Important Question class7 science Chapter-Weather,Climate And Adaptation

Q1 How polar bear is adopted in the polar climatic condition.

Ans:A polar bear has following adaptation features:

  • They have white fur so that they are not easily visible in the snowy white background which helps it to protect them from their predators. It also helps them in catching their prey.
  • They have two thick layers of fur to protect them from extreme cold.
  • They also have layer of fat under their skin.
  • The polar bear goes for swimming for physical activities on warm days necessary for cooling.
  • Its paws are wide and large, which help it not only to swim well but also to walk with ease in the snow.
  • Polar bears can remain under water for long durations.
  • It has a strong sense of smell so that it can catch its prey for food
    Q2 Explain with examples how animals have adapted themselves to overcome the competition for food and shelter in the rainforests.

    Ans:To overcome the competition for food and shelter, some animals are adapted to get food which is not easily reachable. Example, red-eyed frog has developed sticky pads on its feet to help to climb trees on which it lives. Another example is of the Toucan bird, which possesses a long, large beak. This helps a toucan to reach the fruits on branches which are otherwise too weak to support its weight.

    Q3 What are adaptations? Explain the types of adaptations.
    Ans:Adaptation is trait of an organism that has been favoured by natural selection. Adaptations are of following types: –
    Structural adaptations are special body parts of an organism that help it to survive in its natural habitat (e.g., skin colour, shape, and body covering). Behavioural adaptations are special ways of a particular organism that behaves to survive in its natural habitat. Physiological adaptations are systems present in an organism that allow it to perform certain biochemical reactions (e.g., making venom, being able to keep a constant body temperature).

    Q4Why tropical rain forest has large population of animals?

    Ans:Tropical rain forest’s climate is hot and it gets plenty of rainfall, because of continuous warmth and rain this region supports wide variety of plants and animals, its climatic condition is highly suitable for supporting and enormous number and variety of animals and plants.

    Q5Whatis camouflage?

    Ans:Camouflage is the built-in protection in the animals which increase their chances of survival by tricking predators.

    Q6 Why is camouflage important for animals?

    Ans:Many tropical animals have sensitive hearing, sharp eyesight, thick skin and a skin colour which helps them to camouflage by blending with the surroundings. This helps them to protect themselves from predators. Example, big cats like lions and tigers have thick skin and sensitive hearing.

     

    Q7 How camouflage helps in adaptation?

    Ans:Camouflage is the built-in protection in the animals which increase their chances of survival by tricking predators.

    Many tropical animals have sensitive hearing, sharp eyesight, thick skin and a skin colour which helps them to camouflage by blending with the surroundings. This helps them to protect themselves from predators. Example, big cats like lions and tigers have thick skin and sensitive hearing.

    Q8 Explain migration.

    Ans:The regular seasonal journey undertaken by many species of animals and birds to escape the harsh and cold conditions of weather is known as migration. Many animals, birds and fishes migrate to warmer regions in winter and come back when winter is over. Migration is marked by its annual seasonality. For example, the Siberian crane that comes from Siberia migrates to India at places like Bharatpur in Rajasthan and Sultanpur in Haryana

    Q9Writea short note on the characteristics of Beard ape?

    Ans:The lion-tailed macaque (also called Beard ape) lives in the rainforests of Western Ghats. Its most outstanding feature is the silver-white mane, which surrounds the head from the cheeks down to its chin. It is a good climber and spends a major part of its life on the tree. It feeds mainly on fruits. It also eats seeds, young leaves, stems, flowers and buds. This beard ape also searches for insects under the bark of the trees. Since it is able to get sufficient food on the trees, it rarely comes down on the ground.

    Q10 How do elephant living in the tropical rainforest adapt itself?

    Ans: The elephant has adapted to the conditions of rainforests in many remarkable ways. It uses the trunk as a nose because of which it has as strong sense of smell. The trunk is also used by it for picking up food. Moreover, its tusks are modified teeth. These can tear the bark of trees that elephant love to eat. So, elephant is able to handle the competition for food rather well. Large ears of elephant help it to hear even soft They also help the elephant to keep cool in the hot humid climate of the rain forest.


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