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What are the advantages of using mechani...

What are the advantages of using mechanical barriers during the sexual act?

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Benefits of using mechanical barriers during sexual act are:
i] It creates a barrier so that sperm does not reach the egg, thus it avoids unwanted pregnancy.
ii] Use of barriers also protects a person from sexually transmitted diseases as gonnorhea, AIDS, etc.
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ZEN PUBLICATION-HOW DO ORGANISMS REPRODUCE?-ZEN ADDITIONAL QUESTIONS SECTION (SHORT ANSWER [SA] TYPE 1 QUESTIONS)
  1. What would have been the result if there were to be vegetative propaga...

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  2. Asexual reproduction in yeast is a boon to food industry. Justify.

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  3. What is the need for plants to have both sexual and asexual means of r...

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  4. Is vegetative reproduction a boon to farmers? Justify. OR List the...

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  5. List the advantages of tissue culture.

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  6. Explain the structure of a typical flower.

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  7. List the secondary sexual characters observed in girls.

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  8. List the secondary sexual characters observed in boys.

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  9. Explain the menstrual cycle.

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  10. Write two examples each of sexually transmitted diseases caused by (i)...

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  11. In tobacco plant, the male gametes have twenty four chromosomes. What ...

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  12. Colonies of yeast fail to multiply in water, but multiply in a surgar ...

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  13. In a bisexual flower inspite of the young stamens being removed artifi...

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  14. Draw a labelled diagram in proper sequence to show budding in hydra.

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  15. A student is viewing under a microscope a permanent slide showing vari...

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  16. Is cell division a type of reproduction in unicellular organisms? Just...

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  17. Why cannot fertilisation take place in flowers if pollination does not...

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  18. With the help of a neat diagram, illustrate a] spore formation in rh...

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  19. What changes occur in the uterus if fertilization does not occur? OR...

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  20. What are the advantages of using mechanical barriers during the sexual...

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