when does crossing over occur? how many chromatids are involved? how many homologous chromosomes?
Answer:
The normal human karyotype is made up of 46 chromosomes: ... The 2 sister chromatids are linked mainly by a paracentric heterochromatin ...
Explanation:
Students created note cards comparing characteristics of eukaryotic and prokaryotic cells.
Which set of note cards most accurately compares these cells?
Given what we know about Eukaryotic and Prokaryotic cells, we can confirm that the note card labeled "F" is the one that best compares these two cell types.
Eukaryotic and Prokaryotic cells have many differences to discuss, the ones mentioned in note cards, however, are:
The presence of membranes surrounding organelleThe location of the DNA for each cellProkaryotic cells are cells that lack any organelle or nucleus. This is due to the absence of membranes, which are needed to maintain the structure of the organelle. Due to the lack of membranes and therefore of a nucleus, the DNA of these cells can be found floating in the cytoplasm. Table F is the only one that accurately represents these traits.
Eukaryotic cells, on the other hand, are those that do possess membranes. The presence of membranes allows the eukaryotic cells to have a nucleus that can contain their DNA. This cell type is that of most multicellular organisms, whist the prokaryotic are known most commonly as bacteria. Once again, table F is the one that best represents this data.
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Identify the mood in the following sentences:
Shelly lightly skipped across the playground and found the brightest yellow flower; her smile beamed with glee.
A. Hesitant
B. Hungry
C. Joyous
Compare and contrast the skeletal body system with immune system
Abstract
In the last two decades, numerous researchers have focused on elucidating the relationship between the skeletal and immune systems with respect to their regulatory mechanisms. It has now become clear that osteoclasts are derived from the same myeloid precursor cells that can differentiate into macrophages and myeloid dendritic cells. In addition, bone and immune cells coexist in the common microenvironment of the bone marrow and are thus influenced by similar mediators. Discovery of a common regulatory mechanism via the receptor activator of nuclear factor kappa-B ligand (RANKL)–receptor activator of NF-κB (RANK)–osteoprotegerin (OPG) axis in both the bone and immune system has not only increased understanding of the fundamental processes of bone homeostasis but has further crystalized understanding of the definitive regulatory correlation between bone and immunity. Moreover, many of the soluble mediators produced by immune cells, including cytokines, chemokines, and growth factors, regulate the activities of osteoclasts and osteoblasts. This increased recognition of the complex interactions between the immune system and bone has led to the development of the interdisciplinary field of osteoimmunology. In this review, we summarize the characteristics of bone cells and the soluble mediators responsible for crosstalk between the skeletal and immune systems. A more complete appreciation of the interactions between immune and bone cells should lead to better therapeutic strategies for diseases that affect either or both systems.
How do cells
Aquire the materials.
and
energy
necessssary
to
sustain cire?
Answer: they take nutrients from food
Explanation:
Cells get energy by taking in nutrients from food. Cells get energy only by taking in oxygen from the atmosphere.
Look at the image.
Answer:
it is the bodies first line of defense
Explanation:
Atomic number and atomic mass both come from which part of an atom?
Answer:
A JIJOKNH;KPH;OHNLK////HI8I89UHUJK
Explanation:
THE BOTHE
JFOJIFJRIJFORGJKOTKGOPTGK35[PGKOPO34JG43POGJPJG'53OIGHO5GIHIUHJ4RNGF4IOHT'P953JGP5I9PTGJO5PO4GJKROGJRE;LGJE;LKRKGNJKLERJG5KJLGTJ5IJGIOTJGIP54JGIP54JGUO5TGNIO54RKLNG4O4%kGPO35JG54KHL[P45JHGOW46TK6HMBK54N G;54RMGK5W4RNGPOIOJTBO
What are 4 facts about Earth's outer layer? Subject: Science 7th grade Plate motion.
Which one of the following statements is correct regarding rods and cones in the human eye? . *
a. Cones are sensitive to dim light.
b. Cones are sensitive to bright light.
c. Rods are sensitive to bright light.
d. Rods can sense colour.
Answer:
Rods are sensative to bright light
Explanation:
Rodes are important for being able to see darkness, while Cones are importnat for seeing colors.
if a cell lacked ribosomes, it would not be able to
Answer:
build or break down proteins
hope this helps :)
19
!!
Which of the following best describes the function of the
ribosomes in eukaryotic cells? (1 point)
decodes the sequence of bases on the mRNA
and then creates specific proteins
makes lipids and steroids that will be used in the
production of membranes and hormones
modifies proteins that require specific
attachments of sugars or lipids and packages
proteins for export
energy-producing structure of the cell and
location of cellular respiration
it
Answer:
Decodes the sequence of bases on the mRNA and then creates specifc proteins
Explanation:
Decodes the sequence of bases on the mRNA and then creates specific proteins. Therefore, option (A) is correct.
Ribosomes in eukaryotic cells are responsible for protein synthesis, a crucial process in which they decode the genetic information carried by mRNA molecules. Ribosomes read the mRNA sequence and use it as a template to assemble amino acids in the correct order, forming a polypeptide chain that folds into a functional protein. This process, called translation, occurs in two main subunits of the ribosome, which come together on the mRNA strand.
Ribosomes ensure accurate protein synthesis by matching each mRNA codon with the appropriate amino acid, guided by transfer RNA (tRNA) molecules. Ultimately, ribosomes play a central role in translating genetic information from DNA to create a wide variety of proteins that perform diverse functions within the cell and organism, making them essential components of cellular machinery. Therefore, option (A) is correct.
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Some species of hares are brown most of the year, but change color to white in the winter. This allows them to
blend in through the seasons.
Where are these organisms adapted to live?
O deciduous forests
O desert
O tropical rain forests
O savanna
how does lipases contribute to homeostasis
Answer:
The presence of the cholesterol and short lipid tails keeps the cell membrane fluid, allowing the passage of necessary materials across its layer. This one major mechanism helps the cell with the maintenance of homeostasis.
Explanation:
During cellular respiration, every living thing uses ______ and releases ______ back into the environment.
Answer:
oxygen and carbon dioxide
Explanation:
baby names connect to gender, and names flow from male to androgynous to female but never in reverse. the reason for this is that
In most cultural and religious doctrines, masculinity seems to be weighted well above the feminine gender. Hence, greater level of power or hierarchy is leveled towards the masculine gender. Hence, the reason for the trend in m naming pattern is due to the power alloted to male species.
Naming pattern usually follow the standard trend of having a root which is meant for the male kid, before transitioning to a fairly refined or similar name which is attributed to female kids. Intermediate names which can be used for either gender are called androgynous names sometimes precedes the female naming convention.Therefore, the pattern of naming with the masculine version coming first is due to the higher heirachical power given to males.
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Which formation is the result of wind erosion?
a. glacial erratic
b. u-shaped valleys
c. mud slidesally
b. unusually shaped rocks
Answer:
No answer. But you can learn off this;
Explanation:
Wind erosion abrades surfaces and makes desert pavement, ventifacts, and desert varnish. Sand dunes are common wind deposits that come in different shapes, depending on winds and sand availability. Loess is a very fine grained, wind-borne deposit that can be important to soil formation.
Thanks.
Hydrogen pumps move hydrogen ions into which structure?
O A. The thylakoid
O B. The mitochondrion
O C. The cytosol
D. The stroma
Answer:
a
Explanation:
i
what is excretion meaning
Excretion is a process in which metabolic waste is eliminated from an organism. In vertebrates this is primarily carried out by the lungs, kidneys, and skin. This is in contrast with secretion, where the substance may have specific tasks after leaving the cell. Excretion is an essential process in all forms of life.
In simple terms, the process of eliminating or expelling waste matter.
hope this helps have a great day and please do tag me brainliest if you are satisfied with the answer
Excretion is a process in which metabolic waste is eliminated from an organism. In vertebrates this is primarily carried out by the lungs, kidneys, and skin. This is in contrast with secretion, where the substance may have specific tasks after leaving the cell. Excretion is an essential process in all forms of life.
Some predators hide in plain sight before ambushing their prey by virtue of their ____________________.
Answer:
Some predators hide in plain sight before ambushing their prey by virtue of their Physical adaptations to their environment_.
Explanation:
it allows them to sneak up on their prey and get them before they can react
(aka: camouflage)
does the moon make it's own light? explain how the moon gives us light at night?
Answer:
The moon doesn't produce its own light. Moonlight is actually sunlight that shines on the moon and bounces off. In other words, its surface reflects light from the sun.The perceived brightness of the moon from Earth depends on where the moon is in its orbit around the planet.
Explanation:
How is curdling of milk a natural change?Please answer ASAP...
Answer:
because when curd is formed from milk, milk loss its properties and new things curd is formed
the ability to move from one location to another is
Why does water have a strong surface tension and why is this important?
The stronger the cohesive force, the stronger the surface tension. The water molecule has two hydrogen atoms bond to an oxygen atom through covalent bonding. ... Formed bonds are called hydrogen bonds which lead to strong cohesive forces between the water molecules and high surface tension of water.
Why is it important?The surface tension of water provides the necessary wall tension for the formation of bubbles with water. The tendency to minimize that wall tension pulls the bubbles into spherical shapes. Surface tension and droplets: Surface tension is responsible for the shape of liquid droplets.
How does the cell membrane in the diagram above help to maintain the health of this cell?
A.
By breaking down old organelles and macromolecules
B.
By regulating the transport of materials in and out of the cell
C.
By manufacturing protein to provide energy for the cell
D.
By storing food as future energy for the cell
Answer:
B
Explanation:
Cell membrane controls what goes in and out of a cell, so this is how it contributes to the wellbeing of the cell :)
The wood used for making paper is mostly made of
Answer:
Wood consists primarily of cellulose (mostly from fibers which give strength and support to the tree) and lignin, which cements the fibers together. Cellulose makes up roughly 65 to 80 percent, and lignin about 20 to 35 percent of the weight of wood.
Explanation:
Hope this helps...
“Astro” is to do with space, stars
True or False
True
Make me as brain liest
Which biome do you think had the most biodiversity? Why?
Answer:
Tropical forests have the highest biodiversity and primary productivity of any of the terrestrial biomes.
Explanation:
study hard
what do Physical scientist explore?
Answer:
A physical scientist works mainly in a laboratory (although fieldwork may be possible), conducts experiments or makes observations, analyzes findings, operates necessary equipment, and develops and tests theories.
Explanation:
Hope This Helps!
Answer:
They explore physical things like venturing out in nature to see the size, shape, and where it goes in the ecosystem.
Explanation:
1) What percentage of oxygen and carbondioxide inhaled and Exhaled Air ? ..
Answer:
21% of oxygen and 0.04% of carbon dioxide inhaled; 16.4% of oxygen and 4.4% of carbon dioxide, exhaled
Explanation:
The amount of inhaled air contains 21% of oxygen and 0.04% of carbon dioxide, while the air we breathe out contains 16.4% of oxygen and 4.4% of carbon dioxide.
Organelles are specialized structures that perform various functions in the cell. What are the
functions of the organelles in an animal cells?
Answer:
The function of organelles is to provide a specific function for the cell.
Explanation:
Eukaryotes have organelles not prokaryotes. All the cellular processes of prokaryotes occur in one cell. The advantage of having seperate spaces to do various functions is for regulation and maintance.
