Soil reaction is a. the measure of the acidity or alkalinity of soil b. the highest amount of cations soil can absorb c. determined by the types of minerals in the soil d. the layering of soil into horizons

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

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

Did the vinegar diffuse all the way to the center of any of the cubes? if so, which ones? what does this tell you about surface area-to-volume ratio and the diffusion rate?