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Pavel [41]
3 years ago
13

The Mesozoic era was the "Age of Reptiles." At the end of the Mesozoic era, many groups of animals disappeared suddenly. Scienti

fic evidence suggests that which of the following occurred at that time?
A. The Earth stopped rotating for a brief time.
B. The animals began living underground.
C. The animals were hunted to extinction by humans.
D. A large asteroid or comet impacted the Earth.
Biology
1 answer:
KengaRu [80]3 years ago
5 0
The answer is d. A large asteroid or comet impacted the Eartg
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The number of species present in a sample, community or taxonomic group is called
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Answer:

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Aphids are small, white bugs that live on the underside of leaves. They steal nutrients out of plants. This is an example of....
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Answer:

I'm pretty sure the answer is Parasitism

Explanation:

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The gut of ruminants contains a highly diverse mixture of microbes responsible for digesting a wide variety of complex plant mol
podryga [215]
<h2>Microbes and ruminants relation</h2>

Explanation:

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4 years ago
What do bone marrow and epidermis have in common. A.they are both sites of new cell information B.they both contain structures t
poizon [28]
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
The bone marrow and epidermis have in common.  is that 
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3 0
4 years ago
During the course of an action potential, the membrane potential rapidly rises and reaches a peak of about 40 mV before falling
elena-14-01-66 [18.8K]

Answer:

This is because the voltage gated sodium channels which opens for the influx of sodium ions, which caused  increased postivity of the axoplasm closed, with simultaneous opening  of potassium channels.

Therefore depolarization stopped, thus  propagation  and transmission of action potential (caused by depolarization) which cause the reversal of charges in the membrane (making the axoplasm  more negative) for the voltage rise to 40mV also stopped.

In addition the  simultaneous opening  of voltage gated potassium channels caused K+ to leave the axoplasm to the external environments. This makes the inner membrane to be negative further lowering the potential, to -75mv. This is  re-polarization.

Explanation:

7 0
3 years ago
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