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const2013 [10]
3 years ago
13

The human infant spends about half of its sleep time in rem. What is the understanding of why this is the case?

Biology
1 answer:
Molodets [167]3 years ago
4 0

This occurs because REM sleep may provide at least part of the stimulation necessary to correctly develope the immature brain of infants.

REM sleep provides the electrical activity necessary to establish neural connections that include the  development of synapses in the brain. These neurological process enables development of sensory, motor, learning and memory system.


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Which is a purpose for which a pedigree chart might be prepared? to determine the gender of a fetus to determine if a fetus has
Anarel [89]
The purpose for which a pedigree chart might be prepared is to identify the pattern of inheritance of a particular trait.
This pedigree chart is created so as to see which traits this new offspring has inherited from its ancestors and which may possibly be transferred onto a new offspring later on in its life. It is formed in order to find patterns of inheritance and see what the most important traits that get inherited are.
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3 years ago
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Which of these is a likely result of a beneficial or helpful mutation?
Neporo4naja [7]

Answer:

The answer would be C. An organism is able to better withstand a toxin!

Explanation:

This is most likely because if it is a beneficial mutation, it has an effect that allows the organism to better survive and thrive, and being able to withstand a toxin can definitely support survival and reproduction.

I really hope this helped you! Have a nice day! :)

5 0
2 years ago
There are no known motor proteins that move on intermediate filaments (IFs).
Harlamova29_29 [7]

Answer: The correct option is E ( Intermediate filaments are unpolarized).

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Intermediate filaments are so named because they are thicker than actin filaments and thinner than microtubules or muscle myosin filaments

The properties or characteristics of an intermediate filaments that explains the lack of motor proteins is as a result of its subunits which are elongated, not globular and are associated in an anti-polar manner. Therefore, the overall filament has no polarity, and therefore no motor proteins move along intermediate filaments

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3 years ago
Why would farmers plant alfalfa that has less economic value
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answer:

because it benefits the soil. the long alfalfa stand life also gives the soil a chance to rest from frequent field crop rotations, helps provide nitrogen for subsequent crops, and improves soil tilth. this helps prevent pesticide and sediment movement to natural waterways.

good luck :)

hopefully, this helps

have a great day !!

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How do rocks form and change
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Igneous rocks form when molten rock (magma or lava) cools and solidifies. Sedimentary rocks originate when particles settle out of water or air, or by precipitation of minerals from water. Crystallization, erosion, sedimentation, and metamorphism transform one rock type into another or change sediments into rock. The rock cycle describes the transformations of one type of rock to another. The process by which a rock changes form or mineral content as a result of environmental changes such as heat and pressure. a rock that was altered by metamorphism.

3 0
2 years ago
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