71.

Assertion: The honey bee queen copulates only once in her life time.

Reason: The honey bee queen can lay fertilized as well as unfertilized eggs.

• If both Assertion and Reason are true and Reason is the correct explanation of Assertion

• If both Assertion and Reason are true but Reason is not the correct explanation of Assertion

• If Assertion is true but Reason is false

• If both Assertion and Reason are false.

Assertion : Use of fertilizers greatly enhances crop productivity.

Reason : Irrigation is very important in increasing crop productivity.

• If both Assertion and Reason are true and the reason is the correct explanation of the assertion

• If both Assertion and Reason are true but the reason is not the correct explanation of the assertion

• If Assertion is true statement but Reason is false

• If both Assertion and Reason are false statements

Silk is the secretion of

• cephalic glands

• gastric glands

• buccal glands

• salivary glands

Assertion : In plant tissue culture, somatic embryos can be induced from any plant cell.

Reason : Any viable plant cell can differentiate into somatic embryos.

• If both Assertion and Reason are true and the reason is the correct explanation of the assertion

• If both Assertion and Reason are true but the reason is not the correct explanation of the assertion

• If Assertion is true statement but Reason is false

• If both Assertion and Reason are false statements

The first transgenic crop was :

• pea

• flax

• tobacco

• cotton

A branch of science in which. forest crop can be grown in desired pattern is

• Histology

• Horticulture

• Pisiculture

• siliviculture

The bacterial disease which is found in chickens is :

• rickets

• Ranikhets

• fowl fox

• fowl cholera

Reproducing new plants by cells, instead of seeds, is known as :

• Mutation

• antibiotics

• biofertilizer

• tissue culture

sprouting of potato can be prevented in storage by

• maleic hydrazide

• gibberellins

• indole acetic acid

• cytokinins

'Royal jelly' is secreted from

• hypopharyngeal gland

• salivary gland

• milk gland

• integumentary gland