HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

Name the causative organism and preventive measures for Typhoid

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

Explain the mechanism of reflex action with the help of a suitable diagram.

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

What is ‘gene flow’?

Select and write the most appropriate answer from the given.
Identify the following diagram from the alternatives given below : 

In the 1950s minamata disease was caused by ____________ poisoning.  

Give any 'two' modes of transmission of amoebiasis.

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.

Give an account of poultry diseases.

Define and explain the term

Biopiracy

Define and explain the term

Biopatent

Define the term:

Bioethics

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: