Biologia - Scuola secondaria di secondo grado Immagini e concetti della biologia 2ed Immagini e concetti della biologia 2ed / Dalle cellule agli organismi Chapter C11. La riproduzione e lo sviluppo

Chapter C11. La riproduzione e lo sviluppo

10 esercizi

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Human reproductive systems

In human males, sterility results when the testes are located inside the abdominal cavity instead of in the scrotum because

A: the sperm cannot pass through the vas deferens.

B: sperm production is inhibited at body temperature.

C: the sperm cannot travel the extra distance.

D: digestive juices destroy the sperm.

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How animals reproduce

The evolutionary significance of the placenta is that it allowed

A: animals to retain their eggs until they hatched.

B: offspring to be born in an immature state and then develop outside the mother.

C: offspring to exchange materials with the mother while developing inside the mother.

D: mammals to develop the ability to produce milk.

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Early developmental stages and processes

Which of the germ layers is best associated with development of the heart?

A: ectoderm

B: mesoderm

C: endoderm

D: neurula

E: All of these are correct.

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Early developmental stages and processes

Which process refers to the shaping of the embryo and involves cell migration?

A: cleavage

B: differentiation

C: growth

D: morphogenesis

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Early developmental stages and processes

Which of these stages is mismatched?

A: cleavage—cell division

B: blastula—gut formation

C: gastrula—three germ layers

D: neurula—nervous system

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Early developmental stages and processes

Gastrulation is influenced by the

A: nervous system.

B: amount of yolk.

C: environment.

D: presence of hormones.

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Human reproductive system

Which of the following is not an event of the ovarian cycle?

A: FSH promotes the development of a follicle.

B: The endometrium thickens.

C: The corpus luteum secretes progesterone.

D: Ovulation of an egg occurs.

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Human reproductive systems

The release of the oocyte from the follicle is caused by

A: a decreasing level of estrogen.

B: a surge in the level of follicle-stimulating hormone.

C: a surge in the level of luteinizing hormone.

D: progesterone released from the corpus luteum.

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Early developmental stages and processes

In humans, the fetus

A: has four extraembryonic membranes.

B: has developed organs and is recognizably human.

C: is dependent upon the placenta for excretion of wastes and acquisition of nutrients.

D: All of these are correct.

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Early developmental stages and processes

In human development, which part of the blastocyst develops into a fetus?

A: morula

B: trophoblast

C: inner cell mass

D: chorion

E: yolk sac

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