Science (English Medium) Class 11 - CBSE Question Bank Solutions for Biology

Under what conditions are C₄ plants superior to C₃?

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

Name the two important enzymes of C₄ pathway, and explain their role in fixing CO₂?

Different substrates get oxidized during respiration. How does Respiratory Quotient (RQ) indicate which type of substrate, i.e., carbohydrate, fat or protein is getting oxidized?

`R.Q. = A/B`

What do A and B stand for?
What type of substrates have R.Q. of 1, < 1 or > 1?

Given below are the abnormal conditions related to blood circulation. Name the disorders.

Acute chest pain due to failure of O₂ supply to heart muscles

Given below are the abnormal conditions related to blood circulation. Name the disorders.

Increased systolic pressure

Which coronary artery diseases is caused due to narrowing of the lumen of arteries?

Briefly describe the following:

Atherosclerosis

Briefly describe the following:

Hypertension

Briefly describe the following:

Heart failure

Write short note on the following:

Hypertension

Write short note on the following:

Coronary Artery Disease

Which of the following is removed from our body by lungs?

Wax secreting gland present in the ear canal is called ______.

The part of internal ear responsible for hearing is ______.

The organ of corti is a structure present in ______.

Comment upon the role of ear in maintaining the balance of the body and posture.

Arrange the following in the order of reception and transmission of sound wave from the ear drum:

Cochlear nerve, external auditory canal, eardrum, stapes, incus, malleus, cochlea.

While travelling at a higher altitude, a person complains of dizziness and vomiting sensation. Which part of the inner ear is disturbed during the journey?

What is the function ascribed to Eustachian tube?