Acceleration (change in speed or velocity) is an unbalanced force?

In what for do plants utilize nitrogen? why do they need nitrogen?

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

According to cell theory; which structures carry out the basic function of living things? a. atoms b. organs c. cells b. nuclei