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The orthid flowers emit a chemical that ...

The orthid flowers emit a chemical that resembles the odour produced by the female wasps for sexual attraction. The chemical is

A

pheromone

B

kinetin

C

florigen

D

cytokinin

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A
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ARIHANT NEET-SEXUAL REPRODUCTION IN FLOWERING PLANTS -ASORTED QUESTIONS
  1. Formation of embryo directly from nucellus and integument is

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  2. Despite high level of heterozygosity, the progeny derived from a seed ...

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  3. The orthid flowers emit a chemical that resembles the odour produced b...

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  4. Development of a portophyte directly from the gametophytic tissue is c...

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  5. What is the function of tapetum in a developing anther?

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  6. An orchid resembles female of an insect so as to get pollinated. The p...

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  7. Movement of pollen tube towards embryo sac is

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  8. Pollen grains are able to tolerate extremes of temperature and desicca...

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  9. Cross pollination is preferred over self pollinationn because it

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  10. During formation of pollen grains, a microspore mother cell undergoes

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  11. In a type of apomixis known as adventure embryony embryos develop dire...

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  12. Formation of more than four spores in a tetrad known as polyspory is f...

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  13. A particular species of plant produces light, non-sticky pollen in lar...

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  14. A seed that lacks endosperm. It may be

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  15. Which of these following are related with embryo sac? Oenothera type...

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  16. In microporangium, microspore tetrad are formed due to

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  17. The Ubish bodies are involved in

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  18. The hydrophilous flowers, pollinated completely under water, are known...

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  19. Pollen grains of a flower fall on the stigma of another flowers of sam...

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  20. Allogamy is very useful because it results in the

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