle is the first layer of hair that is cut by scissors when receiving a hair cut.
What do you mean by cuticle?The cuticle is a layer of clear skin located along the bottom edge of your finger or toe. This area is known as the nail bed. The cuticle function is to protect new nails from bacteria when they grow out from the nail root.
A cuticle is a hydrophobic boundary layer on the outer surface of primary aerial organs. Its presence is a common feature of all vascular and some non-vascular plants.
The cuticle plays an important role in nail health. They provide protection for the tissue that grows new cells to build nails. As you know, your nails are constantly growing, that's why you have to keep them manicured.
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Which of the following statements are part of Koch’s Postulates? Check all that apply.
A - The disease-causing microorganism must be present in at least half of the cases of disease.
B -The microorganism can be isolated and grown in a pure culture.
C - The microorganism from the pure culture will cause the disease in at least 80% of healthy organisms.
D - A re-isolated microorganism may evolve into a different species than the original.
Answer:
B
Explanation:
'The microorganism can be isolated and grown in a pure culture', is the only correct answer.
The statement that a microorganism can be isolated and grown in a pure culture is a part of Koch’s Postulates.
What are microorganisms?
A microorganism, or microbe is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells.
The possible existence of unseen microbial life was suspected from ancient times, such as in Jain scriptures from sixth century BC India. The scientific study of microorganisms began with their observation under the microscope in the 1670s by Anton van Leeuwenhoek. In the 1850s, Louis Pasteur found that microorganisms caused food spoilage, debunking the theory of spontaneous generation. In the 1880s, Robert Koch discovered that microorganisms caused the diseases tuberculosis, cholera, diphtheria, and anthrax.
Because microorganisms include most unicellular organisms from all three domains of life they can be extremely diverse. Two of the three domains, Archaea and Bacteria, only contain microorganisms.
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at the end of glycolysis the carbons of glucose are converted to
Which of the following is NOT
how mitochondria could have
become part of the eukaryotic
cells?
A. It may have entered as a parasite.
B. It may have been engulfed.
C. It may have entered through photosynthesis.
Please help
Answer:
Its C
Explanation:
Does the amount of energy from the food eaten (Kcal) by each organism equal the amount of energy used by each organism? Support your answer by showing your calculations. (Show your work > math icon)
Answer:
Explanation:
This continues on, all the way up to the top of the food chain. About 50% of the energy (possibly as much as 90%) in food is lost at each trophic level when an organism is eaten, so it is less efficient to be a higher order consumer than a primary consumer.
what kinds of evidence from fossils might help determine whether dinosaurs were ectotherms or endotherms?
What is a chemical property? Give 2 examples.
Answer:
Examples of chemical properties include flammability, toxicity, acidity, reactivity (many types), and heat of combustion. Iron, for example, combines with oxygen in the presence of water to form rust; chromium does not oxidize
Explanation:
8th grade science notes
the reticular layer of the dermis consists primarily of
Answer:
The reticular layer of the dermis (RD) consists of dense irregular connective tissue, which differs from the papillary layer (PD), which is made up of mainly loose connective tissue (note the difference in the number of cells).
Explanation:
Hope this helps...
What is the rarest bird in the world currently?
Answer:
I believe it is the Bahama Nuthatch. But, I might be wrong, for it is a guess. Please let me know if I am correct or if I am wrong.
Answer:Madagascar Pochards
Explanation: The Madagascar Pochard, or sometimes known as the Madagascan pochard, is a very rare diving duck of the genus Aythya. Thought to be extinct in the late 1990s, individuals of the species were recovered in 2006 near Bemanevika, Madagascar, at Lake Matsaborimena. The species is only found in Madagascar's interior marshes, where it is endemic. The sole wild populations are currently found in Lake Sofia and Lake Matsaborimena. Meanwhile, there are slightly over 50 pochards at Bemanevika.
clusters of chlorophyll and accessory pigments are called ________.
Answer:
Photosystems
Explanation:
In all photosynthetic organisms studied to date, except one class of photosynthetic bacteria, light is captured by clusters of chlorophyll and accessory pigment molecules, which together are called photosystems.
Hope this helps :)
Why do volcanoes usually form at plate boundaries?
Answer:
When plates move away from each other at divergent plate boundaries, interesting things happen. For example, when plates move apart, molten rock from the Earth's core ascends and forms new crust. ... This molten rock can rise up to the surface, forming a volcano, and causing volcanic eruptions.
