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yanalaym [24]
3 years ago
8

What is true of sand dunes?

Biology
2 answers:
Step2247 [10]3 years ago
4 0
They are formed with the flow of air or water.

alexandr1967 [171]3 years ago
4 0

The answer is   D) They are built by the deposition of sand by wind.

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Explain how the ages of the rocks on the ocean floor support the theory of seafloor spreading​
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The Drilling sample of the Seafloor spreading theory helped in determining rock ages on the floor of ocean.

Explanation:

The formation of crusts of ocean by the process of volcanic eruptions in the ridges of the middle ocean is the theory of seafloor spreading proposed by Hammond Hess. The movement of tectonic plates continuously forms sea floors through spreading of seafloor.  The several evidences in support of this theory has been seen, of which some are – molten material eruptions, magnetic stripes in rocks and rock ages.

The drilling evidence is the final one that was proved by taking samples of rock by drilling in ocean and by bringing them with pipes. The observation of these rocks proved that older rocks were collected from farther ridges and youngers are found in the central ridges.  

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Describe the organism that scientists believe was responsible for changing the composition of the early atmosphere. What was it
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DIA [1.3K]

Answer:

The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.

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3 years ago
Small insects such as the water strider can walk on water because their weight is not enough to penetrate the water's surface.
White raven [17]

Answer:

B

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Surface tension allows a water strider to "walk on water"

Water striders are able to walk on top of water due to a combination of several factors. Water striders use the high surface tension of water and long, hydrophobic legs to help them stay above water. ( :

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3 years ago
Most of the energy used by organisms comes from the sun. Which sentence from the article provides the BEST support to the statem
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The correct answer is B it is best support to the statement. Give me Brainiliest

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