A scientist grew Bacteria in a system that allowed for the addition of fresh nutrients and the removal of waste products. Bacteriophage (virus) were added
at the time shown and the following population changes were observed. a)
Describe and explain two changes observed in the number of bacteria after the
virus is added. b) Describe how the genome of a retrovirus like HIV (Human
Immunodeficiency Virus) becomes incorporated into the genome of the host cell

There are specialized producers that live in warm water vents deep in the ocean. these producers do not per-form from photosynthesis, but instead perform a similar process with iron and other chemicals. why do you think these producers use this process instead of photosynthesis?

A(n) is a molecule influences the way that a molecule reacts.

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