List of top Questions asked in Maharashtra Class XII

Explain following terms : (a) Grafting \quad (b) Apomixis \quad (c) Polyembryony \quad (d) Parthenocarpy

Explain the steps involved in preliminary treatment of sewage.

Give the different steps involved in formation of m-RNA from hn-RNA.

Explain unique features of acquired immunity.

Name and describe hormones secreted by ovaries.

Explain different steps involved in PCR technique.

Identify A, B, and C from the above diagrams and give their functions.

What are the limitations of root pressure theory?

Distinguish between human sperm and ovum.

Enlist the uses of gene therapy.

Define the following terms : (a) Gene flow (b) Chromosomal aberrations

What are the significances of double fertilization?

Identify and define 'A' and 'B' in relation to uptake of water by the root :

Describe mutualism.

Explain factors affecting water absorption.

What is differentiation and redifferentiation?

Give the name of endocrine gland which is prominent at birth but gets gradually atrophied in adult stage.

What is the full form of IAA?

Give the name of microbial source of antibiotic chloromycetin.

Which cells of islets of Langerhans produce a hormone insulin?

How many meiotic divisions are required for the formation of 300 seeds in angiosperm?

Explain the term Emigration.

What are the reasons for the success of Mendel?

Arrange the following steps of DNA fingerprinting in correct sequence :

Gel electrophoresis
Isolation of DNA
Southern blotting
Restriction digestion