Read this excerpt from "dna testing." dna samples from insects preserved in amber can date back to before the time of the dinosaurs, which died out 65 million years ago. george poinar of oregon state university, for example, has even extracted muscle tissue from a 125-million-year-old lebanese weevil. this is, says poinar, "the best preserved protein on the face of the earth." so far, dna has been successfully extracted from about a half dozen ancient samples in amber. select the most accurate summary of kaku's argument.

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."