AP (Advanced Placement) Biology: Questions 441 - 443 of 902

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Question 441

Question

MCQ▾

Which of the following is the best description of the allantois?

Choices

Choice (5)Response

a.

The extraembryonic membrane that forms the bladder

b.

The extraembryonic membrane that supports fetal development

c.

The vessel that carries blood from the placenta to the fetus

d.

Remnants of membranes and placenta

e.

All of the above

Question 442

Question

MCQ▾

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 443

Question

MCQ▾

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

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