Which of the following best explains the importance of earth’s crust to living organisms? a. the continental crust allowed the evolution of life on land. b. the crust provides raw materials necessary for life. c. the crust allowed the formation of fossil fuels. d. the rock cycle recycles sedimentary rocks formed from animal shells.

Which scientific design has both practical limitations and limitations due to scale? studying the effect of bleach on the growth of mold spores exposing cultures of duckweed to different intensities of light observing the replication of dna molecules with a hand lens using colored marbles to model a cross between two colors of rabbits

What’s the student’s scientific question

What substance acts to prevent sudden ph changes in bodily fluids?