Multiple Choice QuestionsWhen 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
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
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.
D.
the end of food chain and are decomposers.
Bacteria attacking the dead animals represent the end of the food chain and are decomposers. These are the organisms that obtain energy from chemical breakdown of organisms. They secrete enzymes onto dead matter and then absorb the breakdown products. Bacteria are specialised to breakdown organic materials that are difficult for other organisms to digest. They also fulfil a vital role in the ecosystem, returning the constituents of organic matter to the environment in inorganic forms so that they can again be assimilated by producers.
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