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प्रश्न
What is the ecological principle behind the biological control method of managing with pest insects?
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उत्तर
- Biological pest control is primarily reliant on predator-prey relationships.
- Baculoviruses (mainly of the Nucleopolyhedrovirus genus) effectively control various insects and arthropods.
- Beetles (such as the Coccinella or ladybird beetle) control aphids and other pests.
- Gambusia, a fish, is introduced into ponds to control mosquito larval proliferation.
- Biological control strategies used in agricultural pest control rely on the predator’s capacity to regulate its prey.
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संबंधित प्रश्न
Write what do phytophagous insects feed on.
Distinguish between the following: Parasitism and Mutualism.
Define Niche.
What is commensalism? Explain it with a suitable example.
Define population growth. Explain different types of age pyramids.
The relationship between sucker fish and shark is _________.
Using '-' to depict inhibition and '+' to depict benefit, mutualism between two species can be represented as ____________.
Which principle/theory states that 'Two closely related species competing for the same resources cannot co-exist indefinitely and the competitively inferior will be eliminated eventually.'?
______ is the adaptation of an organism i which it matches its colour with its surroundings to get protected from predators.
Statement I: If one or two species are lost, it may not affect proper functioning of ecosystem.
Statement II: Loss of key species causes serious threat to functioning of ecosystem. Choose the correct alternative with reference to the above statements
Which one of the following is an example of predation?
Mycorrhizae are the example of ______.
Rafflesia an arnoldii is an example of ______.
Amensalism can be represented as ______
A population has more young individuals compared to the older individuals. What would be the status of the population after some years?
Which of the following is a partial root parasite?
What is the interaction between two species called?
Give one example for the following type.
Phytophagous animal
Fill in the blanks
| Species A | Species B | Type of Interaction | Example |
| + | - | ______ | ______ |
| + | + | ______ | ______ |
| + | 0 | Commensalism | ______ |
Give one example for the following:
A parasitic angiosperm
Pick out the appropriate association representing brood parasitism.
A bird laying its egg in the nest of another bird is the type of ______.
In which interaction of species, both the species are at a loss?
Some orchids live on the branches of mango trees. Name the type of interaction that exists between the mango tree and the orchid.
Give one example of parasitism.
Give one example of Camouflage.
Given below are two statements.
Statement I - The amount of energy available in an ecosystem increases at each successive trophic level.
Statement II - Transfer of energy from one trophic level to the other follows 10% law.
In light of the above statements, select the correct option given below.
Association between clown fish and sea anemone is ______.
Statement I: Gause’s competitive exclusion principle states that two closely related species competing for different resources cannot exist indefinitely.
Statement II: According to Gause’s principle, during competition, the inferior will be eliminated. This may be true if resources are limiting.
In the light of the above statements, choose the correct answer from the options given below:
