CBSE Class 10 English Sample Paper Set G

CBSE Class 10 English Sample Paper Set G. It’s always recommended to practice as many CBSE sample papers as possible before the examinations. The latest sample papers have been designed as per the latest blue prints, syllabus and examination trends. Sample papers should be practiced in examination condition at home or school and also show it to your teachers for checking or compare with the answers provided. Students can download the sample papers in pdf format free and score better marks in examinations. Refer to other links too for latest sample papers.


SECTION A: READING

1. Read the following passage carefully and answer the questions that follow :

Hibernation

Hibernation is one of the main adaptations that allow certain northern animals to survive long, cold winters. It is a state of inactivity and metabolic depression in endotherms. 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 woodechuck‟s body temperature drops by more than 30 degrees Celsius and its heart rate slows from 80 to 4 beats per minute ! Other true hibernators include the jumping mouse, little brown bat, eastern chip munk and several ground squirrels. Other animals, such as the skunk and racoon are not considered „true hibernators‟ as they wake up in the 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 animal starts 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 they sleep. They add leaves and grasses to keep themselves warm. They retreat to a den, a burrow or a hollow log for protection and shelter.

 

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