Deduce Why Viruses Are Excluded from the Ribosomal RNA-Based Tree

question 81

Multiple Choice

Deduce why viruses are excluded from the ribosomal RNA-based tree of life.

• A) Some viruses contain multiple strands of RNA.
• B) Their genetic elements cannot be sequenced.
• C) They can infect other organisms, which complicates the genetic comparisons.
• D) They lack ribosomal RNA (rRNA).

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Definitions:

Amygdala

A region of the brain involved in experiencing emotions, particularly those related to survival, such as fear and the fight-or-flight response.

Leptin

A hormone involved in regulating energy balance by inhibiting hunger, which helps to regulate body weight.

Ghrelin

A hormone produced by the stomach that stimulates appetite.

Intrinsic Motivation

The drive to engage in activities for their inherent satisfaction rather than for some separable consequence.