2. Atoms combine to form molecules. Which of the following is another example of organization among living things? * A. Tissues combine to form cells.
B. Cells combine to form tissues.
C. Organs combine to form cells.
D. Organs combine to form tissues.

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

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.