Your friend says she does not need a flu shot this year because she got one last year. How do you respond? A. You are incorrect because the flu virus grows and develops fast enough that your resistance to previous strains may not protect you against more recent strains.”
B. You are incorrect because the flu virus mutates fast enough that your resistance to previous strains may not protect you against more recent strains.”
C. “You are correct because viruses do not grow and develop, so there is only one strain of the flu virus.”
D. You are correct because viruses do not mutate, so there is only one strain of the flu virus.

Astudent wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. the student measured the growth at the end of the week. all plants received equal amounts of water and sunlight. if you were asked to graph this data, what would you place on the x-axis? a. fertilizer b. water c. plant growth d. week one

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.