Answer:
isotonic: two solutions having the same osmotic pressure across a semipermeable membrane
hypertonic: shrink. solution is one in which the concentration of solutes is greater inside the cell than outside of it
hypotonic: swell. solution is one where the concentration of solutes is greater outside the cell than inside it
Explanation:
The two are potassium and rubidium. Why? Na is an alkali metal. As you go down the metals become more reactive.
Calcium has 20 protons. Why? The atomic # is 20 (the one at the top).
It has 20 neutrons. Why? The atomic mass (the number on the bottom) is ~40, ignoring electron mass. 40- 20 protons = 20 neutrons.
It has 20 electrons.
Why? The # of protons and electrons is the same. Ions aren't on the periodic table.
Please mark brainliest if I helped you!
Answer:
hope it helps you
Explanation:
like and mark me brainlist
Answer:
it is every organisms goal to "survive and repopulate" therefore, with natural selection the weaker organisms die because they did not possess the traits necessary to survive, and the strong survive and repopulate
Explanation:
