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zalisa [80]
3 years ago
6

What is the main idea behind the model of a molecular clock?

Biology
1 answer:
denpristay [2]3 years ago
6 0
D I just took the test
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Which of the following traits is not considered an adaptation for early plant terristeral life
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What source of evidence did charles darwin use to support his ideas of evolution?
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The evidences that Charles Darwin used to support his theory are:
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analogy and homology.

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Sandstorms frequently happen in Mediterranean and tropical climates.
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Under anaerobic conditions, how do cells regenerate atp?
slamgirl [31]

Option B: Under anaerobic conditions, cells generate ATP through anaerobic glycolysis and creatine phosphate.

Our body produces ATP through oxidative phosphorylation. ATP is used in various functions and gets hydrolyzed into ADP and inorganic phosphate. But during intense exercises like sprinting, our body becomes unable to produce sufficient ATP through oxidative phosphorylation.

In this condition, creatine phosphate is used to regenerate ATP molecules for a short time. Creatine phosphate, when short of oxygen, transfers high-energy phosphate to ADP. ADP then gets transformed into ATP and produces creatine out of the reaction.

Another mechanism to produce ATP when short of oxygen is through anaerobic glycolysis. In this method, glucose is converted to lactate. This is a faster mechanism that produces 2 molecules of ATP per glucose molecule. The energy produced through oxidative phosphorylation is 100 times slower than anaerobic glycolysis.

To know more about ATP production, refer to the following link:

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7 0
2 years ago
Ions are
luda_lava [24]

Answer:

Ions are atoms with a positive or negative charge.

Explanation:

Ions are atoms or molecules that, when subjected to the phenomenon of ionization, gain or lose electrons, ceasing to be neutral and acquiring an electric charge.

The charge that atoms or molecules possess can be positive —if it has lost electrons— or negative when it acquires electrons. The negatively charged particle is called anion, and when it is positively charged cation.

The other options are not correct because of:

  • <em>There are usually as many or more neutrons than protons. </em>
  • <em>Uncharged atoms are neutral. </em>
  • <em>The number of protons or neutrons does not affect the electric charge of the atom.</em>
  • <em>Atoms that joined in fixed proportions can form molecules.</em>

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3 years ago
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