Aestivation and Hibernation

Q.

Which of the following animals undergoes summer sleep?

1. Pigeon

2. Duck

3. Frog

4. Man

Q.

Name the adaptations found in penguins and polar bears

Q.

Given below are some adaptive features of animals.

1. A layer of fat under the skin.
2. Long, curved, and sharp claws.
3. Slippery body.
4. Thick white fur.

Which of them are the adaptive features of a polar bear?

1. (i) only

2. (i) and (ii) only

3. (i), (ii), and (iii) only

4. (i), (ii), and (iv) only

Q. During winter, frogs enter into a state of unconsciousness where their metabolic activites slow down. This state is called .

Q.

What is the relation between climate, adaptation and evolution? [3 MARKS]

Q. ___ is the state of inactivity and metabolic depression in organisms during winter.

Q. Draw a lake showing different zones. Why are they called so?

Q.

How polar animals protect themselves from excessive cold conditions?

Q. Plants which produce characteristic pneumatophores and show vivipary belong to

1. Psammophytes
2. Mesophytes
3. Hydrophytes
4. Halophytes

Q. Choose the correct statements regarding hibernation.

1. Hibernation takes place during extreme heat.
2. Body temperature and breathing rate of animals decrease.
3. Animals go into a state of unconsciousness.
4. Hibernation takes place during winter.

Q. Which of the following characteristics are observed in the animal given in the image?

1. It has spindle shaped body.
2. It has fur on its skin.
3. Its body is white in colour.
4. Its body is light in weight.

Q.

The mountain goat has white shiny fur give reasons for it?

Q.

Explain with examples, why we find animals of certain kind living in a particular climate conditions?

Q. Thick and long hair on the body is an adaptation of animals found in ________.

Q. Many animals use the diurnal and seasonal variations in light intensity and photoperiod to time their

1. Reproductive activities
2. Suspension
3. All of these
4. Migration

Q.

What is the difference between an Aestivation and Hibernation?

Q. Define Diapause

Q. Many tribes living in high altitudes of Himalayas have

1. High WBC count than people living in plains.
2. Lower WBC count than people living in plains.
3. Higher RBC count than people living in plains.
4. Both RBC and WBC counts are lower than people living plains.

Q. Give an example of an organism that enters 'diapause' and why?

Q.

Where do bryophytes grow?

Q. The adjustment of pupil of our eye to light intensity is an example of

1. Eutrophy
2. Steady state
3. Adaptation
4. All of the above

Q. The biological adaptation that allows frogs to obtain water for their survival during conditions of water scarcity is the

1. Presence of modified tongue that acts like a sponge to suck water from damp soils
2. Presence of water channels in the skin by which they absorb water from their surroundings
3. Presence of ciliated oesophagus that helps in separating water from ingested particular matter
4. Selective feeding on plants with large amount of water that would fulfill the water requirement

Q. Match column I with column II

1. A- 1, B- 2, C- 3, D- 4
2. A- 1, B- 4, C- 3, D- 2
3. A- 1, B- 3, C- 2, D- 4
4. A- 1, B- 3, C- 4, D- 2

Q.

Does Fucus have a haplodiplontic lifecycle?

Q. Solve the puzzle:

Across:

4.Animals that are active during the night.
5.A thick coat present on the leaves of xerophytes.

Down:

1.React negatively to bright light.
2.Provide anchor to earthworm in the soil burrows.
3.Thin, black wing membrane of bats.

Q. Answer in 200 to 250 words:
a) What is Adaptation?
b) Write the causes and symptoms of 'Altitude sickness'.
c) What is 'Brood Parasitism'? Give an example.

Q. Which of the following organisms are badly affected when large habitats are broken up into small fragment due to various human activities?

1. Mammals requiring small territories
2. Planktons showing diapause
3. Animals with migratory habits
4. Birds requiring small territories

Q. Animals aestivate during _________ season.

1. winter
2. summer
3. rainy
4. spring

Q. Adaptations are meant for

1. Change
2. Improvement
3. Survival
4. Extinction

Q. A prehensile tail as in chameleon is an adaptation for

1. Grasping
2. Swimming
3. Sliding
4. Climbing