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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
Mention the function of Seeds.
When pregnancy does not occur, the life of corpus luteum is about ______.
Name the following:
The part where the sperms are produced in the testes
Differentiate between the following pair:
Efferent duct and sperm duct
Differentiate between:
Semen and sperm
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.
Name the following:
Fusion of sperm and ovum.
Give the functions of the following:
Fallopian tube
Write in sequence the regions in which a mature sperm travels from the seminiferous tubules up to the urethral opening?
Where does fertilization occur?
Name the female sex hormones and structures which secrete them.
Give Technical Term:
The place where fertilization occurs in the female reproductive system.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
The process of fusion of the sperm nucleus and the egg nucleus is termed implantation.
Write the functional activity of the following structure:
Seminal vesicles
Multiple Choice Question:
Ovulation in mammals is a process in which
The enzyme involved in penetration of sperm into ovum is ______.
Sperms undergo the following changes in the epididymis EXCEPT ______
State whether the following statement is True or False. If false, correct the statement:
Human egg has a head, middle piece and tail.
Give any four significances of fertilization in humans.
