Question

Organisms living in the oceans are provided with a relatively constant environmental temperature. In order for plants and animals to make the move land, a higher cellular _________ was critical to help maintain a relatively constant internal temperature.

Answer 1

Out of the following given choices;

A)pH

B)ion gradient

C)salt concentration

D)water concentration

The answer is; D

Water has a high heat capacity, meaning the energy required to raise the temperatures of a unit mass of water by one degree is high (compared to other elements). This way, water act as a good buffer to temperatures because it gains heat slowly and loses heat slowly.