Science (English Medium) इयत्ता ११ - CBSE Question Bank Solutions for Biology

Which one of the following statements is incorrect?

Which of the following pairs is wrong?

What is the excretory product from kidneys of reptiles?

Identify the glands that perform the excretory function in prawns.

What is the excretory structure in amoeba?

Complete the following:

Dialysis fluid = Plasma –

Aquatic animals generally are ammonotelic in nature where as terrestual forms are not. Comment.

How have the terrestrial organisms adapted themselves for conservation of water?

In the mechanism of action of a protein hormone, one of the second messengers is ______.

Hormones are called chemical signals that stimulate specific target tissues. Their action depends on the presenc3e of receptors on the respective target tissues. Which of the following is the correct location of the receptors in the case of protein hormones?

What is the role of second messenger in the mechanism of protein hormone action?

Correct the following statement by replacing the term underlined.

Insulin is a steroid hormone.

Rearrange the following hormones in Column I so as to match with their chemical nature in Column II.

What is the role of second messenger in hormone action?

Cut a transverse section of young stem of a plant from your school garden and observe it under the microscope. How would you ascertain whether it is a monocot stem or a dicot stem? Give reasons.

Draw illustrations to bring out anatomical difference between Monocot stem and dicot stem.

Differentiate between guttation and transpiration.

What role does root pressure play in water movement in plants?

Describe transpiration pull model of water transport in plants. What are the factors influencing transpiration? How is it useful to plants?

A conjoint and open vascular bundle will be observed in the transverse section of ______.