Jean is doing an experiment to find out whether mold grows faster on certain types of bread. she has eight different types of bread. she places them out on the same counter. every day, jean examines each loaf of bread for signs of mold growth. she then records her observations.

which variable is jean changing in the experiment?
a.
the type of bread
b.
the type of mold
c.
the amount of time each loaf is left out
d.
the amount of light each loaf receives

Apopulation of deer mice was introduced into a desert ecosystem. being dark-colored, the deer mice stood out in the sand and were easy prey for predators. over a few years, the color of the mice changed from dark brown to light brown. what role does natural selection play in this example? a. the change of color camouflaged them, which them hunt better. b. the change of color enabled them to regulate their body temperature. c. the change of color allowed them to hide better from predators. d. the change of color made their bodies tolerant to the harsh desert sand. e. the change of color allowed them to deflect the excessive heat.