Biology, 29.08.2019 17:30, mawawakaiii
Researchers conducted an experiment to identify the effects of three different hand sanitizers on the growth of bacteria. the
researchers grew one type of bacteria in twenty-four identical covered petri dishes. then, they opened eighteen petri dishes
and applied the three hand sanitizers to six petri dishes each. they left the remaining six petri dishes closed as a control
group. when the researchers measured the growth of bacteria two days later, the six dishes that had no hand sanitizer
showed the least amount of bacterial growth. the researchers concluded that not using any hand sanitizer would lead to the
least bacterial growth.
which statement best explains why the researchers' conclusion was not justified?
the experiment tested too many variables.
the control group was not treated the same as the experimental group.
the sample size of twenty-four petri dishes is not large enough.
the single type of bacteria is not adequate to make any conclusions.
Answers: 2
Biology, 21.06.2019 23:00, MayFlowers
Approximately 90% of all cases of polycystic kidney disease are inherited in an autosomal dominant fashion. the disease is typically related to mutations to genes (pkd1 and pkd2). pkd genes can be found on chromosome 16. the disease occurs in approximately 1: 800 to 1: 1000 people. here is a hypothetical example. the dominant allele d will cause the development of pkd. the recessive allele is known as d. what genotypes would correspond to suffering from pkd? dd, dd what genotypes would correspond to being normal (not suffering from pkd)? dd consider that 1: 1,000 people have pkd in your population of 325million. consider that pkd is inherited in an autosomal dominant fashion. show you math for all of the following questions: what is the genotypic frequency for dd? what is the genotypic frequency for dd? what is the genotypic frequency for dd? what is p? what is q? how many people in your population would have pkd?
Answers: 3
Biology, 22.06.2019 06:30, denisturcios18
Mitosis creates two identical daughter cells from one parent cell creates four nonidentical daughter cells from one parent cell is the most common type of reproduction for bacteria is the process by which male and female reproductive cells are created
Answers: 1
Researchers conducted an experiment to identify the effects of three different hand sanitizers on th...
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