When a natural predator (living being) is applied on the other pathogen organism to control them, this process is called

• biological control

• genetic engineering

• artificial control

• confusion technique

172.

The 10% energy transfer law of food chain was given by

• Stanley

• Weismann

• Lindemann

• Tansley

Match column I with column II and select the correct option from the codes given below.

Column I	Column II
A. Commensalism	(i) One inhibited, other unaffected
B. Parasitism	(ii) One benefitted, other unaffected
C. Mutualism	(iii) Both are benefitted
D. Amensalism	(iv) One benefitted, other harmed

• A - (iv), B - (ii), C- (iii), D - (i)

• A - (iii), B - (iv), C - (ii), D - (i)

• A - (ii), B - (iv), C - (iii), D - (i)

• A - (ii), B - (iv), C - (i), D - (iii)

Which of the following is used as bioinsecticide?

• Bacillus polymyxa

• Cylindrospermum licheniforme

• Phytophthora palmivora

• Chrysanthemum cinerarifolium

Most animals that live in deep oceanic waters are

• tertiary consumers

• detritivores

• primary consumers

• secondary consumers

Assertion: In a terrestrial ecosystem, detritus food chain is the major conduit for energy flow.

Reason: Solar energy is the direct source for energy supply in a detritus food chain.

• 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

What is the Greek word for ecology?

• Ethology

• Oekologie

• Synecology

• Hexicology

Rain is called acid - rain when its pH is below

• 7

• 6.5

• 6

• 5.6

Assertion : Secondary succession takes place in recently denuded area.

Reason : It is caused due to baring of an area.

• 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

The bacteria which attack dead animals are

• first link of the food chain and are known as primary producers

• second link of the food chain and are herbivorous

• third link of the food chain and are tertiary consumers

• the end of food chain and are decomposers.