Which are common issues for someone who has sickle cell anemia? SELECT 2 OPTIONS.
A)reduced oxygen levels
B)blurred vision
C) heart disease
D)blocked blood vessels
E)cancer

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?

Use the distance formula to determine weather each pair of segments have the same length

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?