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Virty [35]
3 years ago
13

Why are isotopes with short half-lives not useful for dating very old rocks?

Biology
1 answer:
ioda3 years ago
8 0
Answer: Most rocks do not contain organic material-most fossils are not organic anymore. One of the most common isotopes used in radiometric dating is uranium-235 or U-235. ... This makes it useful for dating rocks that are very old. Radioactive isotopes with short half-lives cannot be used for dating old rocks.

not 100% sure :/
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In an animal cell, what is the function of the lysosomes?
Alik [6]
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This could include digesting worn-out organelles so that useful chemicals locked-up in their structures can be re-used by the cell.</span><span><span>Break-down 'digestion' of materials from outside the cell (heterophagy)</span>
i.e. by fusing with vacuoles from outside the cell.
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In general, the functions of lysosomes involve breaking-down i.e. processing to 'make safe' or make use of, or removing from the cell e.g. by exocytosis, useless and potentially harmful materials such as old worn-out parts of the cell or potential threats such bacteria. Lysosomes can therefore be thought of as the rubbish disposal units within cel

8 0
3 years ago
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3 years ago
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Dovator [93]

Answer:

Answer: The correct answer is- Theory.

Hypothesis can be described as an assumption or proposition, which is made on the basis of certain evidences without knowing the real truth about it. It is tested further for investigation about the proposed explanation with the help of repeated experiments (using certain protocols).

When it becomes supported by repeated experimentation, it is converted into theory.

Thus, theory is the right answer.

7 0
3 years ago
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hoa [83]

Answer:

A. esophagus

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C. stomach

D. pancreas

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Explanation:

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miv72 [106K]

Answer:

water drain deep in the soil

Explanation:

when evaporation increase the temperature will also increase as well as the transportation will also increase

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3 years ago
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