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Crazy boy [7]
2 years ago
15

Approximately 3.85 billion years ago, a group of single-celled microorganisms known as __________ were alive, reproducing, and e

volving.
Biology
1 answer:
seraphim [82]2 years ago
7 0

Microbes.  — cells that have a nucleus, like an amoeba or a paramecium

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Answer:

DNA was discovered in 1869 by Swiss researcher Friedrich Miescher, who was originally trying to study the composition of lymphoid cells (white blood cells). Instead, he isolated a new molecule he called nuclein (DNA with associated proteins) from a cell nucleus.

Explanation:

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Which of the following is not a way in which sponges reproduce?
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The answer is A. By gemmules
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Maribel places her backpack and lunch bag on a lab table where there are lab materials. What is the safest way for Maribel to ar
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Hormones or paracrines that inhibit gastric secretion include ________.
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Answer:

This question lacks options, options are:

A) histamine

B) gastrin

C) secretin

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The correct answer is C.

Hormones or paracrines that inhibit gastric secretion include <u>secretin </u>.

Explanation:

Hormones pass into the blood that waters the digestive system, go to the heart, circulate through the arteries and return to the digestive system, where they stimulate the production of digestive juices. The hormones that control digestion are gastrin, secretin and cholecystokinin. Secretin is stimulated by intestinal acid at the duodenal level. Its effect inhibits gastric acid secretion, prostaglandin secretion and via somatostatin release. It decreases gastric emptying and stimulates bile and pancreatic bicarbonate secretion.

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3 years ago
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2 years ago
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