The _______ of a Phylogenetic Tree Represents the Common Ancestor

question 111

Multiple Choice

The _______ of a phylogenetic tree represents the common ancestor, the _______ represent places where lineages diverge, and the _______ axis represents time. Assume that the tree is oriented as described in the textbook.

• A) node; roots; horizontal
• B) root; nodes; vertical
• C) root; branches; horizontal
• D) root; nodes; horizontal
• E) root; branches; vertical

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Definitions:

Phosphate Groups

Functional groups consisting of a phosphorus atom bonded to four oxygen atoms, critical components in the energy transfer within cells and in the structure of nucleic acids.

Ribose Sugar

A five-carbon sugar that is a fundamental component of RNA (ribonucleic acid).

Free Energy

A thermodynamic quantity representing the amount of energy in a system that is available to do work.

Exergonic

A process that releases energy to its surroundings, typically in the form of work or heat.