Justin and Jacob Are Identical Twins

question 14

Multiple Choice

Justin and Jacob are identical twins. They are the result of:

• A) One ovum fertilized by one sperm that split into two zygotes.
• B) Two separate ova that were fertilized by two different sperms.
• C) One ovum that was fertilized by two sperms.
• D) Two ova that were fertilized by one sperm.

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Definitions:

Medium Veins

Veins that are larger than venules but smaller than the large veins, carrying blood back towards the heart and often accompanying medium arteries.

Large Veins

Blood vessels that carry blood towards the heart, characterized by their large diameter compared to other venous structures.

Atherosclerosis

A condition characterized by the hardening and narrowing of the arteries due to the buildup of plaque, which can restrict blood flow.

Tunica Intima

The innermost layer of a blood vessel, which lines the lumen of vessels and is composed of a thin layer of endothelial cells.