Katy was tidying up around her apartment when she found bed bugs! She called her friend, Ms. Grant, who told her that she could spray an insecticide or put out sticky traps. Determined to decide which treatment is best, Katy tried both at the same time. She counted the bugs and then sprayed and laid out sticky traps. After one week, she counted the number of bugs she saw. What are the constants of the experiment?

Which of the following statements regarding anfinsen's denaturing experiments with ribonuclease a (rnase a) are valid? exposing the denatured protein to air oxidation and then dialysis to remove urea restored the protein to its original functionality. removing urea by dialysis and then allowing air oxidation of the denatured protein restored the protein to its original functionality. denaturing the protein with both urea and β-mercaptoethanol yielded an inactive protein. anfinsen concluded that protein folding is determined by its primary sequence.

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.

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry