Nebula
an explosion of a star
supernova
the dense remains of a
star
neutron star
a large mass of gas and
dust

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

Tides that occur during the new and full moons

The word belongs in a different group than all of the other words in the list.