Question

1. Which of the following statements is correct?

A. Small mammals are more constrained by evolutionary history than large mammals.

B. In vertebrates, connective tissue and bones are the most important elastic energy stores.

C. Collagen of small mammals has very different properties than collagen of large mammals.

D. Small animals store more elastic energy during movement than large animals.

2. When an animal is dehydrated, hormones such as vasopressin lead to increased expression of genes that code for _____, which in turn facilitate water recovery.

Answer 1

A. Small mammals are more constrained by evolutionary history than large mammals

B. In vertebrates, connective tissue and bones are the most important elastic energy stores.

Explanation -

Smaller animals produces more offspring faster in comparison to the larger animals,thus small animals are more constrained by evlutionary history than larger animals.

In vertebrates,elastic energy storage increases the eficienecny of the movement .The bone and connnective tissues are the elastic energy stores and involved in the locomotion.

Collagen of the mouse is not much different in structure and properties than the collagen present in the elephants.

The muscle and tendon stores the elastic energy when it is streched and releases this energy during work or locomtion.Thus the energy saving due to elastic energy storage is more adventageous in the locomtion of large animal than the smaller animals.

2. When an animal is dehydrated, hormones such as vasopressin lead to increased expression of genes that code for Histidine decarboxylase (HDC) , which in turn facilitate water recovery.