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प्रश्न
Give one example for the following type.
Chemical defense agent
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उत्तर
Chemical defense agent - Cardiac glycosides produced by calotropis
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संबंधित प्रश्न
Select the statement which explains best parasitism.
- One organism is benefited
- Both the organisms arc benefited
- One organ is benefitted, other is affected.
- One organism is benefited, other is affected
Competition and Mutualism.
Name the type of association: Hummingbirds and host flowering plants
In Logistic growth curve lag phase shows______.
What is ESS?
Define mutualism.
Explain any three important characteristics of population.
Define population growth. Explain different types of age pyramids.
Which of the following is TRUE for amensalism?
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 |
Exarch xylem is found in:
An interaction favourable to both population but no obligatory to either is ______.
A population has more young individuals compared to the older individuals. What would be the status of the population after some years?
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 | ______ |
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) |
Interspecific interaction could be ______.
"Abingdon tortoise in Galapagos islands became extinct within a decade on introduction of goats in the island." Explain giving reason.
Some orchids live on the branches of mango trees. Name the type of interaction that exists between the mango tree and the orchid.
Give one example of commensalism.
