Order the statements below to describe the population before and after the environmental change.
earlier
A sandstorm covers most of the population's
environment with brown sand.
After many generations, most of the mice in the
population have brown fur.
After many generations, most of the mice in the
population have black fur.
Mice with brown fur are more likely to survive and
reproduce than mice with black fur.
Mice with brown fur are less likely to survive and
reproduce than mice with black fur.
The population of mice is in an environment with many
black rocks.
later

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.