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3 years ago

In the Earth's mantle, heat is transferred in large convection currents. Within these currents,

Biology

2 answers:

Mama L [17]3 years ago

8 0

The answer is D hotter rock rises

Why? Because... While convection is generally discussed as a form of heat flow within liquids and gases, it can occur in solids too. For example, the temperature and pressure conditions in the Earth's mantle allow mantle rock to flow very slowly. Hotter rock gradually rises up and cooler rock gradually sinks down in large convection currents in the mantle.

And because study island....

yarga [219]3 years ago

3 0

Answer:

D. hotter rock rises and cooler rock sinks.

Explanation:

We know that as we move towards Earth's center, the temperature rises. This rise in temperature causes rocks to melt (magma). The high temperature and melting of rocks decrease the density of material which makes it move upward. By moving upward, the molten rock starts turning solid and becomes denser again. Here, it sinks back due to gravity. This upward and downward movement of rocks due to density and temperature makes a convection cell.

PS: The formation of convection cells in Earth's interior is also the reason for plate tectonics.

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cellular respiration
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2 years ago

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Evolution is the process by which populations accumulate inherited changes over time. Which of the following mechanisms drives e

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Out of the choices given, the mechanisms that drives evolution is natural selection. The correct answer is B, natural selection.

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3 years ago

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Here may be more than one pigment in a plant. for example, the yellow green "brassica" morph that you will study this week has a

alukav5142 [94]

Answer: It enables them to cover more of the visible light spectrum and therefore be able to harvest more light energy.

Pigments can be defined as the molecule that absorb specific wavelength of light or they are substances produced by living organisms that obtain color from selective color absorption. Thus, the function of pigment in plant is photosynthesis and they use green pigment chlorophyll with other pigments such as yellow and red pigment which are being used to captures much light energy as possible. However, plant gain from having much more than one pigment because it enables them to cover more of the visible light spectrum and therefore be able to harvest more light energy.

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3 years ago

This area on earth extends from 66.5o degrees North and south of the equator to the poles. It is an area on earth where temperat

Nataliya [291]

Polar ice cap

Explanation:

The polar ice cap is an area on the earth that extends from 66.5° north and south of the equator to the poles.

The polar ice cap is an area of very low temperature and the surface is mostly covered by ice.

The vast polar ice caps the earth's northern and southern limits.
This is the region of the Arctic and Antarctic circle.
This region receives diffused solar radiation from the sun.
This is why they rarely warm up.
The region of the equator has no ice because they receive direct sunlight.
The soil here is frozen.

learn more:

Tundra brainly.com/question/2334099

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3 years ago

CUGGCUAC

Degger [83]

Template DNA 5' GATTCAGAGA 3'

Complemntary strand 3' CTAAGTCTCT 5'

5' GAUUCAGAGA3' mRNA strand

codes of mRNA GAU, UCA, UAG

Explanation:

5' GATTCAGAGA 3' is the example of DNA strand having the sequence.

The DNA strand is leading strand and is in 5' to 3' direction

the complementary DNA strand is formed in 3'to 5' direction as the strand of 5' to 3' acts as a tempelate for complementary strand.

During replication which is semiconservative a new template is formed by adding the nucleotides to the growing strand.

DNA synthesis always takes place in 5' to 3' direction.

5' GATTCAGAGA 3'

3' CTAAGTCTCT 5' Complemntary strand

Transcription is a process in which DNA sequence is transcribed into mRNA which carries codes for amino acids.

The 5' to 3' strand is called sense strand

3' to 5' strand is called antisense strand. mRNA is transcribed from antisense strand and is a copy of sense strand.

so the transcribed DNA strand as mRNA will be shown as:

3' CTAAGTCTCT 5'

5' GAUUCAGAGA3' mRNA strand

GAU codes for = Aspartate

UCA codes for = serine

GAG code for = glutamate (when due to mutation GAA will become GAG)

A will not code as it is not in triplets.

8 0

2 years ago