Enzymes are able to speed up chemical reactions because they- a) increase the temp inside the cell
b) reduce the friction between the reactants
c) make the raw materials more chemically reactive
d) lower the activation energyof the reaction

You have a solution that contains phospholipid vesicles in a test tube. these vesicles have phospholipid bilayers, but do not contain any membrane transporters. you add a number of different molecules to the solution, and wait a period of time for them to equilibrate. if you could measure the concentration of each molecule, for which of the following would you expect to measure equal concentrations inside and outside of the vesicles? assume for this question that the overall osmolarity inside and outside the vesicles is the same (that is, there is no appreciable diffusion of water across the membrane). (select two answers) an amino acid with a hydrophobic side-chain a small non-polar molecule a negatively charged ion a small polar molecule a small lipid hormone

Wich organism obtains its energy from dead or decaying matter

Warmer ocean surface water would most likely be found near