Refer to the Figure

question 234

Multiple Choice

Refer to the figure. Genome size varies widely among different multicellular organisms.What is the greatest contributing cause of this variation?

• A) The number of protein-coding genes
• B) The amount of noncoding DNA
• C) The number of duplicated genes
• D) The size of the organism
• E) The amount of positive selection for change in protein-coding genes

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Definitions:

Risky Behavior

Actions that expose individuals to danger or harm, often with a disregard for the negative consequences.

Gray Matter

The darker tissue of the brain and spinal cord, consisting mainly of nerve cell bodies and branching dendrites.

Frontal Lobes

Regions of the brain located at the front of each cerebral hemisphere, responsible for decision making, problem solving, control of purposeful behaviors, consciousness, and emotions.

Myelination

The process of forming a myelin sheath around the nerves, improving the speed and efficiency of electrical impulses.