Question 1

Which of the following is a key evolutionary advantage of sexual reproduction over asexual reproduction?

Accepted Answer

It increases genetic diversity, enhancing adaptability to changing environments.

Question 2

Which statement best describes hermaphroditism in animals?

Accepted Answer

Individuals possess both male and female reproductive organs and can produce both types of gametes.

Question 3

Which of the following correctly matches the reproductive strategy with its description?

Accepted Answer

Ovoviviparity: Embryo develops in an egg inside the mother but is nourished by the egg yolk.

Question 4

During spermatogenesis in humans, which hormone is primarily responsible for stimulating the production of sperm in the seminiferous tubules?

Accepted Answer

Follicle-stimulating hormone (FSH)

Question 5

Which of the following best describes the role of the corpus luteum in the human female reproductive cycle?

Accepted Answer

It secretes estrogen and progesterone to maintain the endometrium.

Question 6

A patient has a mutation that prevents the secretion of gonadotropin-releasing hormone (GnRH) from the hypothalamus. Which of the following would most likely be observed?

Accepted Answer

Reduced stimulation of the anterior pituitary, leading to low FSH and LH levels.

Question 7

Which event directly triggers ovulation in the human female reproductive cycle?

Accepted Answer

A surge in luteinizing hormone (LH) levels.

Question 8

Which of the following best explains why asexual reproduction is advantageous in stable environments?

Accepted Answer

It produces offspring rapidly without the need for a mate, maintaining successful traits.

Question 9

In the context of embryonic development, what is the primary outcome of gastrulation?

Accepted Answer

Establishment of three germ layers: ectoderm, mesoderm, and endoderm.

Question 10

Which hormone is primarily responsible for maintaining the endometrial lining during the luteal phase of the menstrual cycle?

Accepted Answer

Progesterone

Question 11

A researcher observes an animal species in which individuals can self-fertilize and also mate with others. Which reproductive strategy is most likely being observed?

Accepted Answer

Hermaphroditism

Question 12

Which of the following best describes the function of homeotic genes during embryonic development?

Accepted Answer

They control the pattern and placement of body structures along the anterior-posterior axis.

Question 13

During which trimester of human pregnancy does organogenesis primarily occur?

Accepted Answer

First trimester

Question 14

Which of the following is a direct result of the fertilization process in animals?

Accepted Answer

Formation of a diploid zygote.

Question 15

A woman’s menstrual cycle is disrupted due to low estrogen levels. Which of the following is a likely consequence?

Accepted Answer

The endometrial lining will not thicken properly.

Question 16

Which of the following best explains why internal fertilization is an evolutionary trend in terrestrial vertebrates?

Accepted Answer

It increases the likelihood of successful fertilization in dry environments.

Question 17

Which of the following events occurs during the process of cleavage in embryonic development?

Accepted Answer

The zygote undergoes rapid mitotic divisions without increasing in overall size.

Question 18

A patient is found to have a nonfunctional anterior pituitary gland. Which of the following reproductive hormones would be most directly affected?

Accepted Answer

Follicle-stimulating hormone (FSH) and luteinizing hormone (LH)

Question 19

Which of the following best describes the role of oxytocin during human labor?

Accepted Answer

It triggers uterine contractions to facilitate childbirth.

Question 20

A genetic mutation causes a failure in the formation of the mesoderm during gastrulation. Which of the following structures would most likely be absent or severely malformed in the developing embryo?

Accepted Answer

Muscles and the circulatory system

Reproduction and Embryonic Development: General Biology Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard