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Although sexual reproduction is a long d...

Although sexual reproduction is a long drawn, energy-intensive complex form of reproduction, many groups of organisms in kingdom- Animalia and Plantae prefer this mode of reproduction. Give atleast three resaons for this.

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(a) Sexual reproduction brings about variation in the offspring
(b) Since gamete formation is preceded by meiosis, genetic recombination
occurring during crossing over (meiosis - ). leads to a great deal variation in the DNA of gametes.
(c) The organism has better chances survival in a changing environment Embryo sacs of some apomictic species appear normal but conta diploid cells. Suggest a suitable explanation for the condition.
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TRUEMAN BIOLOGY-REPRODUCTION-SECTION-D
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  4. Describe in sequence the events that lead to the development of a 3-ce...

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

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

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

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  11. Give examples for physical and surgical contraceptive methods.

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

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

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  14. Describe the structure of blastula.

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