Muscle cells and nerve cells in one species of animal owe their differences in structure to
a) having unique ribosomes
b) using different genetic codes
c) having different chromosomes
d) having different genes expressed

Why did mendel use pea plants in his experiments? a. they have no alleles. b. they are haploid organisms. c. they reproduce quickly. d. they are all male.

Describe the process of nociception using the four phases of

Match each term to its scientific definition. a)natural world b)scientific method c)theory 1) everything that can be observed or explained scientifically 2) a well-supported explanation of all the evidence related to a natural phenomenon 3) the procedure of scientific inquiry used to investigate natural phenomena