Reproductive System — Important Questions
ICSE · Class 10 · Biology
44 important questions from Reproductive System for ICSE Class 10 Biology, with answers. Written for the board exams 2027.
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Which of the following are functions of the placenta?
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Exchange of gases, Transfer of nutrients, Hormone secretion
The placenta facilitates gas exchange, nutrient transfer between mother and fetus, and secretes hormones like hCG, estrogen, and progesterone. It does not produce sperm or store urine.
The male reproductive system produces both sperm and hormones.
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True
True. The male reproductive system produces sperm in seminiferous tubules and testosterone hormone in Leydig cells, both functions occurring in the testes.
Which part of the sperm contains enzymes to penetrate the ovum?
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Acrosome
The acrosome at the tip of sperm head contains hyaluronidase enzyme that helps dissolve the protective layer around the ovum during fertilization.
How long is the typical menstrual cycle in humans?
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28 days
The menstrual cycle in human females is repeated at regular intervals of about 28 days, from puberty until the age of 45-50 years, unless pregnancy occurs. This cycle includes the menstrual, follicular, ovulatory and secretory phases, with ovulation occurring around the 13th or 14th day. The other options (21, 35, 40 days) do not match the standard cycle length described for humans.
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