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The condition, under which Dophnia repro...

The condition, under which Dophnia reproduces parthenogenetically is

A

in summer, when food is abundant in pond

B

in winter in lack of sufficient food

C

in reduced oxygen content

D

in cold temperature

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ARIHANT NEET-SEXUAL REPRODUCTION IN FLOWERING PLANTS -ASORTED QUESTIONS
  1. In an embryo sac, the cells that degenerate after fertilisation are

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  2. At what stage embryo sac is ready for fertilisation?

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  3. The condition, under which Dophnia reproduces parthenogenetically is

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  4. A pollinium consists of

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  5. Autogamy can occur in a chasmogamous flower if

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  6. From among the situations given below, choose the one that prevents bo...

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  7. A dicotyledonous plant bears flowers but never produces fruits and see...

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  8. In a fertilised embryo sac, the haploid, diploid and triploid structur...

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  9. The male gametes of angiosperms are

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  10. After penetrating stigmtic and stylar tissue, the pollen tube usually ...

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  11. At which stage, one can distinguish between nuclear and cellular type ...

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  12. While planning for an articifical hybridisation programmme involving d...

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  13. There are at lest two families where the product of double fertilisati...

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  14. The sequence of development during the formation of endosperm is

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  15. Choose the correct statement from the following.

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  16. Even after killing the generative cell with a laser beam, the pollen g...

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  17. Pollen grains that would easily germinate on stigma are found to germi...

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  18. In angiospermsm, each pollen grain produces to male cells. What do the...

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  19. IN Tape Grass (= Vallisneria )

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  20. A botanist treated some pollen grains with enzymes, chemical and high ...

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