Which of the following are possible results of exposure to radiation or toxic chemicals? i. dna mutations occur in body cells and cancer develops. ii. dna mutations occur in body cells and are passed on to offspring. iii. the exposed organism becomes sterile. iv. dna mutations occur in gametes and birth defects result.

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.

Beth’s hygrometer is reading a temperature of 30 c and a relative humidity of 65%. the humidity in the air is?

How does human environment effect the biosphere