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Describe the head region in human sperm....

Describe the head region in human sperm.

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TRUEMAN BIOLOGY-REPRODUCTION-SECTION-D
  1. "Incompatibility is a natural barrier in the fusion of gametes". Justi...

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  2. Show diagrammatically the stages of embryonic development from zygote ...

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  3. Describe the head region in human sperm.

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  4. (a) At which stage of life does gametogenesis begin in human male and ...

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  5. Mention the ploidy of the following: a) Megaspore mother cell. b) ...

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  6. Study the flow chart given below . Name the hormones involved at each ...

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  7. Define Oogenesis. When and where in the body is oogenesis completed?

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  8. Mention any two sexually transmitted diseases in human and its causiti...

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  9. Give reasons why: (i) Most zygotes in angiosperms divide only afte...

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  10. Describe in sequence the events that lead to the development of a 3-ce...

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  11. (a ) Trace the development ofmegaspore mother cell up to the formation...

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  12. (a ) Draw a labelled longisectional view of an albuminous 'seed'· (b...

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  13. Describe the post-zygotic events leading to implantation and placenta ...

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  14. Although sexual reproduction is a long drawn, energy-intensive complex...

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  15. Embryo sacs of some apomictic species appear normal but contain diploi...

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  16. Describe oestrous cycle. In which group of animals is it observed.

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  17. Give examples for physical and surgical contraceptive methods.

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  18. The following is the illustration of the sequence of ovarian events (a...

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  19. Mention the function of Synergids and polar nuclei in embryo sac.

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  20. Describe the structure of blastula.

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