Convection in the upper mantleMagma injection at the spreading boundaries

Gravity pulling the plates downward at subduction zones

These are three theorized causes of?

Answers

Answer 1

Answer: movement of the tectonic plates.

Answer 2

Answer:

I just took this test. it is : movement of the tectonic plates.

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Which enzymes are secreted only by the pancreas?nucleases
amylase and proteases
lipases
amylase, proteases, lipases, nucleases

Answers

Nucleases are the enzymes that are unique to the pancreas. These are enzymes which break down nucleic acids DNA and RNA into nucleotides. When these nucleotides reach the ileum, they are further degraded or digested into sugars, bases and phosphates. These nucleases are known as DNAase and RNAase

Other pancreatic enzymes such as amylase and protease are also produced by other digestive organs such as the salivary glands and the small intestine respectively. However no other digestive organ has been known to produce nucleases apart from the pancreas.

Nucleases are of two main types, namely exonucleases which cut off the end of a nucleotide and endonucleases which will cut out certain nucleotide sequences right in the middle of a nucleic acid.

The enzymes that are secreted only by the pancreas are amylase, proteases, lipases, and nucleases. Therefore, option (4) is correct.

Digestive organs include the pancreas. It secretes digestive enzymes into the small intestine to facilitate food digestion. Amylase breaks starches into sugar molecules. Trypsin and chymotrypsin break proteins into amino acids. Fatty acids and glycerol from lipases aid fat breakdown and absorption.

Finally, nucleases break down DNA and RNA into nucleotides. The pancreas exclusively produces and secretes these enzymes to aid small intestine digestion and absorption. Therefore, option (4) amylase, proteases, lipases, and nucleases is correct.

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What is the ultimate source of heat in the process of global warming

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The sun. Greenhouse gases absorb heat better. So the more of these gases, the hotter it gets. However, the earth itself is naturally heating, but it goes too fast for live to adjust to the temperatures.

What is the pH range of highly acidic substances?

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pH stands forthe power of hydrogen. pH that ranges form 1-6.9 are acid substances. At pH 1 -2.9, the substance is highly acidic. At pH 3 - 4, the substance is mildly acidic.At pH 4.1 – 6.9, the substance is weakly acidic. At pH 7, it is neutral. At pH7.1-14, it is basic. At pH 7.1 - 10.9, the substance is weakly basic. At pH 11- 13, the substance is mildly basic. At pH 13.1 – 14, the substance is highlybasic.

The pH is acids are 1-7, while 7 is neutral.

The highly acidic substances are ranging between 1 and 3, while 1 is the MOST acidic.

How is a raft different from a typical ecosystem when considering carrying capacity?

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Answer:

In the simplest method of integrated aquaculture, rafts of alternating seaweed ropes and mussel ropes are suspended vertically from a ...

At present, cosmologists expect the universe to _____.

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The answer is to continue expanding.

Cosmology is study of the origin and evolution of the universe. Currently, cosmologists expect the universe to continue expanding indefinitely and probably heating up. The expansion is speeding up. Also, it is expected that entropy will increase leaving no free energy in the Universe.

Answer: