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3 questions · self-marked practice — reveal the answer and mark yourself.

Question 15 Marks
Read the paragraph and answer the following questions:

I am a penguin. I live in polar region covered by snow. My abdomen is white. My skin is thick with a layer of fat underneath. My body is spindle-shaped. My wings are small. My toes are webbed. We live in flocks.

1.Why is my skin white and thick and why is there a thick layer of fat underneath?
2.Why do we live in flocks sticking close to each other?
3.Which geographical region do I inhabit? Why?
4.Which adaptations should you have to enable you to live permanently in the polar region? Why?
Answer
1.

  1. White skin colour camouflage with the snow so penguins cannot be easily spotted and they get protected from enemies.
  2. Thick skin and thick layer of fat underneath gives them protection from severe cold.


2.Penguins live in flocks sticking close to each other because sticking close to each other reduce the relative area so there is least loss of heat and they get protection from cold.
3.

  1. Penguins inhabit Antarctica region. Antarctica is surrounded by ocean. Climate is colder, drier and windier.
  2. It does not have human population. This climate is suitable for penguins, so they inhabit Antarctica.


4.

  1. I should be a warm blooded animal. This should allow me to permanently live in polar region.
  2. My body has to be covered with thick fur or scale so that loss of heat will be very less and I can survive in severe cold.
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Question 25 Marks
Observe the diagram and answer the questions.

Image
1.What habitat does this camel live in?
2.State any 2 of its body adaptations to survive in desert?
3.How does a camel protect itself from sand storms or winds carrying sand?

Answer
1.Camel lives in desert habitats or in areas where there is scarcity of water.
2.

  1. Thick skin to prevent loss of water from the body
  2. The eyelashes are long and thin
  3. Their legs are long and flat with cushioned soles

3.Camels have nostrils protected by folds of skin and long thick eyelashes to prevent entry of fir dust and sand into its nose and eyes.

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Question 35 Marks
Draw a neat labelled diagram of fish and answer the following questions.

Image
1.Why do fish have a body tapering towards both its ends?
2.Why do Fish have transparent eyelids.
3.How are they able to float?

Answer
1.Fish have its body tapering towards its ends, to allow them to swim with least resistance in water.
2.The transparent eyelids of fish protect the eyes from the substance in the water
3.Fish have air bladders within their body which help them to float.
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