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

Define the term dedifferentiation. 

Define the term determinate growth.

Define the term meristem.

Both growth and differentiation in higher plants are open’. Comment.

Which hormone deficiency is responsible for the following?

Cretinism

What is the effect of pCO₂ on oxygen transport?

Can you suggest any reason for the sigmoidal pattern of the oxygen dissociation curve?"

Have you heard about hypoxia? Try to gather information about it, and discuss with your friends.

Write the differences between open and closed system of circulation

Describe the evolutionary change in the pattern of heart among the vertebrates.

Sino-atrial node is called the pacemaker of our heart. Why?

What is the significance of atrio-ventricular node and atrio-ventricular bundle in the functioning of heart?

Micturition is carried out by a reflex.

Explain micturition.

Write true or false. If false change the statement so that it is true.

Human skeleton has 206 bones.

Write true or false. If false change the statement so that it is true.

There are 11 pairs of ribs in man.

Write true or false. If false change the statement so that it is true.

Sternum is present on the ventral side of the body.

Write the difference between Pectoral and Pelvic girdle.

All mammals (except a few) have ______ cervical vertebra.

The number of phalanges in each limb of human is ______.