Q. Give an example of immune deficiency.

Q. What is he agriculture done in fresh water is known as?

Q. What is double fertilization? Give its significance.

Q. Draw well labelled diagram of L.S. of human kidney.

Q. Draw a labelled diagram of ruminant stomach.

Q. Photosynthesis is a/an

1. Oxidation-reduction reaction.
2. Reduction reaction.
3. None of the above.
4. Oxidation reaction.

Q. The substances which produce pollution are known as

Q. Guttation occurs by

1. Lenticels.
2. Wounds.
3. Stomata.
4. Hydathodes.

Q. Define digestion. Explain the process of digestion in buccal cavity.

Q. What is oogenesis? Explain with the help of diagram.

Q. Hydroponics is

1. To grow plants in water.
2. Soilless farming.
3. To grow aquatic plants.
4. To grow floating hydrophytes.

Q. Write four differences between tendon and ligament.

Q. Which organisms is used in vermicompost formation?

Q. Write the botanical name of coconut.

Q. How will you prove that the water is the source of $O_2$ released during photosynthesis?

Q. What is spermatogenesis? Explain with the help of diagram.

Q. Match the right pairs.

Q. Why is pyramid of energy never inverted in any ecosystem?

Q. Explain the osmotic theory of opening and closing of stomata.

Q. What is humus? Distinguish between Mor and Mull humus.

Q. The currency of energy in cell is

1. DNA.
2. ATP.
3. RNA.
4. Salts.

Q. Write four differences between artery and vein.

Q. What is Joint? Explain ball and socket joint along with diagram.

Q. Describe the reflex arc with labelled diagram only.

Q. Strong, loud, unpleasant or intolerable sound is known as

Q. The pyramid of .......... is always upright.

Q. What is cross-pollination? Write advantages and disadvantages of cross pollination.

Q. Who is the greatest enemy of nature and organism?

Q. What do you mean by human population? Write the names of the factors affecting it.

Q. Write any four physiological adaptations found in aquatic plants.