The following atoms are all variations of the element carbon: 12c, 13c, and 14c due to differing numbers of neutrons. what are these variations called?
a. molecules
b. isotopes
c. polymers
d. isomers

2. which is the last step in the scientific method?

Match the following items 1. rr 2. rr 3. identical alleles 4. unlike alleles 5. rr ()homozygous, recessive ()homozygous definition ()heterozygous, dominant cell ()heterozygous definition () homozygous, dominant cell

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area