Exercise
NCERT Science Solutions for Exercise
Simple step-by-step solutions to Exercise questions of Our Environment from Science Textbook of Competency Based Questions for Class X. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.
Questions from Exercise with Hints & Solutions
Many processes happen in the bodies of living organisms.
Those processes which involve the building up of complex molecules from simple ones are called anabolism. Those which involved the breakdown of complex molecules into simple ones are called catabolism.
Which of the following life processes can be considered as an example of anabolism?

Which of the following option shows the correct products of anaerobic respiration in humans and in yeast?

Which of these will reduce if compost is used in place of inorganic fertiliser in farms?

What is the ratio of average amount of energy absorbed by the producers to the average amount of energy absorbed by the primary consumers?

Which of the following describes of flow of energy and nutrients, respectively, through the ecosystem?

Answer the following question based on the information given below:
Shown here is the extent to which two different animals can see in either direction without turning their heads. In animal 1, the eyes are placed towards the front of the head, and animal 2; the eyes are placed on either side of the head.
Since the placement of eyes in the two animals is different, their vision is also slightly different.
In the figure above, the grey part represents the part that both eyes can see at a time, while the white part represents those parts that can be seen only by one eye at a time.
Animal 2 can see a broader area at any time compared to animal 1. Animal 1 can distinguish depth better compared to animal 2.
Based on this, which of the following two animals is most likely to be a Predator and why?

Answer the following question based on the information given below:
Shown here is the extent to which two different animals can see in either direction without turning their heads. In animal 1, the eyes are placed towards the front of the head, and animal 2; the eyes are placed on either side of the head.
Since the placement of eyes in the two animals is different, their vision is also slightly different.
In the figure above, the grey part represents the part that both eyes can see at a time, while the white part represents those parts that can be seen only by one eye at a time.
Animal 2 can see a broader area at any time compared to animal 1. Animal 1 can distinguish depth better compared to animal 2.
Observe the following food web. Classify the animals into two groups - one that would need to have a vision as animal 1 and another as animal 2 in the diagram above:

Arrange the four objects given above according to the time they take to get biodegraded(LEAST time TO MOST time).
Bone | Metal can | Paper sheet | Plastic bottle |
