Which structure contains lysosomal-like enzymes?

Correct Answer: C

Rationale: The correct answer is C: acrosome. Lysosomal-like enzymes are found in the acrosome of sperm cells, where they help in breaking down the outer layers of the egg during fertilization. Sertoli cells (A) provide nourishment and support for developing sperm cells. The sperm head (B) contains genetic material but not lysosomal-like enzymes. The sperm tail (D) is responsible for movement and does not contain lysosomal-like enzymes. Therefore, the acrosome (C) is the structure that specifically houses these enzymes for the fertilization process.

Correct Answer: B

Rationale: The correct answer is B: myometrium. The myometrium is the muscular layer of the uterus responsible for contractions during labor and menstruation. It is the largest component of the uterus by weight due to its thick and muscular nature. The broad ligament (A) is a sheet of peritoneum that supports the uterus and other pelvic organs. The round ligament (C) helps support the uterus and is not as significant in weight compared to the myometrium. The endometrium (D) is the inner lining of the uterus that thickens and sheds during the menstrual cycle, but it is not the largest component by weight.

Correct Answer: C

Rationale: The correct answer is C: pituitary. Estrogen is primarily produced by the ovaries, with a small amount also coming from the adrenal glands. The pituitary gland is not a direct source of estrogen production but plays a role in regulating the release of hormones that stimulate estrogen production in the ovaries. The follicle, on the other hand, is a structure within the ovary where estrogen is produced during the menstrual cycle. Therefore, C is the correct answer as the pituitary gland does not directly produce estrogen.

Correct Answer: C

Rationale: The correct answer is C: second month of pregnancy. During the second month of pregnancy, HCG levels typically peak and reach their highest levels. This is because HCG is produced by the placenta, which develops and grows rapidly during this stage of pregnancy. Higher HCG levels during this time help support the developing fetus and maintain the pregnancy. A: before pregnancy - HCG levels are not present before pregnancy. B: first days of gestation - HCG levels are detectable shortly after implantation, but they continue to rise and peak in the second month. D: end of pregnancy - HCG levels typically decrease towards the end of pregnancy as the placenta matures and other hormones take over to support the pregnancy.

Correct Answer: A

Rationale: The correct answer is A: Goat. Viviparous animals give birth to live young instead of laying eggs. Goats fall under this category as they give birth to live kids. Ducks (B) are oviparous, laying eggs. Crocodiles (C) are also oviparous, laying eggs. Choice D is incorrect as goats are viviparous animals.