(a) The other function of the kidneys is to regulate the amount of sodium and potassium in the body.
The two bean-shaped organs, are equal to the size of our fist and are located just below the rib cage, one on each size.
The main function of the kidneys is to filter blood by removing extra water from the blood. Apart from this kidneys also regulate the amount of salt and minerals such as - sodium, potassium, calcium, and phosphorus in the blood because without the balance and regulation of the minerals the nerves, cells, and tissues of our body may not work normally. The kidney also produces hormones that help:-
- Control blood pressure
- Make red blood cells
- Keep bones strong and healthy
Read about the function of Kidneys in:
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The chloroplasts help feed the cactus with the energy from the sun and the vacuole helps store the water, food, and waste
Answer:
The answer to your question is sample A and sample C.
Explanation:
Melting point is a physical property of substances, physical properties do not depend on the amount of matter, so it doesn't matter that in one sample we have 5 kg and in the other we have 2 kg.
Besides in samples B and C we have the same amount of matter, they are different substances(copper and iron) so, their melting points are different.
Also, in samples A and D, we have the same amount of matter, but they are different substances so their melting points are different.
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