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Practice each question, then open the answer or worked solution.
Which of the following cannot be called a habitat?
Ans: The correct option is (d).
Habitat is the natural environment of the organism where it lives. Cultivated land with grazing cattle is not the habitat or is not the place where cattle live. So Cultivated land with grazing cattle is not a habitat.
Following are some features of plants
(i) They lose a lot of water through transpiration.
(ii) Their leaves are always broad and flat.
(iii) They lose very little water through transpiration.
(iv) Their roots grow very deep into the soil.
Which of the combination of the above features are typical of desert plants?
(a) (i) and (ii) (b) (ii) and (iv)
(c) (ii) and (iii) (d) (iii) and (iv)
Ans: The correct answer is option - (d) (iii) and (iv)
Desert lacks water. So, plants growing in the desert are adapted to the low water conditions. Their leaves lose very little water through transpiration and most often roots are modified into the spines. The roots of the desert plant run very deep into the soil.
Boojho comes across an animal having a stream-lined and slippery body. What is the habitat of the animal?
Ans: A correct answer is an option (a).
The animals living in water are called aquatic animals. These water habitats have streamlined and slippery bodies to facilitate them to swim easily in the water bodies.
Which of the following are characteristics of living beings?
(i) Respiration (ii) Reproduction
(iii) Adaptation (iv) Excretion
Choose the correct answer from the options below:
Ans: The correct answer is option (d) (i), (ii), (iii) and (iv).
All these four given characteristics i.e. Respiration, reproduction, adaptation, excretion are the characteristics of living beings.
Earthworms breathe through their?
Ans: The correct answer is option (a) Skin.
Earthworms do not have an organ like lungs for breathing. Earthworms breathe through their skin. Gills are the respiratory organ of the fishes and other aquatic animals. And stomata is the respiration point in the case of plants.
Which of the following is not an example of a response to stimulus?
Ans: A correct answer is an option (d)- A chick hatching out of an egg.
Stimulus-response is something that provokes or causes an immediate response to an action. Watering in the mouth when we see delicious food items, closing off leaves of mimosa plant when touched, and Shutting our eyes when an object is suddenly thrown in our direction is a stimulus-response.
Which of the following is correct for respiration in plants?
Ans: A correct answer is an option (c)- Respiration takes place both during day and night. Respiration is the necessity of life. So plants respire during the day and night both.
Which of the following is an incorrect statement about excretion?
Ans: The correct answer is option (c) Excretion is the process of getting rid of excess water only. Excretion is the process of getting rid of all the waste material that is harmful to humans and plants.
Choose the set that represents only the biotic components of a habitat.
Ans: The correct answer is option (d) Aquatic plant, Fish, Frog, and Insect.
Biotic components are those components that have life and respiration. So, the Aquatic plant, Fish, Frog, and Insect all are living components.
Which one of the following is not associated with reproduction?
Ans: The correct answer is an option (a) A new leaf coming out of a tree branch.
Reproduction is the process by which new offspring or individuals are produced. And a new leaf coming out of a tree branch is not a reproduction process.