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

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?

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 ______.

What part of the plant would show the following:

Well developed pith

Formation of enzyme-substrate complex (ES) is the first step in catalysed reactions. Describe the other steps till the formation of product.

Which one of the following will not directly affect transpiration?

The process of guttation takes place ______.

Water moves up against gravity and even for a tree of 20m height, the tip receives water within two hours. The most important physiological phenomenon which is responsible for the upward movement of water is ______.

From your knowledge of physiology can you think of some method of increasing the life of cut plants in a vase?

Salt is applied to tennis lawns to kill weeds. How does salting tennis lawns help in killing of weeds without affecting the grass?

We know that plants are harmed by excess water. But plants survive under flooded condition. How are they able to manage excess water?