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Movement of pollen tube towards embryo s...

Movement of pollen tube towards embryo sac is

A

thigmotactic

B

thermotactic

C

chemotropic

D

phototropic

Text Solution

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The correct Answer is:
C
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TRUEMAN BIOLOGY-SEXUAL REPRODUCTION IN FLOWERING PLANTS-MULTIPLE CHOICE QUESTIONS
  1. In angiosperms, triple fusion produces

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  2. In angiosperm, syngamy or true fertilization refers to

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  3. Movement of pollen tube towards embryo sac is

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  4. Germination of pollen grain on the stigma is

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  5. At the time of entering embryo sac the pollen tube contains

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  6. Doubles fertilization is fusion of

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  7. Route used by pollen tube for entering ovule is

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  8. The significance of double fertilization is that it

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  9. The second fertilization in angiosperms is known as

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  10. Entry of pollen tube through micropyle while reaching the embryo sac...

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  11. When pollen tube enters by integuments then the process is called

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  12. In angiosperms, pollen tube liberates its male gametes into:

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  13. Total number of nuclei involved in double fertilization is

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  14. Pollen tube enters the embryo sac usually

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  15. Development of embryo in angiosperm is

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  16. The wheat grain/maize grain has an embryo with one, large, shield shap...

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  17. Pollination is stimulus necessary for the fruit development. It can be...

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  18. Ovule integument gets transformed into

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  19. Endosperm in angiosperms is formed from secondary nucleus

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  20. Endosperm of angiosperms is different from that of gymnosperms becaus...

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