John enjoys experimenting with color changing lizards. he places a green lizard on a brown background and a brown lizard on a green background. john knows the green lizard should turn brown and the brown lizard should turn green. neither lizard changes color. what may have caused john's results?

a. other factors may be affecting the color change, like fear or temperature.
b. the lizards had to choose to move to the new background for the effect to take place.
c. more time should be allotted to allow for the color change to take place.
d. the backgrounds may have been the wrong shade of color for these specific lizards.

When a cell is in a solution that has the same concentration of water and solutes as its cytoplasm, the cell is said to be in a(n) solution. a. isotonic b. hypotonic c. hypertonic b. facilitated

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

Idon’t understand this can someone give me the answer? you