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nordsb [41]
3 years ago
13

What have scientists determined forms and shapes land masses here on Earth?

Biology
1 answer:
salantis [7]3 years ago
8 0

C

A Land mass is large geographical area that is surrounded by oceans. Therefore this can be synonymous to continents.

Explanation:

The crust is divided into tectonic plates that are dynamic because they move on top of the semi-plastic mantle.  The movement of the tectonic plates is driven by the convection currents of the mantle that drag along the crust above.  The tectonic plates collide at convergent boundaries where tectonic plates are consumed as one is subsided into the mantle. On the other hand, new crust is formed at divergent boundaries where two tectonic plates move away from each other and magma rises from the mantle and cools into new crust.

The convection  currents occurs because the lower mantle is hotter and less dense compared to the cooler denser upper mantle. Therefore the upper mantle always tends to sink as the lower mantle rises. These convection currents are the same as in any other fluids that are disproportionately heated.

Learn More:

brainly.com/question/7667599

#LearnWithBrainly

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Global winds are directly caused by the Earth's rotation and ____
Artemon [7]
<h2>Answer:</h2>

(D)

<h2>Explanation:</h2>

The uneven heating of the Earth’s surface heats up the air which stirs up air currents in the atmosphere Ex. Jet streams, Easterly, Westerly winds.

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3 years ago
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Describe how the output of the Krebs cycle can be modified in additional processes of the carbon cycle.
Murljashka [212]

Answer:

Step 1. A carboxyl group is removed from pyruvate, releasing a molecule of carbon dioxide into the surrounding medium. (Note: carbon dioxide is one carbon attached to two oxygen atoms and is one of the major end products of cellular respiration. ) The result of this step is a two-carbon hydroxyethyl group bound to the enzyme pyruvate dehydrogenase; the lost carbon dioxide is the first of the six carbons from the original glucose molecule to be removed. This step proceeds twice for every molecule of glucose metabolized (remember: there are two pyruvate molecules produced at the end of glycolysis); thus, two of the six carbons will have been removed at the end of both of these steps.

Step 2. The hydroxyethyl group is oxidized to an acetyl group, and the electrons are picked up by NAD+, forming NADH (the reduced form of NAD+). The high- energy electrons from NADH will be used later by the cell to generate ATP for energy.

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4 0
3 years ago
HELP PLEASE What is the correct percentage of time a cell spends in the Interphase and the Mitosis stages?
Paraphin [41]

Answer:

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80% in interphase

to be more exact it spends 78% in interphase and 22% in mitosis :)

3 0
2 years ago
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Where does cellular respiration occur?
Sergio039 [100]
In the mitochondrion
6 0
2 years ago
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stepladder [879]

The ribs articulate with the (a) thoracic vertebrae.

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First seven pairs of ribs are known as 'true ribs'. They articulate with the thoracic vertebrae dorsally and are ventrally attached to the sternum by means of of hyaline cartilage.

The 8th, 9th as well as 10th pairs of ribs do not articulate directly with the sternum but unite with the 7th rib with the support of hyaline cartilage. These are called 'false ribs'.

Remaining two pairs i.e. the 11th and 12th pairs of ribs are not attached ventrally and are thus, termed as 'floating ribs'.

To learn more about thoracic vertebrae here

brainly.com/question/5130476

#SPJ4

4 0
2 years ago
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