In the late 80's and early 90's twelve children were diagnosed with leukemia. The map shows the effect of the pollution on childhood leukemia rates in the area. The orange area shows the likelihood of cancer in children being 2.6 times more then the yellow area. The
red area shows the likelihood of cancer in children being 3.4 times more then the yellow area. What can you infer caused the children
closet to the landfill to become ill?
es )
A)
The landfill area was where decomposition of organisms (like plants and
animals) took place.
B)
The landfill area was sprayed with pesticides to keep the flies away.
C)
Huge amounts of waste were illegally dumped.
D)
Large amounts of plastic waste were burned.

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?

In the practice of science, this type of reasoning is used to develop explanations.

You are working in the lab and are working with the same element but with varying isotopes of the element. you are working with c-11, c-13, c-14, and c-15. what is the average atomic mass of this element? (use periodic table) a- 12 b-15 c-14 d-13