Select the correct answer from each drop-down menu. A _ Is scientific knowledge established through direct observation and remalns constant. Sclentific knowledge can change
when scientists _

There are main groups in the modern periodic table of elements

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?

What does the xylem do? stores the glucose captures the sunlight absorbs oxygen into the leaf carries water from the roots to the leaves