Which is the best explanation of how catalysts are used in chemical reactions? A. Catalysts are need for every chemical reaction to get started

B. Each catalysts can only be used once we are given the chemical equation

C. Catalysts lower the activation energy for chemical reaction to start

D. Each catalysts see I can find with a few different substrates to get chemical reactions to started faster

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

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. chinchilla x chinchilla 1/2 agouti, 1/2 chinchilla 3/4 agouti, 1/4 chinchilla all chinchilla