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frutty [35]
3 years ago
15

The fibrous skeleton of the heart functions in all of these ways except in __________. the fibrous skeleton of the heart functio

ns in all of these ways except in __________. acting as the point of insertion for bundles of cardiac muscle in the atria and ventricles anchoring the valve cusps causing direct spread of electrical impulses from the atria to the ventricles lining the heart chambers, covering the heart valves, and forming the ridge of the crista terminalis preventing overdilation of the valve openings
Biology
1 answer:
photoshop1234 [79]3 years ago
6 0

The fibrous skeleton of the heart functions in all of the ways listed in the option, except causing direct spread of electrical impulses from the atria to the ventricles. The fibrous skeleton in fact supports proper coordination of atrial and ventricular contractions by blocking direct spread of electrical impulses from atria to ventricles.

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3 years ago
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Natural Selection: Mastery Test
Finger [1]

Answer:

Genetic diversity in a small population, with a high level of genetic drift and with very little migration will decrease because existing alleles will be lost and few new alleles will be introduced over time (option A).

Explanation:

Evolution - linked to the natural selection and perpetuation of a species - depends, in large part, on three fundamental factors to make it happen:

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In small and isolated populations, very little genetic variation, high levels of genetic drift and very few mutations can be observed, which could lead to some alleles being lost and the species may become extinct.

Genetic drift (GD) is an important factor in terms of natural selection, as it is the result of allelic variations that occur from one generation to another. In large populations, GD is low, given the cross between different individuals is greater. A characteristic of GD in small populations is that their levels are very high, and this leads to the eventual loss of alleles.

In this small population, without the possibility of migration -few new alelles will be introduced- genetic variation will decrease, due the genetic flow is low, reducing reproductive fitness and weakening the population's resistance to environmental changes, which could result in the long-term extinction of the species.

Learn more:

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8 0
3 years ago
2. What are fraternal twins, and how do they normally occur?
pogonyaev

Answer:

hey!

I think your answer is

They dvelop from 2 separate eggs

Fraternal twins each come from their own egg and sperm. The term for this is dizygotic , while identical twins are monozygotic.

Explanation:

hope this helps

3 0
3 years ago
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