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barxatty [35]
2 years ago
5

Which best describes red blood cells?

Biology
1 answer:
OLga [1]2 years ago
5 0

Answer:

Your answer should be C.

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Abiotic and biotic factors of a river/ bank
Vera_Pavlovna [14]
Rocks,water,pebbles = Abiotic 
Fish =Biotic

3 0
3 years ago
A newborn baby dies soon after birth because her diaphragm and rib cage muscles failed to contract and she was unable to breathe
kozerog [31]

Answer:

Troponin

Explanation:

This is a complex of three proteins  (Trop C, I, T) that are responsible for muscle contraction of  the skeletal and cardiac  muscles . its binds with protein tropomysin  to lie in the grove between the actin filaments.  its prevents contraction by blocking  myosin crossbridge  in a relax muscles.Inorder to aid contractions  calcium ions binds with troponin, which leads to confrontational change.This exposes myosin on actin filaments,  leading to formation of crossbridge and therefore contraction of muscles.

Therefore if there is  a mutation in the gene that encoded Troponin, as explained above, calcium ion  will not be able to bind with tropinin, and there will be no exposure of myosin on actin filaments, no binding of  myosin on actin to cause crossbridge, and consequently no  muscle contraction,

Thus the intercoastal  muscle and diaphragm will not contract leading to death of the baby.

8 0
2 years ago
Read 2 more answers
Why do Plants cells have cell walls and Animal cells do not?​
zimovet [89]

Answer:

Plants need a rigid structure. Animal cells have flexible cell membranes. So animal cells can have a variety of shapes, but plant cells can not, they have to take the shape of their cell walls. Both plant and animal cells are eukaryotic, so they contain membrane-bound organelles like the nucleus and mitochondria.

4 0
1 year ago
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Not all amino acids have to be supplied by food. this is true because:
vlabodo [156]
"<span>b. the liver is able to manufacture some amino acids from others."

The liver has the capability to transform some amino acids into others (called non-essential because they can be produced by the body and there is no need to get them from food). This is done by transamination. Transamination is the process of transferring an amino group from one molecule to another without forming ammonia thanks to enzymes that are called transaminases and preform such transfer.</span><span>
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8 0
2 years ago
Select the correct answer.
Digiron [165]

Answer:

C. It reduces the percentage of recombinats

Explanation:

When linkage between two genes increases, the chance of these two crossing over is reduced, because linkage keeps these particular genes together, unlike crossing voer which will mix them up.

6 0
2 years ago
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