HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Important Questions for Biology

Give any four factors that favour high speciation at lower altitudes.

With the help of any one example explain Alien species invasion as one of the causes of Biodiversity losses.

Lever mechanism of pollination is observed in

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

Define vegetative propagation.

With the help of a suitable example, explain protandry.

Enlist advantages and disadvantages of cross pollination

Add a note on pollination mechanism in Salvia.

Endosperm of angiosperm is __________.

(A) haploid

(B) diploid

(C) triploid

(D) tetraploid

Describe the formation of helobial endosperm

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. 

Sketch and label ‘structure of a pea flower’.

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

What is vegatative reproduction? Describe any 'three' natural methods of vegetative reproduction with examples?

Very short answer type question:

Name the part of gynoecium that determines the compatible nature of pollen grain.

Define Parthenocarpy.

What is adventive polyembryony?

What are the different adaptations shown by bird-pollinated flowers?

Explain water pollination in detail with its types.

Explain various categories of apomixis.