Which statement best describes evolution? a. species have changed over time b. traits acquired during a lifetime are passed to offspring c. earths organisms have not changed overtime d. all of earths organisms were formed at the same time

If you add 10ml of hot water to 10ml of cold water and the change in tempature 8°c calculate how much energy is gained by the cold water

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Which is true concerning the products and reactants of photosynthesis and cellular respiration? a. the products of photosynthesis are sugars and the reactants of cellular respiration are starches. b. the products of photosynthesis are reactants in cellular respiration. c. oxygen is needed for photosynthesis and is given off in cellular respiration.