Productivity can best be described as:

When does dna replication(make a copy of itself)?

Pentane with molecular formula c5h12, exists in three isomeric forms. one shows linear carbon chains, another has one -ch3 groups present on the third carbon atom, and the third has two -ch3 groups present on the second carbon atom. what types of isomers are these? a. geometric isomers b. structural isomers c. halotropic isomers

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.