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8090 [49]
3 years ago
12

The distribution of related animals and plants across the world

Biology
1 answer:
iragen [17]3 years ago
4 0

The distribution of related animals and plants across the world shows that those organisms have common ancestor.

There is a term in biology- the most recent common ancestor (MRCA) and it is the most recent individual from which all the organisms are directly descended. It is hard for scientist to identify the exact MRCA, but it is estimated the time at which the MRCA lived (3.5 to 3.8 billion years ago). It is called Last Universal Common Ancestor (LUCA).

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hoa [83]

Answer:

A. esophagus

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D. pancreas

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Explanation:

3 0
3 years ago
Which characteristic differentiates amphibians from reptiles?
Stells [14]

Option D – amphibians may use their skin for gas exchange is the characteristic feature of amphibians that differs from reptiles.

Explanation:

The amphibian skin is moist, thin and marbled and supplied by blood vessels running on its surface. The moisture present in the skin dissolves the oxygen present in its surrounding which is absorbed by the blood vessels. Special glands help the amphibians to keep the skin moist.

The very thick and tough scales present on the reptiles prevent them to absorb oxygen through their skin. Hence, they breathe and respire through their lungs.

Amphibians have three-chambered heart. They do not develop amniotic eggs. Adult amphibians although spend much time on land, they breed only in water due to the absence of amniotic sac .

7 0
3 years ago
HELP ASAP
myrzilka [38]

Answer:

its a and b for this anwser

7 0
3 years ago
Robert Hooke was the first person to observe that every sample of living things he observed under a microscope were composed of
aksik [14]
The answer is:

A) Cells are the basic unit of life.
6 0
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What statement best describes the relationship between heat and temperature
amid [387]
You didn't give any statements but, temperature is the measure of the amount of heat in a substance or object. Heat is <span>a form of energy associated with the movement of atoms and molecules in an object. </span>
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