When Does a Zygote Become a Multicellular Creature

question 6

Multiple Choice

When does a zygote become a multicellular creature?

• A) at fertilization
• B) when cleavage begins
• C) when organs begin to form
• D) when the heart begins beating
• E) at birth

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Definitions:

Autonomic Systems

Autonomic systems refer to the part of the nervous system that controls involuntary bodily functions, including heart rate, digestion, and respiratory rate, operating largely unconsciously.

Somatic

Referring to the body cells that are not involved in reproduction, excluding sperm and egg cells.

Sensory Neurons

Nerve cells that transmit sensory information (sight, sound, touch, taste, and smell) from the body to the central nervous system.

Interneurons

A type of neuron that connects sensory and motor neurons within the central nervous system.