Which of the following could contribute to changing earth’s climate?
a) driving and using electricity require the burning of fossil fuels and therefore cause an increase in greenhouse gases such as carbon dioxide in the atmosphere.
b) use of paper and wood products involves deforestation. this removes trees that use carbon dioxide in the atmospheric for photosynthesis
c) volcanism adds ash to the atmosphere that blocks out sunlight.
d) a and b only
e) all of the above

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.