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sergey [27]
3 years ago
10

How long after the formation of Earth did the first life appear?

Biology
1 answer:
djyliett [7]3 years ago
6 0

Answer:

4.54 billon years

Explanation:

the earliest time that life forms first appeared on Earth is at least 3.77 billion years ago possibly as early as 4.28 billion years

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A chemical substance that organisms require to live is what
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Answer:

Nutrients.

Explanation:

Nutrients are the chemical substances required by any organism to meet the basic requirements of life. The nutrient can be either organic or inorganic, but both are important for the organism.

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Distinguish between the terms evaporate and precipitate
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Answer:

When solid water is exposed to enough heat, it will melt and return to a liquid. As that liquid water is further heated, it evaporates and becomes a gas—water vapor. ... When it is cool enough, the water vapor condenses and returns to liquid water. These water droplets eventually gather to form clouds and precipitation

Explanation:

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Insulin-dependent diabetics depend upon ____________ microorganisms to produce the human protein that they rely upon to uptake g
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The answer to this is D.
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The role of antibodies in the human body is to
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b

Explanation:

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A cell membrane that transports glucose, ions, or other charged or polar molecules is likely to have a higher percentage and gre
erica [24]

Answer: True

Explanation:

<u>A cell membrane consists of a lipid bilayer made of polar phosphate head and a nonpolar lipid tail.</u> It is semipermeable and regulates the transport of materials through it. For this,<u> it is selectively permeable</u> and since it is made of lipids, hydrophobic and small polar molecules can diffuse easily through it by simple diffusion and down their concentration gradient. However, polar molecules, large molecules (such as glucose) and ions are not able to pass through it because they are repelled.

To accomplish the transport of these molecules that can not diffuse, proteins embebbed in the membrane function as carriers that enable the transport of polar molecules, large molecules and ions by passive (through facilitated diffusion, down its concentration gradient) or active transport (movement against its concentration gradient).

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