HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions for Biology

Define the term gene flow.

Transfer of gene between the population that differ genetically from one another is called _____.

(A) Gene mutation

(B) Gene flow

(C) Genetic drift

(D) Genetic recombination

Why does the left ventricle possess a thicker wall than the right ventricle?

From the visible spectrum of light, which component is reflected by the given leaves? 

What is ‘gene flow’?

Give the applications of gibberellins. 

Give any three differences between an artery and a vein

Give the name of the causative agent of ringworm.

Explain the statement of

Test cross is back cross but back cross is not necessarily a test cross.

Define the following term:

Dihybrid cross

Long answer type question.

Define test cross and explain its significance.

Define Population.

Very short answer question.

If variation occurs in a population by chance alone and not by natural selection and brings a change in frequencies of an allele. What is it called? 

Short answer question.

Enlist the different factors that are responsible for changing gene frequency.

Match the following:

Long answer question.

By taking industrial melanism as one example. Explain the concept of natural selection.

Long answer question.

Describe the different types of reproductive isolations.

Long answer question.

Explain the different factors responsible for genetic variations.

Choose the correct alternative.

What is the minimum number of the plasma membrane that oxygen has to diffuse across to pass from air in the alveolus to haemoglobin inside a RBC?

Short answer question.

Write a note on blood plasma.