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Luden [163]
3 years ago
8

What are the three parts that make up Earth's mantle?

Biology
2 answers:
dexar [7]3 years ago
8 0
The mantle would actually have only 2 major parts- the lithosphere and the asthenosphere.
QveST [7]3 years ago
5 0
Upper mantle, lower mantle. idk the third
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Faciliated diffusion is
BartSMP [9]

Answer:

Facilitated diffusion (also known as facilitated transport or passive-mediated transport) is the process of spontaneous passive transport (as opposed to active transport) of molecules or ions across a biological membrane via specific transmembrane integral proteins.

Explanation:

From Wikipedia

7 0
2 years ago
Where are the protons located?<br> O nucleus<br> O electron cloud
Rzqust [24]

Answer: The nucleus.

Explanation: In an atom, there are two main parts, the nucleus and the electron cloud/electron shells. The protons and neutrons are located in the nucleus, and the electrons are located in the electron shells/cloud/whatever.

3 0
2 years ago
3. All of the organic molecules are based on which element?
Ulleksa [173]

Answer:

<h2><u>Carbon</u><u>.</u><u> </u></h2>

Explanation:

<em>Life is based on carbon; organic chemistry studies compounds in which carbon is a central element. The properties of carbon make it the backbone of the organic molecules which form living matter. Carbon is a such a versatile element because it can form four covalent bonds.</em>

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7 0
2 years ago
Which of the following is a correct difference between active transport and facilitated diffusion?
sweet-ann [11.9K]

Answer:

Active transport requires energy from ATP while facilitated diffusion does not

Explanation:

Active transport and facilitated diffusion with the use of channel and carrier proteins are both ways by which ions, polar and large molecules cross a selectively permeable membrane.

The major difference is that; Active transport transport these particles from a low to high concentration, which is against concentration gradient and hence, energy is required to perform the task

Facilitated diffusion transport from a high to low concentration, which is through a concentration gradient and hence, no energy is required to perform the task.

6 0
3 years ago
Please help . - How do scientist explain the incomplete fossil record? A) The fossil record is limited to fossilized animals and
stich3 [128]

Answer:

Option C.

Scientist explain the incomplete fossil record because not all organisms become fossils. Processes like erosion and mountain building can change rock layers, causing fossils to be spread over multiple layers or destroyed.

Explanation:

  • Fossils are the remains of organisms that are found on the rocks after they die.
  • So, no one can be 100% sure about the complete fossil record because of the continuous process like erosion and other natural calamities.
  • The sediment must cover any organism's remains to start the fossilization process to start. Most of the organisms start decomposing  before this process can be executed.
8 0
3 years ago
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