You have a 10x enzyme buffer that you are to use in a particular reaction. The total volume of the reaction is 30μl. How much of the 10x buffer should youadd so that the final concentration of buffer in the reaction is 1x?I ordered 50 mM (millimolar) primer in 100 uL. I want to make a 50 uM (micromolar) stock solution. What volume do I add to the tube to dilute the primers to make the 50uM (micromolar) stock?

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.

The picture shows a location in india that is very dry and arid. notice the tall mountains in the background; you can find high amounts of vegetation on the other side of the mountains. which statement is most likely true for this area?

Which of the following is caused by reproductive isolation within a species? a. a decrease in gene flow b. an increase in genetic flow c. a decrease in genetic drift d. an increase in gene flow