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प्रश्न
"Cattle and goats do not browse the Calotropis plant." Justify the statement giving reasons.
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उत्तर
Organisms have evolved features that allow them to survive in the complex food chain and protect them from predators. A good example of this is calotropis. Calotropis, often known as milkweed, produces cardiac glycosides, which are extremely dangerous chemicals that harm a mammal's heart. The calotropis plant uses this defence strategy to keep animals away from it. Cattle and goats do not eat or browse on this plant because of this.
संबंधित प्रश्न
Name important defence mechanisms in plants against herbivory.
Name the type of association: Crow feeding the hatchling of Koel
Distinguish between the following: Parasitism and Mutualism.
Tabulate and analysis of two species population interaction.
Identify the morphological means of defence to avoid herbivores shown by plants.
Select the CORRECT match:
| I | II | ||
| i. | Competition | a. | Lichen |
| ii. | Commensalism | b. | Sea anemone and clownfish |
| iii. | Mutualism | c. | Lions and Leopards |
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 | ______ |
Give one example for the following type.
Biological control agent
The diagram given below shows the life cycle of a malarial parasite. Study it carefully and answer the questions that follows:
- Name the hosts in which the asexual phase and sexual phase of the life cycle takes place.
- Identify the infective stage labelled ‘D’.
- Name the structure labelled ‘A’ and ‘E’.
- Give any one symptom of malaria.
Give one example of camouflage.
