Advertisements
Advertisements
प्रश्न
Name important defense mechanisms in plants against herbivores.
Advertisements
उत्तर
Defense mechanisms in plants against herbivores can be morphological like thorns (in Acacia, Cactus) or chemicals like poisonous cardiac glycosides (produced by Calotropis), secondary metabolites (for e.g.nicotine, caffeine, quinine, strychnine, opium, etc.)
APPEARS IN
संबंधित प्रश्न
Mention any two examples where the organisms involved are commercially exploited in agriculture.
Define the following term:
Camouflage
Brood parasitism is best explained by the example of ____________.
Match the Columns.
| 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 |
Identify the type of negative interaction.
Which one of the following pair does NOT show commensalism?
What is commensalism?
What is mycorrhiza?
What are the organisms that feed on plant sap and other plant parts called?
Observe the set of 4 figures A, B, C and D and, answer the following questions
- Which one of the figures shows mutualism?
- What kind of association is shown in D?
- Name the organisms and the association in C.
- What role is the insect performing in B?
 Fig. (A) |
 Fig. (B) |
 Fig. (C) |
 Fig. (D) |
