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प्रश्न
How can plants and animals save themselves from extinction?
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
When pregnancy does not occur, the life of corpus luteum is about ______.
Differentiate between the following pair:
Efferent duct and sperm duct
Rewrite the terms in the correct order so as to be in a logical sequence.
coitus, ovum, Sperm, sperm duct, urethra, Vagina.
Differentiate between:
Semen and sperm
Choose the correct answer:
Virgin birth is called ______________
What happens to uterus if fertilization takes place? And what happens to uterus if fertilization does not take place?
Name the following:
Virgin birth
What are the functions of testes?
Name the female sex hormones and structures which secrete them.
Give Reasons
A large number of sperms are required for fertilizing one egg.
Differentiate
External fertilization and Internal fertilization.
Name the Following
The basic unit of the testes.
Give Technical Term:
How much semen is discharged per ejaculation in a man?
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Sperm is a highly motile male gamete.
Answer the following question.
What is capacitation? Give its importance.
Sperms undergo the following changes in the epididymis EXCEPT ______
Which of the following is the first cell of human life?
Give any four significances of fertilization in humans.
What are the functions of each hormone in the neurohypophyseal hormone?
Choose the odd one out from the group of terms given below and write the category for the remaining terms:
