What component of blood fight disease?

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.

The negative impacts of nonnative species generally outweigh the positive impacts

How energy flows through each level in this energy pyramid. is all the matter and energy from one level transferred to the next level?