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Mention two events that are inhibited by...

Mention two events that are inhibited by the intake of oral contraceptive pills to prevent pregnancy in humans.

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The oral pills inhibit the secretion of FSH and LH that prevent ovulation They also prevent implantation and alter the quality of cervical mucus to prevent or retard entry of sperms .
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TRUEMAN BIOLOGY-REPRODUCTION-SECTION-D
  1. Mention two events that are inhibited by the intake of oral contracept...

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  2. A woman has conceived and implantation has occurred in her uterus. Exp...

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  3. "Incompatibility is a natural barrier in the fusion of gametes". Justi...

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

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  5. Draw a schematic diagram of a human sperm and label the cellular compo...

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  6. (a)Give a schematic representation of spermatogenesis in humans . (b...

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  7. Explain with the help of a diagram the development of a mature embryo ...

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

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  9. When and where in the body is oogenesis completed?

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  10. (a) How is the placenta connected to the embryo? (b ) Placenta acts ...

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

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  12. 2 difference between cross pollination and self pollination

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  13. Draw a labelled diagram of the structure of mature dicot embryo.

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

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

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

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  17. Embryo sacs of some apomitic species appear normal but contain diploid...

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  18. Meiotic division during oogenesis is different from that in spermatoge...

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  19. Enumerate and describe any five reasons for introducing sex education ...

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

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  21. Describe the stage in embryo development in a dicot plant.

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