Photosynthesis in Higher Plants — BIOLOGY STD 11 Science — Question

Rahul exercises regularly by visiting a gymnasium. Of late he is gaining weight. What could be the reason? Choose the correct answer and elaborate.

1. Rahul has gained weight due to accumulation of fats in body.
2. Rahul has gained weight due to increased muscle and less of fat.
3. Rahul has gained weight because his muscle shape has improved.
4. Rahul has gained weight because he is accumulating water in the body.

Briefly mention the mechanism of action of FSH.

Write any three advantages of scientific names.

Which tissue is afflicted by Myasthenia gravis? What is the underlying cause?

Skin is a respiratory organ in:

1. Lizards.
2. Birds.
3. Primitive mammals.
4. Frog.

Trachea of cockroach and mammal are similar in having:

1. Paired nature.
2. Non-collapsible walls.
3. Ciliated inner lining.
4. Origin from head.

Anurag and Amit (students of class XIth) were best friends, one day during the lunch time Anurag gave naashpati (Pyrus) to Amit (as he was fond of that). Amit refused to eat it because he did not like them due to their hardness as compared to apples. Anurag reached home and told her mother (a botanist) that he will also not eat naashpati's. His mother corrected him and told him that he should eat it, as it contains the calcium for the growth of the body.

1. What is the reason for the difference in the softness in apple and naashpati fruits?
2. What are sclereids?
3. What values are inferred from mother's of Anurag's character?

Write the functions of the following:
Centromere.

Interfascicular cambium and cork cambium appear later in the life of a dicot plant; yet how do they differ from each other?

When does anaerobic respiration occur in man and yeast?