Vast quantities of natural gas are located beneath Earth's surface. Natural gas is less costly to extract from the ground than crude oil. Natural gas offers some advantages compared to other energy sources. Despite the large amounts of natural gas, why is it classified as NONRENEWABLE, rather than a RENEWABLE, resource? a
Natural gas is available underground but not in the atmosphere.
b
The formation of natural gas is a process that takes millions of years.
c
Natural gas can be extracted only during certain times of the year.
d
The cost of extracting natural gas from the ground is greater than its value.

Describe how an electric generator works

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?

What are antigens and antibodies? how are they involved in the body’s response to incompatible blood?