HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Biology

What are VNTRs?

What is exactly measured in Dobson units or DU?

Answer the following:

How many primary spermatocytes and oocytes are required for the formation of 100 spermatozoa and ova?

When was Human Genome Project started? When was it completed?

Name the gas released and the process responsible for puffing up of the bread dough when Saccharomyces cerevisiae is added to it.

Explain Oogenesis with diagram.

Distinguish between human sperm and ovum.

Lever mechanism of pollination is observed in

1. Salvia
2. Jasmine
3. Bougainvillea
4. Butea

With the help of a suitable example, explain protandry.

Enlist the causes of deforestation.

Enlist advantages and disadvantages of cross pollination

Add a note on pollination mechanism in Salvia.

Give the floral adaptations for anemophily.

What is deforestation?

Complete the following chart and rewrite.

                                       (Or)

Explain outbreeding devices in angiospermic plants.

Select and write the most appropriate answer from the given alternatives for the following subquestion: 

A versatile anther is an adaptation for _______ type of pollination. 

Attempt any TWO of the following: 

Define ‘deforestation’. Comment on its effects

In bisexual flowers, maturation of gynoecium before androecium is known as ______.

The permanent removal of forests and woodlands is called ---------------

Suggest measures to conserve the forests.