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2 years ago

The____era encompasses 90% of earths history.

Biology

2 answers:

Paul [167]2 years ago

7 0

Answer:

The correct answer is: Precambrian.

Explanation:

The Precambrian Era is the very first part of the Earth's history. Its name refers to this era preceding the one that came after it - the Cambrian.

The Precambrian Era began 4.6 billion years ago and ended 541 million years ago, thus encompassing 90% of the planet's history.

Since it happened long ago, there isn't that much evidence of that big period of time. Bacteria fossils that are more than 3 billion years old were found. More complex organisms like algae appeared during Proterozoic eon (the latest part of the Precambrian era).

Basile [38]2 years ago

5 0

The Precambrian Period from 4.6 billion years ago to the beginning of the Cambrian Period

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2 years ago

Hormones or paracrines that inhibit gastric secretion include ________.

enot [183]

Answer:

This question lacks options, options are:

A) histamine

B) gastrin

C) secretin

D) ACh

The correct answer is C.

Hormones or paracrines that inhibit gastric secretion include secretin .

Explanation:

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Answer:

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