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

Which one of the following produces antibodies?

What is injected in vaccination?

Write the functions of DNA.

1. What does the adjoining diagram illustrate?
2. Name the parts labelled 'A' and 'B'
3. Name the type of cells that produce this molecule.

Write a short note on ‘Mutational breeding’.

Define organic evolution.

Name the high-yielding semi-dwarf varieties of wheat selected and introduced in India in 1963.

Give reason :
Emasculation is done in a flower which is selected as female parent.

What is ‘biofortification’?

Which steps would you follow to develop a new variety of crop plant by selective breeding?

What is plant breeding?

Name the genes responsible for making Bt cotton plants resistant to bollworm attack. How do such plants attain resistance against bollworm attacks? Explain.

In Brassica (rapeseed, mustard)........................ varietys is resistant to Aphids.

(a) Pusa A-4
(b) Pusa Gaurav
(c) Pusa Sawni
(d) . Pusa Shubra

Give an example of the source of thermostable enzyme DNA polymerase.

Vijaya, Padma, Kanti and Jayanti are high-yielding varieties of ______.

What are plasmids?

Give the names of ‘two’ insect-resistant crop varieties.

What is protobiogenesis?

What is emasculation?

What are transgenic plants? Explain with any two examples