Workbook Class 6 Science Chapter 9 The Living Organisms and Their Surroundings

 Chapter 9 

The Living Organisms and Their Surroundings

 

I. Answer the following questions in brief:

Q.1. How do plants and animals living in water breathe?

Ans. Plants and animals living in water can breathe air or take oxygen from dissolved oxygen in water.

Q.2. Why do camels have long legs?

Ans. The camels long legs helps to keep their bodies further away from hot ground.

Q.3. What is acclimatization?

Ans. The process of changes that can occur in an organism over a short period of time that helps it to adjust to it surroundings is known as acclimatization.

Q.4. What is the use of needle like leaves to the trees in mountains?

Ans. The needle like leaves to the trees in mountains help in a) reduce transpiration. b) sliding off the snow c) absorbing sunlight.

Q.5. Why do lions eyes in front of the face?

Ans. The lion has eyes in front of the face because they can find their prey easily when they are too far or near like deers, zebra, etc. 

Q. 6. Why do deer have eyes on the side of the head?

Ans. A deer has eyes on the sides of its head because this enables the animals to see predators approaching from the side as well as from behind.

Q. 7. Why do some aquatic plants have narrow and thin ribbon like leaves?

Ans. Some aquatic plants have a narrow & thin ribbon like leaves, so that they can easily bend with flowing water.

Q. 8. Photosynthesis in plants occurs during the day. When does respiration take place in them?

Ans. Respiration takes place in them all the time - both day and night.

Q. 9. Why is is warm inside a sack of wheat?

Ans. Because the seeds inside the sack of wheat respire and they give out some heat.

Q. 10. How does adaptation lead to variety of organisms in different habitats?

Ans. Living organisms are adapted to different. This means that the way they look, the way they behave, how they are built, or their way of life makes them suited to survive and reproduce in their habitats. Behavior is also an important adaptation. Animals inherit many kinds of adaptive behavior.

Q. 11. How do squids and octopuses adapt to living in sea? Give any three points.

Ans. a) These animals have gills to help them use oxygen dissolved in water.

b) Their tentacles allow them to catch any prey.

c) When they move in water they make their body shapes streamlined.

Q. 12. Name any two animals that live in water but not have gills. How do they then survive in it?

Ans. The two aquatic animals without gills are dolphins and whales. These animals come to the water surface in order to breathe as they can't breathe underwater without gills. Whales and dolphins are mammals and they breathe air into their lungs.

II. Give one term for each of the following:

(a) Changes in our surroundings that make us respond to them Stimuli.

(b) The surroundings where an organism lives Habitat.

(c) The presence of specific features or habits which enable an organism to live in its surroundings. Adaptation.

(d) Animals like lions that hunt for their prey. Predators

(e) The process of getting rid of wastes by living beings Excretion

(f) Non-living component of a habitat. Abiotic

III. Fill in the blanks:

(a) Respiration is needed by organisms to obtain energy from the food they consume.

(b) Ponds, lakes, rivers and oceans are example of aquatic habitats.

(c) Predators hunt for their Prey

(d) The process of producing more of their kind of living organisms is called reproduction.

(e) Fish breathe through gills under water.

(f) Whales breathe in air through nostrils called blowhole.

IV. State whether True or False

(a) Deer have eyes in front of the face to have a correct idea about the location of their predator. False

(b) Acclimatization is another form of adaptation. False

(c) Non-Living things do show some characteristics of living organisms. False

(d) Dolphins can breathe under water. False

(e) The mountain goat has strong hooves for running up the rocky slopes of the mountains. True

(f) Some harmful or poisonous materials do get produced in plants as wastes. True

V. Match the following:

(a) Stimulus - (vii) Response

(b) Fish - (v) Gills

(c) Excretion - (iv) Secretions

(d) Potato - (ii) Energy

(e) Respiration - (iii) Birds & (vi) Nostrils

(f) Frog - (i) Webbed feet

VI. Select the correct alternative:

(i) Which of them do/does NOT have a streamlined body?

Ans (c) Squid

(ii) The plant whose leaves fold when someone touches them is 

Ans (c) Mimosa

(iii) The fleshy part of the cacti is 

Ans (a) stem

(iv) Which of the following is NOT necessary for an organism to live?

Ans (d) All of these are necessary

(v) Trees in mountain regions have needle like leaves

Ans (c) to help the rainwater and snow to slide off easily

(vi) Which of the following help(s) a camel to the conditions in a desert?

Ans (d) All of these

 

H.W. (VII) Complete the following word-puzzle using the clues given below: