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There Have Been About __________ Mass Extinction Events in Earth's

question 55

Multiple Choice

There have been about __________ mass extinction events in Earth's history.


Definitions:

Neurotransmitters

Neurotransmitters are chemical messengers that transmit signals across a chemical synapse, from one nerve cell to another, influencing a wide range of bodily functions and behaviors.

Rh Incompatibility

A condition in which antibodies produced by the mother are transmitted to the child, possibly causing brain damage or death.

Androgens

Male sex hormones.

Prenatal Development

The developmental journey from fertilization to delivery inside the uterus.

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