Plants are green because they contain the protein chlorophyll. a bucket was left on the lawn for one week. when the bucket was removed, the grass under the bucket had
turned from green to a yellowish white color. this change is due to the interaction between the grass and
decomposer organisms in the soil, an abiotic factor
2
the amount of sunlight, an abiotic factor
increased moisture under the bucket, a biotic factor
the metal composition of the bucket, a biotic factor

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