Atomic Structure Tutorial Progress: 22/26
Lets see what you've learned! What is true about a PROTON?
charge
mass
location role in the atom
outside nucleus
responsible for
reactivity
0
in nucleus
heavy
+1
virtually zero
-1
holds together the
nucleus
determines the
identity of the atom

Next pretest: evolution select the correct answer in a laboratory population of flies, the female flies are gray and the males are yellowish gray. biologists observed that all the male flies had an equal chance for reproduction, but the male flies with the brightest colors were more likely to successfully reproduce. what phenomenon could explain such a change? a sexual selection b. disruptive selection c. stabilizing selection d. directional selection

During the winter, this species of fox has white fur, but in the summer, it has brown fur. what environmental change may have lead to this fox's fur color? snow cover increase in sun's brightness volcanic eruption global warming

Which of the following is a good strategy when it comes to desserts