Animal Kingdom — BIOLOGY STD 11 Science — Question

Describe the endocrine functions of thymus. (Any four)

Water is not a nutrient but is very important for digestion. If a person does not drink enough water, it can lead to which of these problems? Explain the possible problems which can arise because of the situation as per your answer.

1. There will be less secretion of digestive enzymes.
2. The person may suffer from poor bowel movement; leading to constipation.

Name the two amino acids involved in the formation of amides in plants.

Distinguish between impulse conduction in a myelinated nerve fibre and unmyelinated nerve fibre.

Name the tissue that performs the following functions:

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

1. What is constipation?
2. What is defaecation?

Differentiate between fibrous joints and cartilaginous joints with an example of each.

What do you understand by apical dominance?

Name three phases of interphase. Give one major event of each phase.

Comment hormones are called informational molecules.