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Some evolutionary biologists have argued that the neutral theory should be taken as the null hypothesis to explain genetic variation within species or populations and genetic differences among them. In this view, adaptation and natural selection should be the preferred explanation only if genetic drift cannot explain the data. Others might argue that since there is so much evidence that natural selection has shaped species' characteristics, selection should be the explanation of choice and that the burden of proof should fall on advocates of the neutral theory. Why might one of these points of view be more convincing than the other?
Once apoptosis starts, a detachment takes place in extra cellular matrix. This is calleda. In which organelle translation takes place inside the cell?
Receptor ligand interactions, the researcher wanted to narrow down exact region of binding between the receptor and the ligand.
Assume you are performing a reverse transcription reactions for high-throughput analysis using a 96-well plate format. Each 96-well plate is eight horizontal rows of wells by 12 vertical columns of wells.
All of the following illustrate why the bile acids are much better suited then cholesterol for use as emulsification agents for fats except.
If you analyze the diameter of the field of view for the 4X objective lens of a compound microscope with 10X oculars as 4.5 mm, what is the diameter of the field of view for the 100X objective lens?
Due to a spinal injury, a patient has lost pain and temperature sensation on the left half of his body from the waist down. Where is his injury? Where will you expect loss of tactile sensation in this patient.
In 2010, under its WaterSense program, EPA began promoting showerheads that produce still-lower flows of two gallon every minute.
How do codons relate to primary structure of proteins? Be able to construct a strand of messenger RNA from the sense strand of DNA (TRANSCRIPTION) and understand where this happens in a cell. How does the RNA differ from the DNA? How do mutations in ..
If you transform bacteria with the plasmid library made in part b above, divide the transformatnts into 20 aliquots and find one has the insert of interest, now how many clones do you need to screen.
make an experiment to test what happens (i.e. what is the final plasmid DNA content of cells in a transformed colony) if a competent cell is transformed with circular double-stranded plasmid DNA where there is a mis-match (e.g. a G-T base-pair ins..
What offspring phenotypes would you expect from mating between a 15-cm and 30-cm pig. How many pairs of genes are regulating the tail length character? (Hint: count the phentotypic classes, or find out the sum of the ratios of the classes)
Determine what position of the cardiac vector during the R wave gives identical signals in leads II and III? What does the ECG seen in lead I look like for this orientation of the vector?
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