Which is a property of every mixture?
a. one substance dissolves in another substance.
b. the molecules of one substance break down in the other.
c. different samples of a single mixture have different characteristics.
d. one substance can be separated from another through physical means.

Which of these statements is true about autotrophs, but not heterotrophs? a. they use sugar and oxygen to make carbon dioxide and water.b. they use chlorophyll and oxygen to make carbon dioxide and water.c. they use sunlight, water, and carbon dioxide to make sugars.d. they use sunlight, water, and oxygen to make chlorophyll.