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It is observed that simple organisms lik...

It is observed that simple organisms like algae and fungi normally reproduce asexually but before the onset of adverse conditions they shift to sexual reprodction, It is so because sexual reproduction

A

sexual, asexual, sexual

B

asexual, sexual, asexual

C

asexual, sexual, sexual

D

sexual, asexul, asexual

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The correct Answer is:
c
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Why do algae and fungi shit to sexual mode of reproduction just before the onset of adverse conditions?

Fill in the blanks: (1) The. .. . . A .. . . Reproduction is the common mode of reproduction in organisms that have a relatively simple organisatio like algae and fungi and they shift to . . . .. . B. . . Method of reproduction just before the onset of adverse conditions. (2) Asexual (Vegetative) as well as sexual modes of reproduction are exhibited by the . . ... ..c . . . . . (3) Only sexual mode of reproduction is present in most of the . .. .. . ..d. .... . . .

Assertion : Algae and fungi switch to asexual method of reproduction before the onset of adverse conditions. Reason : Asexual reproduction may introduce variations and leads to the formation of many clones.

(A) Why do organisms like algae and fungi shift from asexual mode of reproduction to sexual mode ? (b) What is a juvenile phase in organisms ?

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

NCERT FINGERTIPS-REPRODUCTION IN ORGANISM-Reproduction In Organism
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  2. The uniparental reproduction is called reproduction while biparental ...

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  3. It is observed that simple organisms like algae and fungi normally rep...

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  4. Sexual reproduction is considered more beneficial than asexual reprodu...

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  5. The growth phase of an organism before attaining sexual maturity is re...

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  11. Which of the following animals show menstrual cycle ?

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  14. Senescent phase of an organism's life span can be recognised by

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  15. The events in sexual reproduction are (i) pre-fertilisation (ii)fe...

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  16. Refer to the given diagrams showing different types of syngamy and sel...

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  17. Which of the following options is correct for the given figures ?

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  18. Refer the following figures and identify the type of gametes (A, B and...

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  19. If a fungal thallus has both male and female reproductive structures, ...

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