Reproduction in Lower and Higher Animals — Important Questions
Maharashtra Board · Class 12 · Biology
45 important questions from Reproduction in Lower and Higher Animals for Maharashtra Board Class 12 Biology, with answers.
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Important Questions from Reproduction in Lower and Higher Animals
Which of the following are primary sex organs in humans?
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Testes, Ovaries
Primary sex organs (gonads) are testes in males and ovaries in females as they produce gametes and hormones. Penis and uterus are secondary sex organs.
Which structures are formed during spermatogenesis?
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Primary spermatocytes, Secondary spermatocytes, Spermatids, Spermatozoa
Spermatogenesis involves formation of primary spermatocytes, secondary spermatocytes, spermatids, and finally spermatozoa. Primary oocytes are formed during oogenesis, not spermatogenesis.
Fertilization in humans normally occurs in:
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Ampulla of fallopian tube
Human fertilization occurs in the ampulla (widest part) of the fallopian tube where the sperm meets and fertilizes the ovum.
Which of the following are functions of the placenta?
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Oxygen supply to fetus, Nutrient supply to fetus, Waste removal from fetus, Hormone production
The placenta serves multiple functions including gas exchange, nutrient transfer, waste removal, and hormone production (hCG, progesterone, estrogen). It does not produce sperm.
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