Infants Use Hand Gestures and Facial Expressions to Communicate with Others

question 154

Multiple Choice

Infants use hand gestures and facial expressions to communicate with others by the average age of

• A)two weeks.
• B)two months.
• C)five months.
• D)nine months.

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Definitions:

Genotype

The genetic makeup of an organism, consisting of all the genes and alleles present in its DNA.

Genetic Constitution

The fundamental DNA sequence of an organism determining inherited characteristics.

Acrosomal Reaction

A process in which the enzymes of the sperm's acrosome are released to penetrate an egg and facilitate fertilization.

Epididymis

Elongated structure connected to the posterior surface of the testis, which consists of the head, body, and tail; site of storage and maturation of the spermatozoa.