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प्रश्न
Give reason:
Monocytes are called scavengers.
उत्तर
At the site of infection monocytes enlarge and differentiate into macrophages which engulf microorganisms and remove cell debris.
Hence they are also called scavengers.
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संबंधित प्रश्न
What is Humification?
The partially decomposed organic matter is formed by a process called ______.
What is the role of decomposers in an ecosystem?
Fill up the blank with the words given:
Deer eats only plant products and so, is called ______.
Match the following
| 1. | Biotic factor | Terrestrial Ecosystem |
| 2. | Sewage | Land pollution |
| 3. | Fertilizers | Air pollution |
| 4. | Desert | Water Pollution |
| 5. | Smoke | Animals |
Which of these organisms are the most important decomposers in an ecosystem?
What are decomposers? What will be the consequence of their absence in an ecosystem?
Read the clue and fill up the blanks given below each of them.
Animals which eat other animals.
_A _N_V_R_S
Read the clues and fill up the blanks given below each of them.
Animals which eat only plants and plant products.
HE_B_ _ _ _ E_
Match the following Column I with Column II.
| Column I | Column II |
| A. Mesozoic | (i) First land vertebrates |
| B. Devonian | (ii) Proliferation of reptiles |
| C. Palaeocene | (iii) Raise of modern mammals |
| D. Permian | (iv) Radiation of primitive mammals |
| (v) 166 million years |
