Before there was any life on earth, which gas was absent from earth’s ancient atmosphere?

Which would be an adaptation in a rainforest, but not in a tundra? a. ability to store water for a long time b. fur that blends in with snow c. strong claws for killing prey d. a beak that can dig into thick trees

Which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above select the best answer from the choices provided a b c d

Gene expression is the activation of a gent that results in a question 1 options: protein dna mitochondria