Anatomy of Flowering Plants — BIOLOGY STD 11 Science — Question

Name the basic nitrogenous catabolite produced during protein catabolism in humans. In what form is it excreted out? Giving two reasons, explain why it is advantageous to eliminate it in the latter form rather than in its initial form.

What is the significance of splitting of water, during photosynthesis?

Write a short note on the following: (1) Climactic respiration (2) Bakanae (Foolish Seedling).

Jelly fish belongs to class:

1. Hydrozoa.
2. Scyphozoa.
3. Anthozoa.
4. None of these.

Which one of the following pairs of animals comprises ‘jawless fishes’?

1. Guppies and hag fishes.
2. Mackerals and Rohu.
3. Lampreys and eels.
4. Lampreys and hag fishes.

Name the hormones that regulate the following:

1. Control of skin colour.
2. Release of sugar from liver.
3. Widening of pelvis at birth.
4. Leydig's cells of testis.

Name atleast two hormones which result in fluctuation of Ca⁺⁺ level.

Rashi, a class VII student was sitting with her mother (who is an editor for Biology). Her mother was insisting her to have some fruits to which Rashi refused repeatedly. Her mother tried convincing her by saying that proper diet is important for growth. Rashi argued saying that even plants grow without taking any food. To this, her mother smiled and explained her how plants make food with the help of leaves.

1. Name the term used for the process of food production in plants.
2. What are the factors required by plants for this process?
3. What are the additional function of leaves.
4. What values are shown by Rashi's mother?

Describe the functions of any four hormones of the pituitary gland.

When does anaerobic respiration occur in man and yeast?