Which One of the Following Statements Is TRUE

question 21

Multiple Choice

Which one of the following statements is TRUE?

• A)Natural selection works on variation already present in a population.
• B)Natural selection works on nonheritable traits.
• C)Individuals evolve through natural selection.
• D)Individual organisms evolve structures that they need.

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Definitions:

Bronchioles

Small airways in the lungs that stem from the bronchi, leading to alveolar ducts and eventually to alveoli, where gas exchange occurs.

Urinary Bladder

A muscular sac in the pelvis, just above and behind the pubic bone, that stores urine before it is excreted from the body.

Preganglionic Neuron

A preganglionic neuron is a nerve cell that projects from the central nervous system to a ganglion, part of the autonomic nervous system, where it synapses with postganglionic neurons.

Somatic Motor System

The part of the central and peripheral nervous system involved in the voluntary control of body movements via skeletal muscles.