MODEL PAPER 9 — BIOLOGY STD 11 Science — Question

Lalit, student of class XI always likes to have junk food. His mother insists him to have fibre rich fruits and vegetables, because they are good for health. Lalit always ignored his mother's advise. One day, while his biology teacher was teaching about the digestive system and mechanism of digestion. She also explained about the food one should eat (Le., balanced diet) Lalit remembered his mother's advice and asked his teacher about the importance of fibre rich food in one's diet.

1. According to you, what is the advantage of having fibrous material in our food?
2. Name the term used to describe fibrous materials which is indigestible in nature.
3. Name any four fibre rich fruits.
4. What values are reflected through Lalit's character?

List any two differences between anabolism and catabolism.

If a plant is girdled, which part of the plant dies first-the root or the shoot? Answer by giving reasons.

How do chylomicrons differ from micelles with regard to their structural components?

How can plants be grown under limited water supply without compromising on metabolic activities?

Describe the ground tissue system. Make a labelled diagram of the stomata with the dumb-bell shaped guard cell.

Name the tissue that performs the following functions:

1. Coagulation.
2. Transmission of message.
3. Clearing dead cells.
4. Haemopoiesis.

Frogs are beneficial for mankind, justify the statement.

An owner of an apple orchard wants to get better yield and wants to wait for good market conditions to sell his apples. Which PGR should he use to achieve his goals?

Cyanobacteria and some other photosynthetic bacteria do not have chloroplasts. How do they conduct photosynthesis?