The control group is the one not given calculators because they are the “as seen in nature” group. The experimental group would be the ones with calculators.
I believe it is A, I’m torn between A and D but I’m not sure.
A current In fluid that results from convection.
hope it helped! :)
When in a certain situation, organisms with traits more suited to survive in that situation often survive more often and are able to reproduce more, which means that their genes eventually dominate the gene pool.
For example: take a light moth population and a dark moth population. They live in a forest with dark trees, so the dark moths blend in more and are harder to find and hunt. As a result, more of them survive than the light moths, so more of them are reproducing and passing their genes along.
Over time, those genes may become the only traits of that variety that the organism can have, so they grow to evolve and adapt to their surroundings.
A larger nucleus is generally less stable than a smaller nucleus because the electric force of repulsion between protons is a long range force, while the attractive strong nuclear force is short-range . Repulsion is therefore large for the large nuclei. To bring about more explanation; if an atom is small then its nucleus is also small, in small nucleus, the distances between nuclear particles are very, very small due to which the nuclear force of attraction is very large as compared to the electrostatic force of repulsion. Since the nuclear force of attraction is much greater than the electrostatic force of repulsion, so a small nucleus is very stable.