Biology Set 11 FAQs

1. The gas released during photosynthesis, which makes a lit matchstick burn with an intense flame, is:

2. The longest part of the alimentary canal is the:

3. The leaves fold when touched in:

4. Bio-catalysts used to break down complex substances into simpler ones are called:

5. The epithelial tissue made of a single layer of tall, pillar-like cells, specialised for absorption, lines the:

6. The average life span of RBCs is:

7. In 2010, a synthetic copy of the DNA of which bacterium was inserted into a related cell whose own DNA had been removed?

8. After fertilisation, the ovary develops into a:

9. Which of the following plants has taproots and reticulate venation?

10. Consider the following statements about the events during photosynthesis: (I) Absorption of light energy by chlorophyll. (II) Splitting of water molecules into hydrogen and oxygen. (III) Oxidation of carbon dioxide to carbohydrates. Which of the above is/are correct?

11. Green plants in a terrestrial ecosystem capture about ______ of the energy of sunlight falling on their leaves.

12. The gas released by plants during photosynthesis is:

13. Consider the following statements: (I) Gibberellins help in the growth of the stem. (II) Cytokinins are present in greater concentration in fruits and seeds. (III) Abscisic acid promotes growth. Which of the above is/are correct?

14. Rhododendrons on mountain tops in the Shola forests of Nilgiris survive heavy winds because they have:

15. The most diverse plant group on the Earth is:

16. The 17th-century work on Indian plants compiled by Hendrik van Rheede is:

17. Plantlets mass-produced from the shoot tip (apical meristem) by tissue culture help eliminate:

18. Which pair of phyla possesses an exoskeleton?

19. Consider the following pairs: (I) Producers – First trophic level (II) Primary consumers – Second trophic level (III) Secondary consumers – Fourth trophic level Which of the pairs given above is/are correctly matched?

20. The inbuilt tendency for variation during reproduction is the basis for:

21. The Chipko movement began in the early 1970s in:

22. Potassium hydroxide is used to absorb:

23. The menstrual cycle usually begins at puberty between the ages of:

24. The heart is called myogenic because its normal activity is regulated by:

25. The Earth's magnetic field is believed to originate from the movement of:

26. The blood cells that plug leaks by helping to clot the blood at points of injury are:

27. Which of the following is NOT a component of the cytoskeleton?

28. The exchange of material between blood and surrounding cells takes place across the walls of:

29. The green pigment in leaves that helps in capturing sunlight is:

30. The F2 phenotypic ratio when two separate traits are inherited independently in pea plants is: