When loading samples into an agarose gel
a. add 6x dye to ALL samples and pipet the SAME total volume for each well.
b. use the SAME micropipetter tip for ALL samples.
c. add control DNA to ALL your samples.
d. load ALL samples BEFORE electrophoresis buffer is added fully over the gel in the electrophoresis rig.
e. always go to the second stop of the micropipette to fully dispense ALL of the sample into its well.

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms