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Vladimir [108]
3 years ago
12

The Phanerozoic Eon began approximately 545 million years ago when hard-shelled animals called...

Social Studies
1 answer:
nika2105 [10]3 years ago
7 0

Answer:

Trilobites

Explanation:

The Phanerozoic Eon is characterized by the presence of organisms that possessed hard shells as an adaptation to the environmental conditions. Among these organisms, the most common hard-shelled animals were the trilobites.

Trilobites were present during most of the Paleozoic Era, which belongs to the Phanerozoic Eon. These animals were marine organisms with remarkable and unique phenotypes.

The body of a trilobite was composed of three segments: the cephalon, the thorax, and the pygidium (tail). In addition, they possessed an exoskeleton composed of chitin, which was the reason behind their hard shells. They shed their exoskeletons to be able to grow.

Trilobites are currently extinct.

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Explanation:

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Explanation:

As a conception of philosophical knowledge, the Rationalism began to take shape during the Renaissance, but its early origins can go back to Greek philosophy, with Platonic idealist theses and the conception of the principle of causality. For the rationalists, all the ideas we have originate from pure rationality, which also imposes an innate conception, that is, that the ideas have innate origins in the human being, being born with us in our intellect and being used and discovered by the people who they make better use of reason.

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