You conduct the following serial dilution: Step 1: You’ve diluted 100 ul of a bacterial stock with 800 ul distilled water, but the sample still needs further dilution

Step 2: You then take 100 ul of the dilution from step 1 and dilute it further with 400 ul of distilled water.

A.) What is the dilution factor after Step 1? (2 points)

B.) What is the final/total dilution factor at the end of Step 2 from the starting stock? (2 points)

Construct an explanation about the function of mitosis for multicellular organisms

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.

Imagine that certain laws of physics could be ignored and you were able to travel vast distances in moments. now imagine that you traveled to an earth-like planet located light-years away that is known to support life. think about what you’ve learned in this unit and make an argument for what you think would be the dominant type of life form on this planet. consider whether a notochord is required for an organism to manipulate its environment and become a dominant creature.