Cells pass through a g2 checkpoint before entering mitosis. ideally, if dna damage is 2 detected, the cells do not enter mitosis until the damage is repaired. why is dna damage repaired before cells enter mitosis? *

a.) so that another round of dna synthesis does not have to take place

b.) so that the chromosomes can align at the metaphase plate during mitosis

c.) so that the cytoplasm can be divided equally between the two daughter cells

d.)so that healthy daughter cells are produced, allowing the organism to continue growing

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.

How are viruses different from eukaryotic cells?

The big bang theory suggest that the universe is about - 300 million years old - 4.6 billion years old - 30 billion years old - 13 billion years old