Exercise Question:
Que1: What is a habitat?
Ans: Habitat means a dwelling place (a home). The surroundings where organisms live is called a habitat. The organisms depand for their food, water, air, shelter and other needs on therr habitat. The oraganisms depands for their food, water, air, shelter and other needs on their habitat, several kinds pf plants and animals may share the same habitat.
Que2: How are cactus adapted to survive in a desert?
Ans: Cactus lose very littile water throught transpiration. The leaves in cactus plants are present in the shape of spines. The help in reducing loss of water from the leaves throught tarnspiration. Its stem is converted into a leaf - like structure. Photosyntyhesis in these plants is usally carried out by the stems. The stem is also covered with a thick waxy layer, which helps to retain water. Cactus plants have roots that go very deep into the soil for adsording water.
Que3: Fill up the blanks:
(a) The presence of specific features, which enable a plants or an animal to live in a particular habitat, is called_______.
(b) The habitats of the plants and animals that live on land are called ______habitat.
(c) The habitats of plants and animals that live in water are called _______ habitat.
(d) Soil, water and air are the _______ factors of a habitat.
(e) Change in our surrounding that make us respond to them, are called______.
Ans:
(a) adaptation.
(b) terrestrail
(c) aquatuic
(d) abiotic
(e) stimuli.
Que4: Which of the things in the following list are non - living?
Plugh, Mushroom, Sewing machine, Radio, Boat, Water hyacinth, Earthworm
Ans: Non - living things: Plough, Sewing machine, Radio, Boat.
Que5: Give an examples of non - living thing, which shows any two characteristics of living things.
Ans: Bus and machine both shown mavement and consume energy.
Que6: Which of non - living things listed below, were once part of a living thing?
Butter, Leather, soil, Wool, Electric bulb, cooking oil, salt, Apple, Rubber.
Ans: Butter, Leather, wool, cooking oil, Apple, Rudder.
Que7: List the common characteristics of the living things.
Ans: Living things have certain common characteristics - they need food, they respire and excrete, respond to their envirnment, reproduce, grow and show movement.
Que8: Explain, why speed is important for survival in the grasslands for animals that live there. [Hint: There are few trees or places for animals to hids in grasslands habitats.]
Ans: In the grassland there are less number of tree and places to hide. The animals are vulnerable to predators. They can only survive and escape if they can run faster. Therefore speed is important for survical in the grasslands for animals that live there.
