HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Important Questions for Biology

Give the graphical representation of Hardy· Weinberg's principle in the form of Punnet Square.

Give the importance of fossil in support of organic evolution

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

All organisms produce more young ones. Comment

Answer the following question in ‘One’ sentence only:

Define ‘mutation breeding’.

Answer each question in ‘One’ sentence only: 

Identify which one of the following is a test cross. 

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

With the help of diagrams, describe emasculation and bagging. 

The most common types of fossils are ------------------------. 

What is ‘gene flow’?

Draw a labelled diagram of T.S. of a leaf showing Kranz anatomy. 

Select and write the most appropriate answer from the given.

Identify the type of isolation where the members of two populations have different mating behaviour which prevents interbreeding: 

Select and write the most appropriate answer from the given. 
Which stage in the life cycle of silk moth secretes silk? 

Very short answer question:

What is vestigeal organ?

Long answer question.

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

Transfer of a part of chromosome or set of genes to a non-homologous chromosome is called ________.

Define the term ‘Mendelian population’.

Explain Geographical Isolation

What is chromosomal aberration? Give any two types of aberrations found in the population.

Industrial melanism is one of the best example for ______.