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(a ) Draw a labelled longisectional view...

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

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(b) (i)Seeds have better adaptive strategies for dispersal to new habitats and help the species to colonise in other areas.
(ii)They have enough food material in them which nourishes the seedlings till they are capable of photosynthesis.
(iii) The hard seed coat provides protection to young embryo.
(iv) Being products of sexual reproduction they generate new genetic combination leading to variations
(v) Since reproductive processes such as pollination and fertilisation are independent of water, seed formation is more dependable
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TRUEMAN BIOLOGY-REPRODUCTION-SECTION-D
  1. When and where in the body is oogenesis completed?

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

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

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  4. 2 difference between cross pollination and self pollination

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

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

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

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

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

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

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

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

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

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  14. Where is morula formed in humans? Explain the process of its developme...

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  15. Mention the fate of all the components of the embryo sac after fertili...

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  16. (a) Draw a diagrammatic sectional view of a mature anatropous ovule an...

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  17. (a) Draw a diagrammatic sectional view of the female reproductive syst...

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  18. (a) Draw a labelled schematic diagram of the transverse section of a m...

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  19. Write two differences between spermtogenesis and oogenesis

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  20. (a) Draw a diagram of a mature embryo sac of an angiosperm and label t...

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