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प्रश्न
Name and explain the type of interaction that exists in mycorrhizae and between cattle egret and cattle.
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उत्तर
Mycorrhizae are associations between fungi and the roots of higher plants. It is an example of mutualism in which both fungi and plants are dependent on each other for nutritional needs. Fungi absorb and transport essential nutrients to plants and in turn plants supply sugar molecules to the fungi.
The interaction which exists between cattle egret and cattle is known as commensalism. In this type of interaction, one species is benefited, whereas the other is neither benefited nor harmed. The cattle egret (bird) usually moves in proximity to the grazing cattle. As cattle move in the grass, they stir up the grass and flush out the insects which then become an easy target for the egret. In this way, the cattle is neither benefited nor harmed, but the egret is benefited.
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संबंधित प्रश्न
With the help of a neat and labelled diagram explain VAM (vesicular arbuscular mycorrhizae).
Trichoderma konigi is a source of _______ enzyme.
(A) invertase
(B) lipase
(C) pectinase
(D) cellulase
Name the type of association that the genus Glomus exhibits with higher plants.
What is VAM?
Write a note on biocontrol agents.
What is mycorrhiza?
Match the column A with B and rewrite correct pairs
| A | B | |
| I | Mycoherbicides | Cactoblastis |
| II | Bacterial herbicides | Alternaria |
| III | Insects as herbicides | Xanthomonas |
Which of the following statements regarding biocontrol agents are correct?
Many members of genus Glomus form a mycorrhizal association with plants. Elaborate how is this association beneficial to the plants.
A farmer grew 2 varieties of corn crops in fields A and B. He grew normal corn crops in field A and GM corn crops in field B. He observed corn borers attacked only in field A. To control it, spores of Bt were sprayed in field A.
- Name the gene in the spores responsible for the control of this pest.
- What effect will the spores of Bt have on the insect pest?
- How has field B developed resistance against this pest?
