PART - 2 - Unit V : CH - 19 Chemical Coordination and Integration — BIOLOGY STD 11 Science — Question

Write the main characteristics of Chondrichthyes fishes.

What special anatomical features are displayed by leaves of C4-plants? How do they provide advantage over the structure of C₃-plants?

Describe major features of Plant Kingdom.

Lakshita was studying endocrine system for her unit test. She was confused how hormones produce their effects on the target tissue.
She read many times, but still did not understand the process. She asked the same to her neighbour Stuti, a biology teacher in a school. Stuti explained her about the hormone receptor complex through diagrams and flowcharts.

1. Name the two types of receptors.
2. Why do different hormones use different types of receptors?
3. What are second messengers? Give two examples?
4. What values reflect from Lakshita's character?

Write the difference between:
Red and White muscles

How does a muscle shorten during its contraction and return to its original form during relaxation?

Compare mitosis with meiosis.

List five main groups of natural plant growth regulators. Write a note on discovery, physiological functions and agricultural/horticultural applications of any one of them.

Give an account of Glycolysis. Where does it occur? What is the end product? Trace the fate of these products in both aerobic and anaerobic respiration.

Describe the internal structure of the heart by drawing a diagram.