Redbeds are hematite layers between layers of rock. They can indicate the presence of which element in the atmosphere?

1 answer:

7 0

Redbeds indicate the presence o iron in the environment. Red beds are red sedimentary rocks and the color is due to the presence of the ferric oxides. Ferric oxides occur as a coating on the sedimentary grains. In between the shale and cherts, iron-rich sediments can be found.

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Which event may lead to speciation? Question 3 options: A. a population is divided by the formation of a river valley. two popul

lora16 [44]

A new island is formed from a volcanic eruption is an event that lead to speciation.

<h3>What is speciation?</h3>

Speciation is the evolutionary process in which in populations of organisms come to being or evolve to become distinct species. The biologist Orator F. Cook made some Discovery and term it speciation in 1906when he performed experiment on cladogenesis, the splitting of lineages, as opposed to anagenesis, phyletic evolution within lineages.

Therefore, A new island is formed from a volcanic eruption is an event that lead to speciation.

Learn more about speciation from the link below.

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High biodiversity means that a region supports a wide variety of species, while low biodiversity implies that an area supports only a few.

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Which structure secretes digestive enzymes that break down carbohydrates, fats, and proteins? A. Pancreas B. Large intestine C.

Ivahew [28]

<span>Which structure secretes digestive enzymes that break down carbohydrates, fats, and proteins? A. Pancreas

Most of the enzyme in the intestinal system is made by pancreas. Pancreas will also secrete insulin to make cell utilize glucose. The Large intestine is absorbing water. Salivary glands mostly digest carbohydrate.</span>

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Which foods would have the following nutrient test results? (results shown below)

aniked [119]

Answer:

The correct answer is - option c.

Explanation:

Benedict test is used to test the presence of reducing sugar in a sample. If the benedict solution turns in red or orange color it means there is a presence of glucose as it is a reducing sugar. So, this test result shows that there no reducing sugar in the sample as it is blue.

Lugol test is the test to see if the sample has starch in it or no by turning in to blue color, in this result, it is orange in color which suggests that there is no starch available.

A Biuret solution is used to test for the availability of protein in a particular sample, purple or pink color is the representation of the presence of protein. There is no protein as per result

Sudan red test is used to test the presence of TGA, lipids, or lipoproteins in a sample by reacting with it and turn in to red color. The absence of the lipids shows no change as it is shown in this test.

Thus, the correct answer among these options is - option C.

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