ہوم / مشق / ایم ڈی کیٹ / حیاتیات / تولید اور نشوونما
9 سوالات: ایم ڈی کیٹ حیاتیات، جوابات اور وضاحت کے ساتھ۔
Fertilisation in humans normally takes place in the:
درست جواب: Fallopian tube
The sperm usually meets the egg in the upper part of the fallopian tube.
Which hormone from the corpus luteum maintains the lining of the uterus?
درست جواب: Progesterone
Progesterone keeps the endometrium thick and ready for implantation.
The surge of luteinising hormone (LH) triggers:
درست جواب: Ovulation
A sharp rise in LH around the middle of the cycle makes the mature follicle release the egg.
In males, spermatogenesis occurs in the:
درست جواب: Seminiferous tubules
Sperm are made in the coiled seminiferous tubules of the testes.
How many sperm cells are formed from one primary spermatocyte?
درست جواب: 4
Meiosis I and II give four haploid cells, and each becomes a sperm.
How many functional egg cells come from one primary oocyte?
درست جواب: 1
Divisions of an oocyte are uneven. Only one large egg forms and the other cells are small polar bodies.
Double fertilisation is a feature of:
درست جواب: Angiosperms
In flowering plants one sperm fertilises the egg and the other joins the central cell.
In flowering plants, the endosperm forms when a sperm nucleus fuses with:
درست جواب: Two polar nuclei
A sperm nucleus fuses with the two polar nuclei, giving a triploid endosperm tissue that feeds the embryo.
Which hormone is detected by a standard pregnancy test?
درست جواب: hCG
Human chorionic gonadotropin (hCG) is made by the developing placenta and appears in the urine of pregnant women.