You have a hypothesis that of people ages 4 to 35, teenagers will like a new drink called sugarhi better than any other age group. you want to survey 40 people for their opinions about the drink, but you are unsure how many people to survey from each age group. which of the answer choices below represents the most fair way to collect the data?

a. 10,15,5,10

b. 5,30,2,3

c. 10,5,15,10

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 you are introducing the lac operan and the trp operon to students who have never learned about it before. complete the table to compare the similarities and differences between the two operons

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water