Answer:
An egg placed in salt water will float!
Explanation:
In normal tap water, an egg will sink because it's density is greater than the density of water. But, when salt is added to the water, it's density becomes greater than the egg's density. The term used to describe this is "buoyancy."
The correct answer is "intake and excretion are equal." Normally, there should be equilibrium between the intake of sodium and the excreted sodium. There are regulatory mechanisms in the body that regulate the excretion of sodium in order to match it with the intake. This is to prevent hyponatremia and hypernatremia.
Answer:
I would go with B:
The body must maintain homeostasis so that the internal environment stays the same if the outside
Answer:
C. Atomic Number
Explanation:
Atomic number, also known as proton number, never changes. Therefore it allows us to identify each atom.
