15. Answer in detail IV

 

a. Bats are the only mammalsinsectsarthropods that are capable of true flight. Most bats live in hollowed logscavesall of the abovetrees.

 

b. Bats are important to the humans as it increasesreduces the insect population present and helps in the pollination of plants. 

 

c. Bats are active at daynight, which is an important and useful adaptation to them, as flight requires lot of energy during the day.

 

d. The bat's wings is formed by a thickthin membrane that stretches across the arms, elongated fingers, along the body to form an umbrella-like structure that is called a patagiumhibernation. This causes excessive reflectionabsorption of the sun's rays.

 

e. The forelimbshindlimbs of the bats are modified to serve as wings, which are large and strong.

 

f. Bats use a high-frequency system called screamsecholocation.

 

g. To conserve energy, they go into the hibernationaestivation state where there is reduced activity.