Which structures are parts of the central nervous system? Check all that apply The brain
The heart
The spinal cord
The sensory neurons
The bones
The muscles

Leila has dimples because she received a gene copy from her father that coded for dimples. this means that dimples are an example of a trait that is

The response is the basis for vaccination. primary secondary tertiary none of the above

Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?