¿Cual es la diferencia Entre Las propiedades Físicas y las propiedades Químicas de la materia? x favor ayudenme Es una tarea ​

In which process is oxygen absorbed by an organism asap apex

Witch type of microscope is used to view very small cell components like proteins and dna?

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.