What nervous system components would you expect to find in a cephalized invertebrate such as a beetle?
a) a nerve net a brain.
b) spinal cord.
c) sensory ganglia nerve cords.
d) transverse nerves a brain.
e) ventral nerve cords.
f) segmental ganglia.

Did you know that a single bee would have to go to over 2 million flowers to make a single pound of honey?

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?

Aristotle classified animals according to their a. habitat and mating behavior c. mating behavior and relatedness b. habitat and physical differences d. physical differences and mating behavior