HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Important Questions

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?

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

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

Longer toes and long prehensile tail indicate which adaptation?

All organisms produce more young ones. Comment

Define ‘reproductive isolation’ and explain two types of reproductive isolation.

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? 

What is ‘gene flow’?

Write a note on Cro-magnon man. 

Very short answer question.

Name the ancestor of human which is described as a man with an ape brain.

Long answer question.

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

_______ is considered as connecting link between ape and man.

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

Define the term ‘Mendelian population’.

Whose fossils were discovered at the site of Shivalik hills, India?

Distinguish New world and old world monkeys based on their tail along with their examples.

What led to better utilization of hands for holding objects effectively and better motor skills?