Which of the following statements about human impact on trees is true? a. human activity always has a negative impact on trees. b. all human uses of trees require destruction of the trees. c. human activity has had both a positive and negative impact on trees. d. cutting down trees is the only activity that has a negative impact on trees.

Differentiation of cells changes the nucleic information. true false

Which of the following is the most likely outcome of global warming

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