Zack and Adrien Are Brothers

question 1

Multiple Choice

Zack and Adrien are brothers.Zack is older and is about 2 inches taller than Adrien.What could be a possible explanation for their height difference?

• A) The brothers have experienced different parenting styles from their mother.
• B) Adrien received better care as an infant than Zack.
• C) Zack received better care as an infant than Adrien.
• D) Their differences in height are probably related to their differing genes.

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Definitions:

Scrotum

The pouch of skin that hangs below the penis in males, housing the testicles and parts of the spermatic cord, playing a role in temperature regulation for sperm production.

Prostate

A gland in male mammals surrounding the neck of the bladder and urethra, involved in the production of seminal fluid.

Anus

The terminal end of the digestive tract where feces are expelled from the body.

Azoospermia

A medical condition characterized by the absence of sperm in the semen.