In Which Specific Era of the Phanerozoic Eon, Did Shelly

question 71

Short Answer

In which specific Era of the Phanerozoic Eon, did shelly organisms first appear in the fossil record?   _________________________

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Definitions:

Estrogens

A group of steroid hormones important for the development and maintenance of female characteristics and reproductive functions.

Nonmatching-to-sample Task

A cognitive task in which the participant must select the option that does not match a given sample, testing memory and discrimination abilities.

Displacement Task

A cognitive experiment that assesses the ability to remember the location of an object after it has been moved out of direct sight.

Socioeconomic Status

A combined measure of an individual's or family's economic and social position relative to others, based on income, education, and occupation.