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प्रश्न
Name important defence mechanisms in plants against herbivory.
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उत्तर
Herbivores are plants’ natural predators. Plants have evolved many morphological and chemical defences against herbivory. Acacia and cactus depend on thorns as their primary defence mechanism. Certain plants have compounds that can make herbivores sick, delay digestion, disrupt reproduction, or even kill them.
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संबंधित प्रश्न
During .............. typs of interaction, both organisms are benefited
- mutualism
- competition
- commensalism
- parasitism
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State Gause’s competitive exclusion principle.
Select the statement which explains best parasitism.
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The correct description for the interspecific interaction shown in the given figure is ______
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| Column A | Column B | ||
| i. | Lice on humans | a. | Endoparasites |
| ii. | Ectoparasites on marine fishes | b. | Grows on hedge plants |
| iii. | Cuscuta | c. | Ectoparasites |
| iv. | Plasmodium and humans | d. | Copepods |
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Which one of the following pair does NOT show commensalism?
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Give one example for the following type.
Predator animal
A bird laying its egg in the nest of another bird is the type of ______.
Observe the graph given below.
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The graph represents inter-specific interaction between two species of Paramecia competing for the same resource in a culture medium. Paramecium caudatum and Paramecium aurelia were grown in separate cultures as well as in mixed cultures. It was found that each species grew in numbers according to the logistic equation.
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a) Which species is competitively superior? Support it with the data provided in the graph.
b) State the underlying principle for the above result and name the scientist associated with this principle.
c) Explain the mechanism in which two or more species competing with each other can co-exist.
OR
Graphs A and B shown below depict interaction of two species. Which graph indicates Mutualism? Give reason.
 |
 |
| A | B |
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