All living things are made of cells. what might be a major difference between cells that are found in human skin and human nerve cells?

a) human skin cells do not have a nucleus
b) nerve cells do not have a membrane so signals can be sent outside the cell
c) nerve cells are much longer to aid in sending signals to and from the brain
d) skin cells lack cytoplasm since nutrients do not need to pass in intracellular space

Which of these is the most likely consequence of falling petroleum price

According to the cladogram, which organisms have roundworms as a common ancestor?

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.