Page 1 : CLASS VII, CHAPTER-8, SURROUNDINGS AFFECT THE LIVING, , D. How the adaptation given helps the animal concerned?, 1. Trunk is an elephant., Ans. Helping in breathing and smelling, it is an additional limit to hold food and put that into, mouth, repeat the leaves from trees and cool itself when it is hot ( by filling it with water and, displaying on own body)., 2. Hump at the back of a camel., Ans. It has a hump on its back which store fat is Reserve food with which it can survive, without food for days., 3. Long swinging tail of a monkey., Ans. It is capable of grasping branches on trees while jumping from one branch to another., 4. Ability of frog to be able to breathe through the skin as well as through lungs., Ans. Frogs are amphibious (can live both on land and in water) when on land they breathe in, air with their lungs and in water, frogs absorb oxygen dissolved in in water with their slimy, skin., 5. Desert animals staying in burrows during the day., Ans. Come out only at night to avoid heat from Sun. This habit especially in summer and, come out of their place of hiding only at night., The animal that are active at night are called nocturnal animals., 6. White bear having a thick double coat of fur and blubber inside., Ans. Thick fine fur for traps the air and keep their body warm., Blubber in addition to fur helps the animal in bearing extreme cold., 7. Long and strong beak in Toucan., Ans. It can reach to the fruits on the high and tender branches using its long and strong beak., 8. Migratory habit in Arctic tern., Ans. Migratory birds from the cold regions travel to the warmer regions to avoid severe cold, and to search food and get back to their original habitat after the winter gets over., 9. Chameleon ability to change the colour of its exterior to match the surroundings., , 1

Page 2 : Ans. This change in the colour of the body which merges with the surroundings is called, camouflaging., 11. Tusk in an elephant., Ans. Task are modified (enlarged) incisors (teeth) which protrude out of the mouth they are, used as an organ of defence and also in tearing the tree trunks., , A. Short answers type questions., 1. Why lion tailed macaque has been given the name of beard ape?, Ans. Its outstanding feature is the Silver white mane surrounding Its face from head down to, the chin. It is also called beard ape since its mane appears to be as if it is wearing a beard., 3. What are the two adaptations which help a white bear to resist cold., Ans. Fat stored in the body of bear allows it to survive for long without food, and the sense of, smell of the animal is very strong with which it can locate the fish under the snow., 5. What is aestivation? In which climate region it is practiced by the animals and why?, Ans. Habit (with animal found living in desert) to pass hot part of the day especially during, summer, in hiding and coming out only at night or early in the morning., 8. List the adaptations that help red eyed frog to live safely on trees., Ans. Adaptations of frogs:, • It is easily hide itself in between the green leaves on trees., • It bears sticky pads on its feet which helped it to climb and stay on trees., • It is nocturnal in habit and has sharp eyesight to be able to see in the dark., 11. List the factors which determine the weather at a place., Ans. The factors which determine the weather at a place are:, • Time of the day, • Sunshine, • Temperature, • Air pressure, • Speed and direction of wind, • Humidity, • Clouds, • Rain (sleet or snow), , B. Long answers type questions, 4. What is meant by adaptation? Explain with an example., Ans. The acquired habit or structural modification in the body to be able to live in a particular, place., Ex. Polar bear is a big animal that has adapted itself to be extremely cold Arctic life., , 2

Page 3 : Extra questions;, 1. What is migration give the example of migratory animals., Ans. Animals moving from their place of living at the approach of adverse climate to another, place with favourable climate., Ex. Siberian crane, Arctic tern, Deer, Fox and Yak., 2. What do you mean by predators?, Ans. Animals that Prey on other animal for their flesh (food), is called predators., , 3