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

Give any ‘two’ factors responsible for genetic variation.

Mention any 'two' ecological services forthe benefit of mankind

Define vegetative propagation.

Explain with tile help of a chart, explain the compatibility of human blood groups.

Explain the significance of a test cross.

Explain ABO  blood group system in human being with a suitable chart.

Overproduction is the principle of

(A) Lamarckism

(B) Theory of organic evolution

(C) Panspermia theory

(D) Modern theory of evolution

Why only left ovary and oviduct arc present in birds?

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 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?