What part of a nucleotide accounts for the genetic variation between individuals: Sugar, Phosphate, Deoxyribose, or Nitrogenous Base?

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

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.