Suppose that during a detailed anatomical study of a marine invertebrate, you found a small, previously undescribed structure. how would you test the hypothesis that the structure is a gland that releases one or more hormones?

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

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 of these transport mechanisms moves glucose from the blood into a cell? active transport diffusion facilitated diffusion osmosis