<span>The correct answer is that when determining earth's history, scientists use radioactive isotopes to determine the absolute age of fossils and rocks and things like that. They see how things have decayed and changed over time and use these radioactive methods to determine things that happened before time measuring was invented.</span>
While waiting for a signal to contract, a muscle cell membrane maintains a slightly higher positive charge on the outside only because sodium-potassium ATPase pumps are available to generate this difference.
Only because sodium-potassium ATPase pumps are available to provide this difference, a muscle cell membrane maintains a marginally higher positive charge on the outside while waiting for a signal to contract.
To produce an action potential, these sodium pumps can transfer sodium ions across a cell's membrane. The body's muscles can then contract as a result of electrical signals travelling through it.
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Answer:
<h2>URIC ACID </h2>
Uric Acid Uric acid is a compound similar to purines found in nucleic acids. It is water insoluble and tends to form a white paste or powder; it is excreted by birds, insects, and reptiles.
Answer:
meiosis, hope this helped!
Explanation:
