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AleksandrR [38]
3 years ago
9

By the end of the ____ period, all major animal lineages were present in the seas due to a great adaptive rafiation of animals

Biology
1 answer:
natali 33 [55]3 years ago
6 0

Answer: cambrian

Explanation:

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Most a waves from an earthquake disappear at a distance of about 11,500 kilometers from the epicenter of the earthquake. Explain
dsp73
11500 -the shbshsnkanxba
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3 years ago
Pillbugs are placed in a container where they have a choice of a wet or a dry environment. Researchers record how much time was
alexdok [17]

Answer: Wet or dry environment.

Explanation:

<u>The independent variable is the variable that a researcher manipulates in an experiment in order to carry out a study on the incidence of the expression of the dependent variable.</u> Therefore, the independent variable is the one that changes or is controlled to see its effects on the dependent variable.

Researchers can then design a container with a wet or dry environment. But it's the pillbugs that are going to choose where to go and how long to spend in each part. So the time they spend in each part is a dependent variable since that cannot be controlled by the scientists conducting the experiment. Henceforth, the researches will just record this dependent variable without controlling it. But they can decide what to put in the container to make it wet or dry environment, or whatever they want to design. So wet or dry environment is the independent variable.

7 0
3 years ago
Read 3 more answers
Which specialized carbohydrate is used in shrimp exoskeletons?
otez555 [7]

Answer:

chitin

Explanation:

chitin is a complex carbohydrates, similar to cellulose, that makes up organic structure, such as the cell walls of fungi and exoskeletons of insects and other arthropods.

4 0
2 years ago
Axons from mPFC neurons synapse onto intercalated cells in the amygdala that contain the neurotransmitter __________.
sammy [17]

The medial pre Frontal Cortex neurons synapting with the intercalated cells of Amygdala contains <u>GABA</u> as the neurotransmitter.

Option a

<u>Explanation:</u>

The Amygdala has two types of nerve cells getting attached with it primarily. They are the fibres from the mPFC or medial pre Frontal Cortex and the vIPAG or ventrolateral periaqueductal grey. These neurons do have different functions on the whole body.

The fibres from the mPFC do have emotional function on the human body whereas the fibres of vIPAG do have an effect on the muscle tone . And it's seen that both the nerve fibres that are getting attached with the intercalated cells of Amygdala do secrete GABA and are inhibitory GAB Anergic in nature.

8 0
2 years ago
Prokaryotic DNA is enclosed within a nucleus, while eukaryotic DNA is not.<br>O True<br>O False​
blagie [28]

Answer:

False

Explanation:

Prokaryotes do not have a nucleus.

This means their DNA is not enclosed in a nucleus and instead is in the cytoplasm.

On the other hand, eukaryotes have nuclei, so their DNA is enclosed within a nucleus.

So, this statement is false.

3 0
3 years ago
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