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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.
One egg is released from each of the two ovaries every month.
Give appropriate term of the following:
The attachment of developing zygote (blastocyst) on the uterine wall.
Give the functions of the following:
Fallopian tube
What are the functions of testes?
Give Reasons
The oviduct funnel is lined with cilia.
Differentiate
Isogametes and Heterogametes.
Differentiate between tubectomy and vasectomy.
Complete the following sentences with appropriate word:
Fertilization of the human egg by the sperm normally occurs in the_______
Identify the function of fertilization membrane.
Fertilization of the ovum generally takes place in the ______.
What are autosomes chromosomes?
Explain tubectomy and vasectomy.
During copulation, approximately how much semen containing how many spermatozoa is deposited in the vagina?
What percentage of sperm are demobilized or destroyed in the vagina during capacitation?
What is the location and nature of antifertilizin?
Which enzyme dissolves the hyaluronic acid between corona radiata cells and the zona pellucida?
What is karyogamy, also known as amphimixis?
What structures surround the ovum and aid in its protection and fertilization?
