Which statement best describes why water is an effective solvent? Choose 1
Choose 1

(Choice A)
A
Water is an ionic compound that attracts other like molecules.

(Choice B)
B
Water’s relatively small size allows it to fit between individual atoms, driving them apart.

(Choice C)
C
Water’s hydrophobic nature separates polar and non-polar substances.

(Choice D)
D
Water’s polarity allows it to dissolve ionic and polar compounds.

Which of the following statements is correct in hour our immune system responds to a potential pathogen? a. the adapted immune system will call on the innate immune system to destroy the pathogen. b. b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c. the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. d. the t-cells in the adapted immune systems are the first to recognize the pathogen vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a. antigen, antibody b. antibody, antigen c. antibody, antibiotic d. antibiotic, antibody