Question
What is the effect of pollution on soil?
✓
Answer
Soil is the foundation of a healthy biosphere. Precipitation from air as acid rain and dry deposition of pollutants on land surface contribute to soil pollution. Pollutants combine with plant nutrients and are consumed by animals. Polluted soils unfavourably affect the microbial environment resulting in reduction in mineralization and decomposition processes. Soil fertility and aeration are also reduced, earthworms, nematodes, etc., are destroyed by toxic chemicals.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The below diagram is of a developing embryo is a mother’s womb:
(i) Write the functions of the placenta, amnion, and umbilical cord.
(ii) How are the waste products of a fetus removed?
(iii) What is the gestation period?
(i) Write the functions of the placenta, amnion, and umbilical cord.
(ii) How are the waste products of a fetus removed?
(iii) What is the gestation period?
Complete the following table:
→| Components | Origin | Function | Approx. No. $(mm^3)$ | Life span |
| RBCs | ||||
| WBCs | ||||
| Platelets |
Complete the following table by filling in the blank spaces.
| Structure | Function |
| Yellow Spot | |
| Transfers impulse from inner ear to brain | |
| Helps to change the focal length of the eye lens | |
| Spinal cord | |
| Oval window | |
| Dynamic equilibrium |
Given below is a diagram depicting a defect of the human eye. Study the same and then answer the questions that follow:
(i) Name the defect shown in the diagram.
(ii) Give two possible reasons for this defect of the eye in human beings.
(iii) Name the type of lens used to correct this eye defect.
(i) Name the defect shown in the diagram.
(ii) Give two possible reasons for this defect of the eye in human beings.
(iii) Name the type of lens used to correct this eye defect.
State three ways in which roots are suited for absorbing water.
LONG ANSWER
How can the knowledge of processess of reproduction help people in limiting the size of their families? Give two concrete examples.
How can the knowledge of processess of reproduction help people in limiting the size of their families? Give two concrete examples.
The figure below represents the internal structure of a mammalian heart and the associated blood vessels.
(i) (a) Name each of the structures labeled 1, 2, 3, 4, 5, 6, 7 and 8.
(b) State the function of each of the structures 5, 6, 7, and 8.
(ii) (a) State the function of the heart as an entire organ.
(b) Why are the walls of the left ventricle more muscular than the right?
(i) (a) Name each of the structures labeled 1, 2, 3, 4, 5, 6, 7 and 8.
(b) State the function of each of the structures 5, 6, 7, and 8.
(ii) (a) State the function of the heart as an entire organ.
(b) Why are the walls of the left ventricle more muscular than the right?
Differentiate Between Transpiration and Guttation.
Explain the Term: Urinary bladder
Given below is a diagrammatic representation of certain types of blood vessels in human body.
Where can such an arrangement be found as an example - in lungs or in heart walls?
Where can such an arrangement be found as an example - in lungs or in heart walls?