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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.
Define the following term:
Commensalism
How is mutualism different from commensalism?
Name important defense mechanisms in plants against herbivores.
Define community.
How absolute Natality differs from Realized Natality
What is Mortality? What are its two types?
Define the term population interactions. State its two types.
Define mutualism.
What is population interaction? Explain the interactions in Mutualism and Competition.
Two species competing for the same resources, avoid competition by choosing different times for feeding, also known as ______
Select the CORRECT match:
| I | II | ||
| i. | Competition | a. | Lichen |
| ii. | Commensalism | b. | Sea anemone and clownfish |
| iii. | Mutualism | c. | Lions and Leopards |
Parasitism can be conectly represented as ____________.
Which of the following is NOT an example of mutualism?
Substantiate by giving two reasons as to why a holistic understanding of the flora and fauna the cropland is required before introducing an appropriate biocontrol method.
Which of the following is not an example of commensalism?
The presence or interference of one species leads to reduction in feeding efficiency of other species is termed as
What is mycorrhiza?
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 | ______ |
Fill in the blanks
| Species A | Species B | Type of Interaction | Example |
| + | - | ______ | ______ |
| + | + | ______ | ______ |
| + | 0 | Commensalism | ______ |
Pick out the appropriate association representing brood parasitism.
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 |
A bird laying its egg in the nest of another bird is the type of ______.
A Tight one-to-one relationship between many species of fig tree and certain wasps is an example of ______.
"Abingdon tortoise in Galapagos islands became extinct within a decade on introduction of goats in the island." Explain giving reason.
Many copepods live on the body surface of marine fish. This relationship is an example of ______.
"Some species of insects and frogs have evolved with various specific features that help them from being detected."
- Justify the statement giving reasons.
- Mention any two such features.
Select the statement which best describes parasitism.
Describe mutualism.
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.
