(Q).
Q: The existence of what tiny, fundamental particles of matter was first proposed in the 1960s? Choices: - atoms - molecules - neutrons - quarks A:
(A).
quarks

(Q).
Q: Polygenic traits are controlled by more than one of these? Choices: - phenotypes - chromosomes - genomes - genes A:
(A).
genes

(Q).
Q: What organ system transports blood through the body and to and from the lungs? Choices: - metabolism - digestive - nervous - circulatory A:
(A).
circulatory