Question

Find the correct options.

(a) Testosterone influences male secondary sexual characters.

(B) Gestation period in Rabbit is about 276 days.

(c) The bulbourethral gland secretes a vaginal lubricant.

(d) Placenta secretes estrogen.

(A) b, c

(B) c, d

(C) a, d

(D) a, b

Answer 1

Gestation period is defined as the time period at which the mother carries its offspring embryo or the fetus in itself. It varies from one organism to another. Testosterone is the hormone in the male which helps in the formation of testis and to develop sexual characteristics. Placenta develops in the uterus at the time of pregnancy. Bulbourethral gland is an exocrine gland located near the urethra.

Complete Answer:

(a) Testosterone is the male sexual hormone that helps in the production of male sexual gamete, sperm and it influences the secondary sexual characteristics like the growth of facial hairs, broadening of shoulders, hardening of voice etc.

(b) For rabbits, the period in which the mother carries its young one in itself is about 31 - 33 days. The length of pregnancy in the rabbit is 31 days and the doe can produce from 1 to 12 young each time she gives birth.

(c) Bulbourethral gland secretes only the lubricant of the penis not the vagina.

(d) Placenta secretes hormones like progesterone, gonadotropin, human placental lactogenic etc.

From the above explanation, it is clear that option (B) and (C) are wrong.

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Thus, the option (C) is correct.

Note: Placenta is the organ which is more important for the growth and development of the baby inside the mother. This is because the oxygen and nutrients are supplied to the baby by this placenta. It also used to remove the waste product from the baby. This placenta is attached to the uterus of the woman.