Infectious diseases are caused by a. viruses c. bacteria b. fungi d. all of the above

i think its d but im not sure

Need with these questions . need the answers in a rush for these questions are the answers i put down are correct or not? ?

Why are human population trends difficult to predict?

Question 1 which of the following allows cells to take in fluids? a. phagocytosis b. pinocytosis c. exocytosis d. receptor-mediated endocytosis question 2 molecules move along their concentration gradient (from areas of high concentration to low concentration) using active transport mechanisms. a. true b. false question 3 which of the following powers active transport (ie. provides the energy for)? a. glucose b. transport proteins c. atp d. phospholipids question 4 what type of lipid is a major component of the plasma membrane? a. cholesterol b. phosopholipids c. proteins d. triglycerides