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The movement of pollen tube in the carpe...

The movement of pollen tube in the carpel towards the embryo sac is

A

chemotropic

B

chemotactic

C

phototropic

D

thigmotropic

Text Solution

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The correct Answer is:
A
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AAKASH INSTITUTE ENGLISH-SEXUAL REPRODUCTION IN FLOWERING PLANTS -Exercise
  1. In flowering plants the generative cell of pollen grain divides mitoti...

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  2. In general, pollen tube enter the ovule through

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  3. The movement of pollen tube in the carpel towards the embryo sac is

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  4. The precautionary measures in artificial hybridization is /are

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  5. Double fertilization was first discovered by Nawaschin (1898) in

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  6. The cells fo the endosperm are filled with reserve food material and ...

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  7. Scutellum is :

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  8. The most common type of development of endosperm is

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  9. In embryogeny of dicot plants the suspensor cell undergoes transverse ...

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  10. The remains of second cotyledon occur in some grasses it is called

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  11. Select the incorrect option w.r.t endospemic seeds

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  12. Perisperm, is found in the seeds of

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  13. Which of the following plant prduces false fruits ?

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  14. Which fo the following change does not occurs in ovary as a result of ...

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  15. Seeds of which plant were discover during the archeological excavation...

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  16. Recurrent agamospermy is seen in

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  17. Select the odd one out w.r.t polyembryony

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  18. Mark the structure which facilitates entry of oxygen and water in to t...

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  19. The nucellar embryos are apomictic embryos developed by 1)hypocotyl ...

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  20. The portion of the embryonal axis above the level of cotyledons is

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