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प्रश्न
How can plants and animals save themselves from extinction?
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उत्तर
Genetic variation helps the organisms to adjust with the changing environment and thereby to maintain their existence. Due to this, plants and animals can save themselves from being extinct.
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संबंधित प्रश्न
Give the significance of fertilization.
Name the following:
The fully developed part of the ovary containing a mature egg.
Rewrite the correct statement by changing the last one word if these statement is false.
Pregnancy in women can be prevented by the method of vasectomy.
Complete the following statement by choosing the correct alternative:
Fertilization occurs in ______.
Define the following:
Ovulation
What are the functions of testes?
Write in sequence the regions in which a mature sperm travels from the seminiferous tubules up to the urethral opening?
Name two essential structures which take part in fertilization.
Give Reasons
The urethra is also called urinogenital duct.
Differentiate
Isogametes and Heterogametes.
Explain the term Cowper’s glands.
Give Technical Term:
A method of contraception in which the sperm duct is cut and ligated.
Write the functional activity of the following structure:
Prostate gland
Answer the following question.
What is capacitation? Give its importance.
Describe the process of fertilization.
Which of the following is the first cell of human life?
In markets, eggs of birds are available but never eggs of dogs. why?
State whether True or False:
The chromosome number in germ cells producing the gametes are diploid.
Fertilization takes place in ______.
