What Trait Do All Cells on Earth NOT Have in Common

question 55

Multiple Choice

What trait do all cells on Earth NOT have in common?

• A) double-stranded DNA
• B) cell wall of varying composition
• C) universal gene code, common ancestral rRNAs, and elongation factors
• D) common ancestral functional domains in proteins
• E) cytoplasm, an aqueous compartment enclosed by a membrane

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Definitions:

Reticular Activating System

A network of neurons located in the brainstem that plays a key role in regulating wakefulness and sleep-wake transitions.

Peripheral Nervous System

The peripheral nervous system is the part of the nervous system that consists of the nerves and ganglia outside of the brain and spinal cord, connecting the central nervous system to limbs and organs.

Spinal Cord

A long, thin, tubular structure made up of nervous tissue, which extends from the brainstem down the back and transmits neural signals between the brain and the rest of the body.

Cross-Sectional View

Provides a view of an object as if it were sliced perpendicularly to show its internal structure.