Identify the correct statements.
A. Oogenesis is initiated at puberty
B. Second meiotic division in secondary oocyte occurs in the ovary.
C. Middle piece of sperm provides energy for movement.
D. Fertilization of gametes occur in the ampulla isthmic region of oviduct.
E. Myometrium helps in muscular contractions of the uterus.
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → C, D, E only
A. Oogenesis is initiated at puberty — Incorrect. Oogenesis begins during embryonic development, when oogonia form in the foetal ovary. It is spermatogenesis that begins at puberty.
B. Second meiotic division in secondary oocyte occurs in the ovary. — Incorrect. The second meiotic division is completed in the fallopian tube, when a sperm enters the ovum, not in the ovary.
C. Middle piece of sperm provides energy for movement. — Correct. The middle piece has many mitochondria, which produce energy for the movement of the tail.
D. Fertilization of gametes occur in the ampulla isthmic region of oviduct. — Correct. Fertilisation can take place only if the ovum and sperms reach the ampullary-isthmic junction together.
E. Myometrium helps in muscular contractions of the uterus. — Correct. The myometrium is the thick layer of smooth muscle of the uterus. It shows strong contractions during the delivery of the baby.