When dna is copied, sometimes a new, incorrect, base pairing appears within the structure of a new dna molecule replacing original base pairs. this mistake is called a base-pair
a. deletion
b. institution
c. substitution

Creation of an unnaturally uniform sample to represent a diverse populationcan be avoided by: a. including only willing b. asking another scientist for .c. choosing only identical participants.d. selecting individuals at random.

What best describes the structure of the declaration of independence?

Nerve cells are specialized to respond to stimulitrue or false?