For all cells where protein synthesis occurs, which base pair is found only in mRNA?
A. adenine : thymine
B. uracil : adenine
C. cytosine : uracil
D. cytosine : guanine

Apea plant that is heterozygous for the tall phenotype can produce short offspring when self pollinating. which of the following explains why this occurs? a. segregation of allels b. condominance of traits c. polygenic expression of traits d. independent assortment of alleles

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic

Up until 1938, paleontologists accepted the idea that coelacanths (an ancient fish) went extinct at the time that they last appear in the fossil record, about 80 million years ago. but in 1938, a live coelacanth was discovered off the coast of south africa that was compared to the fossil record and found to be the same species what goal of science does this discovery represent