A single S. aureus cell gets into a wound on your foot. S. aureus divides by binary fission approximately once every 30 minutes. a. thirty minutes after the initial infection, how many S. aureus cells will be present?

b. in 1 hour, how many S. aureus will be present?

c. in 12 hours, how many S. aureus will be present?

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.

Forensic scientists think they know the identity of a skeleton. what rule should they use to select a relative whose dna could be used to try to confirm the identity?

When can exponential growth happen? a: when there are limited resources b: when carrying capacity is reachedc: when there is no competition d: when the death rate is high