Fossils of Prokaryotes Go Back __________ Billion Years

question 23

Multiple Choice

Fossils of prokaryotes go back __________ billion years.

• A)4.0 to 5.0
• B)3.5 to 4.0
• C)2.5 to 3.0
• D)2.2 to 2.7

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Definitions:

Tend-and-befriend Response

A behavior observed in females as a response to stress, which involves caring for offspring (tending) and seeking social support from others (befriending), believed to be influenced by the hormone oxytocin.

Oxytocin

A hormone and neurotransmitter often associated with social bonding, childbirth, and lactation.

Epinephrine

A hormone and neurotransmitter, also known as adrenaline, involved in regulating heart rate, blood vessel and air passage diameters, and metabolic shifts.

Reaction Formation

A defense mechanism where unacceptable impulses are transformed into their opposite, often in exaggerated form.