Which description about prokaryotic versus eukaryotic DNA replication is not correct?
In prokaryotes, the DNA replication is unidirectional; in eukaryotes, the replication is bidirectional.
In prokaryotes, there is only one origin of replication; in eukaryotes, there are many.
In prokaryotes, there is only a single replication bubble; in eukaryotes, there are many.
In both prokaryotes and eukaryotes, the new and old DNA strands are assembled in antiparallel manner.
In both prokaryotes and eukaryotes, the DNA undergoes negative supercoiling during replication.

Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.

Which best describes this behavior? it is beneficial only to the males that do not fertilize eggs. it is beneficial only to the female workers that are not fertilized. it is beneficial to each one of the individual colony members. it is beneficial to the whole species, but not to all of the individual members.

Where is having brightly colored feathers that attract mates most clearly an adaptation for a bird? a. a forest with dense vegetation b. a sandy beach beside an ocean c. a snowy tundra with little vegetation d. a swamp with many hawks that eat birds