Fossils Have Been Discovered for About How Many Species

question 18

Multiple Choice

Fossils have been discovered for about how many species?  

• A) 10,000
• B) 50,000
• C) 100,000
• D) 150,000
• E) 250,000

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Definitions:

Cortex

The outer layer of the cerebrum of the mammalian brain, involved in higher brain functions such as thought and action.

Thalamus

A brain structure that processes and relays sensory information to the appropriate areas of the brain.

Neurons

Specialized cells that convey nerve signals, serving as the fundamental components of the nervous system.

Nerves

Bundles of axons coated in myelin that travel together through the body.