Question: Q: What does temperature measure? Choices: - lowest kinetic energy of molecules - average potential energy of molecules - highest potential energy of molecules - average kinetic energy of molecules A:
Answer: average kinetic energy of molecules

Question: Q: Which factor often changes a protein from an inactive form to an active form? Choices: - oxygen groups addition - lipid groups addition - nitrogen groups addition - phosphate groups addition A:
Answer: phosphate groups addition

Question: Q: Each pollen grain has two coverings: the exine (thicker, outer layer) and the what? Choices: - tube nucleus - pollen tube - cytoplasm - intine A:
Answer:
intine