Which layer of the atmosphere contains the protective ozone layer?
A. troposphere
B. mesosphere
C. thermosphere
D. stratosphere

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

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

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer