Which of the following activities contributes most to climate change? a. swimming b. walking to school c. driving or riding in a car d. riding a bike

If scientists are wrong about earth's age based on radioactive material and the decay rates are really much faster, how would nuclear power plants be affected?

Dna replication or repair occurs in a cell in all of thw following situations except when

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b. diffusion c. endocytosis d. exocytosisc. endocytosis