The Evolution of Complex Multicellularity in Eukaryotes

question 2

Multiple Choice

The evolution of complex multicellularity in eukaryotes

• A) occurred only once, in the common ancestor of all eukaryotes.
• B) occurred only once, in the common ancestor of all multicellular eukaryotes.
• C) occurred only once, in the animal lineage.
• D) is not documented by the fossil record.
• E) occurred independently in several different eukaryotic lineages.

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Definitions:

A/C System

Air Conditioning System, a system for controlling the humidity, ventilation, and temperature in a vehicle or building.

Boil Point

The temperature at which a liquid turns to vapor.

Pressure Relief Valve

A pressure-limiting device that trips at a predetermined pressure to define circuit pressure or act as a safety device. A safety pop-off valve is one type of pressure relief valve.

High-Pressure Cut-Off Switch

A safety feature in systems that automatically stops the system when the pressure exceeds a predefined limit to prevent damage.