IO Which is a characteristic of
compounds?
A. Compounds are only pure
substances.
B. Compounds are the smallest
form of a particle.
C. Compounds are made of at
least two types of matter.

the answer is C

Explanation:

compounds are made up of two or more atoms, so they are made up of at least two types of matter

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: