Biology Class 12 NCERT Solutions: Chapter 3 Human Reproduction Part 1 (For CBSE, ICSE, IAS, NET, NRA 2023)
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Q. 1 Fill in the blanks:
(a) Humans reproduce ________. (asexually/sexually)
Answer: Humans reproduce sexually.
(b) Humans are________. (oviparous/viviparous/ovoviviparous)
Answer: Humans are viviparous.
(c) Fertilization is ________ in humans. (external/internal)
Answer: Fertilization is internal in human.
(d) Male and female gametes are ________. (diploid/haploid)
Answer: Male and female gametes are haploid
(e) Zygote is ________. (diploid/haploid)
Answer: Zygote is diploid.
(f) The process of release of the ovum from a mature follicle is called________.
Answer: The process of release of the ovum from a mature follicle is called ovulation.
(g) Ovulation is induced by a hormone called the ________.
Answer: Ovulation is induced by a hormone called the luteinizing hormone.
(h) The fusion of the male and the female gametes is called ________.
Answer: The fusion of the male and the female gametes is called fertilization
(i) Fertilization takes place in the ________.
Answer: Fertilization takes place in the fallopian tube
(j) The zygote divides to form ________, which is implanted in uterus.
Answer: The zygote divides to form blastocyst, which is fertilization implanted in uterus.
(k) The structure which provides vascular connection between the fetus and uterus is called ________.
Answer: The structure which provides vascular connection between the fetus and uterus is called placenta.
Q. 2 Draw a labeled diagram of male reproductive system.
Answer:
