The First Known Multicellular Organisms Evolved Approximately How Many Years

question 27

Multiple Choice

The first known multicellular organisms evolved approximately how many years ago?

• A)3.5 BYA
• B)2.1 BYA
• C)1.4 BYA
• D)100 MYA

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Definitions:

Thick Layer of Mucus

describes a dense secretion produced by mucous membranes, serving to protect and lubricate surfaces.

Pressure Gradient

A pressure gradient is the difference in pressure across a physical space, which drives the flow of fluids from regions of higher to lower pressure.

Volume Gradient

The difference in concentration of a substance across a space or a membrane, often driving diffusion or movement of substances.

Temperature Gradient

The rate of temperature change in space, reflecting differences in temperature over a specified distance.