What observation did darwin make that suggested there had been geological changes in earth's history?
a. giant tortoises
b. fossils of giant sloths
c. fossil shells on top of mountains
d. an absence of rabbits in south america

Which of the following are false concerning microbes? a. microbes generate oxygen through photosynthesis.b. the primary role of microbes on the planet involves causing disease in animals and humans.c. microbes produce vitamins in the intestines.d. microbes play a role in breaking down waste and decomposing dead organisms.

All organisms contribute some water to the water cycle by conducting

Which is the correct formula for photosynthesis