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exis [7]
3 years ago
10

The National Center for Policy Analysis released a newsletter in June 2009

Biology
1 answer:
AURORKA [14]3 years ago
7 0

Answer:

So much question for only 5 points. you should give some rewards bro

Explanation:

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Which characteristic differentiates amphibians from reptiles?
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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 .

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3 years ago
Peppered moths have learned to stay still (not move) on a tree trunk during daylight hours to avoid being eaten by birds. This i
miv72 [106K]

Answer:

Behavior adaptation

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Behavior adaptation is where a animal behaves in a different manner that suits its environment or keeps the animal safe

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2 years ago
A gene consists of which of the following?
nirvana33 [79]

Answer:

answer is part (4)

Explanation:

A sequence of bases on DNA that code for a specific protein

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When is gene expression blocked in the lac operon system?
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