What are the functions of a catalyst in a reaction? select all that apply A)sped up the reaction.
B:Increase the activation energy needed
C: lower the activation energy needed
D:maintain the reaction
E: slow down the reaction

The energy of blowing wind can be harnessed to create electricity. why is wind considered a renewable energy source? a) wind does not cause destruction of the environment. b) wind turns the blades of a windmill that creates electricity. c) wind provides only a very small amount of electricity to the united states. d) wind comes from atmospheric conditions that are available indefinitely.

Which of the following is one of the four conditions necessary for natural selection to occur in a population? fewer organisms are born than the habitat can support mutation does not occur organisms have identical characteristics variation is inherited

Select the correct answer from each drop-down menu proteins are