A cell measures 84 small eyepiece graticule unit . when a stage micrometer is placed on the stage using the same objective lense it can be seen that 100 eyepiece graticule unit's exactly line with 8 stage micrometer markings. The stage micrometer is markedoff in 0.01mm divisions. Calculate the size of the cell in micrometers

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.

To maintain asepsis when administering an injection, all parts of the syringe can be handled except the:

Which of the following is not associated with invasive species?