Biology Set 6 FAQs

1. The 'Save Silent Valley' movement opposed a proposed hydroelectric dam across the river:

2. Junk foods contain high levels of:

3. Consider the following pairs: (I) Dmitri Ivanowsky – Mosaic disease of tobacco (II) M.W. Beijerinck – Crystallisation of viruses (III) W.M. Stanley – Crystallisation of viruses Which of the pairs given above is/are correctly matched?

4. The heart is enclosed in a double-walled membranous bag called the:

5. Which of the following diseases is NOT caused by a virus?

6. The removal of waste products from the body is called:

7. Reproduction of a plant from its leaf, stem or root is called:

8. If gametes are formed from an organism with four chromosome pairs, each pair carrying contrasting characters, the number of possible combinations of characters in the gametes is:

9. The variety of landforms, rocks and soils, together with the processes that shape them, is called:

10. Reproduction in which a new generation is created from a single individual is called:

11. Plants and animals that live on land are said to live in:

12. Consider the following statements: (I) Mitosis produces two genetically identical daughter cells. (II) In meiosis, the parent cell divides twice in succession. (III) Gametes produced by meiosis have double the chromosome number of the parent cell. Which of the above is/are correct?

13. The respiratory pigment in human beings is:

14. The exit of food from the stomach into the small intestine is regulated by a:

15. Consider the following pairs: (I) Tendon – Connects muscle to bone (II) Ligament – Connects bone to bone (III) Cartilage – Connects muscle to bone Which of the pairs given above is/are correctly matched?

16. The enzyme in saliva that breaks down starch into simple sugar is:

17. Robert Hooke observed the first cells in a thin slice of:

18. Persons of which blood group are called universal donors?

19. Which of the following seeds requires light to germinate?

20. The Indian botanist who played a key role in the 'Save Silent Valley' movement and headed the Botanical Survey of India was:

21. Consider the following statements: (I) Mars lies at the edge of the Sun's habitable zone. (II) Mercury has a thin atmosphere about 100 times thinner than Earth's. (III) The atmosphere of Mars is about 100 times thinner than that of Earth. Which of the above is/are correct?

22. Segmented bodies with a body cavity and organ system level organisation are seen in:

23. An aquatic plant pollinated through water is:

24. A specialised, differentiated form of cell membrane, formed by infoldings and characteristic of prokaryotes, is the:

25. The part of a neuron that receives signals from other neurons is the:

26. Consider the following statements about the plasma membrane: (I) Phospholipids are arranged in a bilayer with polar heads towards the outer sides. (II) The hydrophobic tails lie towards the inner part of the membrane. (III) Cholesterol is absent from the membrane. Which of the above is/are correct?

27. The diameter of a human red blood cell is about:

28. The jelly-like cluster of frog eggs seen near the edge of a pond is called:

29. The tiger (Panthera tigris) belongs to the family:

30. Which of the following is a nitrogenous waste removed from the blood in the kidneys?