Nitrogeneous bases
sugar
phosphate group
Observation is the answer
hope this helps
Answer:
A gas-powered lawn mower is a complex machine because for it to function it does more than one motion. For example, it has a wheel and axle system so it can move when powered. And it has a system of simple machines and other parts that are put together to accomplish the task of cutting grass.
Explanation:
Make the worse disease die A: c. maleria
