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nordsb [41]
2 years ago
15

Which of the following best explains how genetic recombination influences evolution?

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

Answer:

The correct option is A. The genetic variation introduced during recombination provides new allelic combinations for natural selection to act upon.

Explanation:

Recombination will lead to more possibilities for allelic combinations. This will result in increase in the number  of genetic variations for a population.. The genetic variations in a population help the organisms to better adapt to different environmental conditions. If genetic variation is low for a population, then there are more chances for the population to become extinct or endangered when disasters occur. Many ecologists blame lack of genetic variation for extinction of different species.

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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
A sediment core is removed from the floor of an inland sea. The sea has been in existence, off and on, throughout the entire tim
sertanlavr [38]

Answer:

A. volcanic ash layers were regularly interspersed between the sedimentary strata.

Explanation:

The discovery of a fossil is a moment of accomplishment for archaeologists, hence the date dating process begins and the older the relic the greater its value for paleontology. Chemistry is present in this process, more precisely the carbon element, but other elements can be used as uranium, lead, potassium and argon.

In the case of the fossils reported in the question, to assign absolute dates to fossils in this sediment core would be most useful if volcanic ash layers were regularly interspersed between sedimentary strata because it would separate sedimentation times and allow the use of more than one element. dating, making the search more complete and the date most credible.

5 0
3 years ago
Read 2 more answers
Explain the similarity between aquifers and banks.
stiv31 [10]

Answer:

Both hold bodies of water above and underground.

Explanation:

5 0
3 years ago
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Name five movements that are involuntary.
Reil [10]

Answer:

Five involuntary movements are- Beating of heart, Breathing, digestion, eye re-flexion, salivation.

Explanation:

Involuntary movements can be described as uncontrolled movements of the body parts on which one has no control over.

4 0
3 years ago
Where do electrons get their energy in the light reactions?
galben [10]
For the answer to the question, where do electrons get their energy in the light reactions? The answer is multiple choice letter <span>D. From photons in solar energy.

I hope my answer helped you.Feel free to ask more questions. Have a nice day!</span>
5 0
2 years ago
Read 2 more answers
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