Genetic diseases are called and are not contagious. a person who has a gene for the disease but does not have symptoms of the disease is called a .

Which statement about dna replication is true? a. eukaryotes only have one circular chromosome that unwinds at multiple locations. b. eukaryotes can only replicate one segment of a chromosome at a time. c. prokaryotes can only replicate their single circular chromosome in the nucleus. d. prokaryotes only have one origin of replication to initiate replication.

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

2points what do bacteria have in common with the cells of other living organisms?