Rice is a popular carbohydrate food in a. Puerto Rico
b. central Europe
c. northern Europe
d. all of the above

Amines amides and amino acids are categories of

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

Is becoming less expensive to screen blood samples for dna certain diseases have genetic basis what is possible ethical concern about the availability of inexpensive dna testing