A student makes a new gel using agarose, water, and buffer solution. The student loads their DNA samples in their wells and places the gel in the chamber for an appropriate length of time. When the student places the gel on the UV lightbox, no DNA bands show up at all. Even the marker lane is clear and has no bands! What mistake did the student make? Explain your answer.
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Biology, 21.06.2019 19:40
Asmall number of finches are removed randomly from the wild and placed in a protected bird area. they are given as much food as they need and have plenty of space. why would natural selection not occur in this population? a. there is no reason for genetic mutation to occur. b. the birds compete for limited resources, c. the population has not reached carrying capacity. d. there is no genetic variation in the finches.
Answers: 1
Biology, 22.06.2019 09:30
The “ecological footprint” left by a citizen of a developed nation is about four times larger than that left by a citizen of a developing nation. why is this the case?
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Biology, 22.06.2019 10:30
Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.
Answers: 3
Biology, 22.06.2019 14:00
Compare the shapes of the bones of the human skull with the shapes of the bones of the human leg. how do the shapes differ? why are the shapes important?
Answers: 1
A student makes a new gel using agarose, water, and buffer solution. The student loads their DNA sam...
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