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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
What is mutualism?
Mention any two examples where the organisms involved are commercially exploited in agriculture.
How is mutualism different from commensalism?
Competition and Mutualism.
Give one example of Mutualism.
Define Community.
Community is defined as ______.
Define Absolute Mortality.
How absolute Natality differs from Realized Natality
Define population growth. Explain different types of age pyramids.
Match the following and choose the correct combination from the options given below.
| Column I | Column II |
| Mutualism | Lion and deer |
| Commensalism | Round worm and man |
| Parasitism | Birds compete with squirrels for nuts |
| Competition | Sea anemone on hermit crab |
| Predation | Barnacles attached to Whales |
Define the following term:
Parasitism
The interspecific interaction between Cuckoo and Crow is ______
Identify the interspecific interaction which one species is benefited and other is neither banned nor benefited.
Select the CORRECT match:
| I | II | ||
| i. | Competition | a. | Lichen |
| ii. | Commensalism | b. | Sea anemone and clownfish |
| iii. | Mutualism | c. | Lions and Leopards |
Which population interaction can be represented by'+''-'?
Which one of the following is an example of predation?
______ in birds is an interesting example of parasitism in which the parasitic bird lays its eggs in the nest of its host and the host incubates them.
An interaction favourable to both population but no obligatory to either is ______.
Amensalism is an association between two species where ______.
What is the interaction between two species called?
In a pond, we see plants which are free-floating; rooted–submerged; rooted emergent; rooted with floating leaves; Write the type of plant against the following examples.
| Plant Name | Type | |
| a. | Hydrilla | ______ |
| b. | Typha | ______ |
| c. | Nymphaea | ______ |
| d. | Lemna | ______ |
| e. | Vallisneria | ______ |
Lianas are vascular plants rooted in the ground and maintain erectness of their stem by making use of other trees for support. They do not maintain direct relation with those trees. Discuss the type of association the lianas have with the trees.
Give one example for the following type.
Phytophagous animal
Give one example for the following type.
Chemical defense agent
The value of 'Z' (regression coefficient) lies in the range of ______ regardless of the taxonomic group or the region.
Carnivorous animals-lions and leopards, occupy the same niche but lions predate mostly larger animals and leopards take smaller ones. This mechanism of competition is referred to as ______.
Complete the following chart regarding population interaction and re-write:
| Sr. No. | Name of interaction | Interaction between |
| 1. | ? | Plasmodium and Man |
| 2. | ? | Leopard and Lion |
| 3. | ? | Clownfish and Sea-anemone |
What are the special adaptations that endoparasites show?
Select the statement which best describes parasitism.
