Three weeks is how long a human can live without food
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
.
The physiological process which explains the principles is mitosis b.
All types of Active transport require ATP:
-Active transport
-Endocytosis
-Exocytosis
A. is slowed by limiting factors. B. exhibits a period of rapid growth as the population size increases. ... Like logistic growth, exponential growth can be plotted in the shape of an S curve.
