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Offspring formed due to sexual reproduct...

Offspring formed due to sexual reproduction have better chances of survival. Why ?

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(i) Secual repoduction introduction variations in offspring , hence of evolutionary significance.
(ii) It helps the offsping to adjust according to change in environment .
(iii) As a result of new character combination , better offspring are produced thus result in the better varieties.
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Offspring formed due to sexual reproduction referred to as clone ?

Given below are few statements related to external fertilization . Choose the correct statement . i. The male and femle gamtes are formed and relased simulatneously ii. Only a few gameter are released into the medium iii. water is the medium in a majority of organisms exhibiting external fertilization . iv. offspring formed as a result of extermal fertilization have better chance of survival than formed inside an organism.

Given below are a few statements related to external fertilisation. Choose the correct statements. (i) The male and female gametes are formed and released simultaneously. (ii) Only a few gametes are released into the medium. (iii) Water is the medium in a majority of organisms exhibiting external fertilisation. (iv) Offspring formed as a result of external fertilisation have better chance of survival than those formed inside an organism.

Offspring formed by sexual reproduction exhite more variation than those formed by asexual reproduction because :

Offspring formed by asexual method of reproduction have greater similarity among themselves because (i) Asexual reproduction involves only one parent (ii) Asexual reproduction does not involve gametes (iii) Asexual reproduction occurs before sexual reproduction (iv) Asexual reproduction occurs after sexual reproduction

What is a clone? Why do offsprings formed by asexual reproduction exhibit remarkable similarity?

MODERN PUBLICATION-REPRODUCTION IN ORGANISMS-NCERT FILE (EXERCISE QUESTIONS)
  1. Why is reproduction essential for organisms?

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  2. Which is a better mode of reproduction : sexual or asexual ? Why ?

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  3. Why is the offspring formed by asexual reproduction referred to as clo...

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  4. Offspring formed due to sexual reproduction have better chances of sur...

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  5. How does the progeny formed from asexual reproduction differ from thos...

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  6. Distinguish between asexual and sexual reproduction. Why is vegetati...

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  7. What is vagetative propagation ? Give two suitable examples.

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  8. Define : (i) Juvenile phase, (ii) Reproductive phase, (iii) Senescent ...

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  9. Higher organisms have resorted to sexual reproduction in spite of its ...

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  10. Explain why meiosis and gametogenesis are always interlinked?

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  11. Identify each part and write whether it is haploid (n) or diploid (2n)...

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  12. Define external fertilization. Mention its disadvantages.

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  13. Differentiate between a zoospore and zygote.

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  14. Differentiate between Gametogensis and Embryogensis.

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  15. Describe the post-fertilization changes in a flower.

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  16. What is a bisexual flower? Collect five bisexual flowers from your nei...

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  17. Examine a few flowers of any cucurbit plant and try to identify the st...

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  18. Why offspring oviparous animals are at a greater risk ?

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