Expiration is when food goes bad and idk how to help sorry
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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Matter cannot be generated or destroyed, according to the Law of Conservation of Matter. Because the same carbon atoms are recycled throughout the carbon cycle, it is an illustration of the Law.
Answer: simple . They just ask you questions on how you are doing , not all teachers will give you math questions or biology questions . Ask her what the topics will be about .
