Question

Hibernation is one of the main adaptations that allow certain northern animals to survive

long, cold winters. Hibernation is like a very deep sleep that allows animals to save their

energy when there is little or no food available. The body functions of true hibernators go

through several changes while they are in hibernation.

Body temperature drops and the heart rate slows down. For example, a hibernating

woodchuck’s body temperature drops by more than 30 degrees Celsius and its heart rate

slows down from 80 to 4 beats per minute! Other true hibernators include the jumping

mouse, little brown bat, eastern chipmunk, and several ground squirrels. Other animals such

as the skunk and racoon are not considered true hibernators, as they wake up in winter to feed

and their body functions do not change as much.

Since they only sleep for a little bit at a time, the term ‘dormancy’ or light sleeping’ is used

to describe their behaviour.

The largest animals to hibernate are bears. Their heart rate may

slow down from a usual 40-50 beats per minute to 8-12 beats per

minute, but their body temperature changes very little, so they

are able to wake up quickly.

Hibernating animals have a special substance in the blood called

hibernation inducement trigger, or HIT. This substance becomes

active in the fall when the days become cooler and shorter. When

HIT becomes active, the animals start preparing for winter.

Some animals store food so that they can eat when they wake up

and some animals eat a lot in late summer and fall to add excess

fat to their bodies.

This fat keeps them warmer and acts as a source of energy while

they are sleeping. Some animals also make changes to the places

where they will sleep. They add leaves and grasses to keep themselves warm.

i. Why do animals hibernate?

ii. The body functions of true hibernators go through no changes while they are in

hibernation (True/False)

iii. Which of the following is not a true hibernating animal?

(a) Woodchuck

(b) Jumping mouse

(c) Skunk

(d) Little brown bat

iv. What is full form of HIT?

v. When do animals start preparing for hibernation?

(a) When days become cooler and shorter

(b) When days become hot and humid

(c) When they have stored plenty of food

(d) When they want to take rest

plz answer after reading this passage​

Answer 1

Answer:

i)Animals hibernate to survive through the long cold winters

ii)true

iii)(c) skunk

iv)hibernation inducement trigger

v)(a) when days are cold and long

Explanation:

hope this helps you out

(the options in last questions are wrong.By my side i think this is the best answer i could find)

Answer 2

Answer:

i. Animals hibernate to survive long cold winters.

ii. False

iii. Skunk

iv. Hibernation Inducement Trigger

v. When days become cooler and shorter