Which two statements describe a mixture? A. it includes atoms of different elements
B. it can result from chemical bonding
C. its parts can be separated using physical means
D. it is a pure substance

Which of the following is the main purpose of a human community?

Robert wants to know which fertilizer will work the best for his grass. what can he do to explore this inquiry?

Which of the following statements is true? a. there are more chromosomes in an organism than there are genes. b. there are more genes in an organism that there are chemical bases. c. dna is made of sugar, phosphate, and carbon. d. genes are found in specific locations on a chromosome.