Why spiral heterocycles yield one carbonyl product during ring opening

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

Express the following number in scientific notation. 0.026890 =

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?