Sets
Biology Set 16
30 questions 1. Which of the following are natural agents that help in turning and loosening the soil?
2. The combined challenge of climate change, biodiversity loss and pollution is known as the:
3. Rh incompatibility between an Rh-negative mother and an Rh-positive foetus causes:
4. M.W. Beijerinck described the infectious extract of diseased tobacco plants as:
5. The small bone that protects the knee joint is the:
6. The tiny pores on the surface of leaves that help plants take air in and out are:
7. The tissue that transports water and minerals from the roots to other parts of the plant is:
8. The space of 10 to 50 nm between the two membranes of the nuclear envelope is called the:
9. A healthy adult man has, on average, ___ RBCs per mm³ of blood.
10. Transfer of pollen from the anther of a flower of one plant to the stigma of a flower of another plant of the same type is called:
11. Biogas produced by microbes in an oxygen-free environment contains a high proportion of:
12. Tissue-level organisation is first seen in the phylum:
13. Mature human red blood cells survive for approximately:
14. Which of the following prokaryotes completely lacks a cell wall?
15. In a few reptiles, the sex of the developing animal is determined by the:
16. Consider the following pairs:
(I) Frog – External fertilisation
(II) Lizard – Internal fertilisation
(III) Fish – Internal fertilisation
Which of the pairs given above is/are correctly matched?
17. Consider the following statements about antibiotic resistance:
(I) Taking antibiotics when not required contributes to it.
(II) Some bacteria can transfer resistance to other bacteria.
(III) Antibiotics are effective in treating influenza.
Which of the above is/are correct?
18. Consider the following statements:
(I) Enzymes are specific in their action.
(II) Plastics are readily broken down by bacteria.
(III) Substances not broken down by biological processes are non-biodegradable.
Which of the above is/are correct?
19. The basic filtration unit of the kidney is the:
20. Which animal produces 5,000–50,000 eggs at a time?