AP (Advanced Placement) Biology: Questions 442 - 445 of 868

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Question number: 442

» Reproductive System & Development

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MCQ▾

Question

Identical twins are a result of

Choices

Choice (5)Response

a.

Separate fertilization of two different ova

b.

Fusion of two separately fertilized ova

c.

Division of a single fertilized ovum into two zygotes

d.

Double fertilization of a single ovum

e.

Division of a single ovum with each daughter cell fertilized separately

Question number: 443

» Reproductive System & Development

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MCQ▾

Question

The purpose of the acrosome on the tip of sperm cells is

(1) To provide the energy to burrow through the zona pellucid

(2) To provide the molecular sensors for chemotaxis to the ovum

(3) To provide enzymes that permit tunneling through the zona pellucida

(4) To provide the energy required to move the flagellum toward the ovum

Choices

Choice (5)Response

a.

1 and 2

b.

1 and 4

c.

2 and 4

d.

2 and 3

e.

Question does not provide sufficient data or is vague

Question number: 444

» Reproductive System & Development

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MCQ▾

Question

Sperm are formed in the

Choices

Choice (5)Response

a.

Prostate gland

b.

Seminiferous tubules

c.

Epididymis

d.

Vas deferens

e.

None of the above

Question number: 445

» Reproductive System & Development

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MCQ▾

Question

A newborn infant has an immature immune system but is initially protected by

Choices

Choice (5)Response

a.

Antibodies passed on from the mother through the placenta

b.

Maternal macrophages occupying fetal lymph nodes

c.

Antibody-producing cells acquired during the birth process from the umbilical cord

d.

Helper T cells passed on from the mother through the placenta

e.

Antibodies passed on from the mother in her breast milk

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