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zmey [24]
3 years ago
11

Which of the following energy sources is formed from ancient marine deposits? (AKS 1a / DOK 1) A. coal B. oil C. uranium D. peat

Biology
1 answer:
Debora [2.8K]3 years ago
3 0

Answer: b.

Explanation:

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Mutations are important for evolution because they
Vikki [24]
Mutation causes change in an organisms DNA, resulting in a change in all aspects of the organisms life. It affects how the organism looks, and how it behaves. If there was no mutation, an organism could not change, therefore there wouldn't be evolution at all.
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3 years ago
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The proportions of the bases are consistent within a species; however they do vary between species. Using the base-pair rules, c
Snezhnost [94]

Answer:

The correct answer would be:

                  A         G          C         T

Human:   31          19          19       31

Cow:         28         22      22         28

Salmon:     29       21       21         29

Wheat        27      23        23        27

Yeast         31         19       19         31

Explanation:

According to the rule of Chargaff which states or explains the amount of the A, T, G, and C bases in the DNA molecule. It says that the DNA of any organism should have a pyrimidine and purine ratio of 1:1. This means the amount of A would be equal to T and the amount G should be equal to the amount of C.

It also says that the amount of a and G would be equal to the amount of C and T. So on the base of this we can find the missing value in the table:

                    A         G          C         T

Human:   31          19          19       31   (A= T and G=C)

Cow:         28         22      22         28  (A= T and G=C)

Salmon:     29       21       21         29   (A= T and G=C)

Wheat        27      23        23        27 (100 - A+T = G+C)

Yeast         31         19       19         31 (A= T and G=C)

5 0
2 years ago
What types of organisms typically make the bass middle and top of the food chain
Aleksandr-060686 [28]

Answer:

In the food chain, producer makes the base, primary and secondary consumers are present in the middle and tertiary consumers is present on the top.

Explanation:

Producers are the organisms which makes their own food such as plants. They are placed at the base due to high population. Primary and secondary consumers are placed in the middle due to less population than producer and tertiary consumers are placed on the top due to very low population.

8 0
3 years ago
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After researching the rock they found, Mary and Jim believe it contains large pieces of the mineral limonite. They observed that
WINSTONCH [101]

The hypothesis can be defined as an educated guess, which is made by the scientists doing a scientific research.

In this case, the scientist want to test the presence of the limonite in the yellow rocks, So, proposed hypothesis should include the color of rock they want to observe and the posssible outcome, which need to be tested.

So, a proposed hypothesis can be:

<h3>The rocks, which have yellow color are made up of mineral limonite. </h3>
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Why is it sometimes difficult to distinguish petals and sepals?
Troyanec [42]

Answer:because of the color and shape

Explanation:

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