You discover a new microbe while working on a citizen scientist project. The microbe is taken to a lab that specializes in placing organisms in their correct phylogenic niche. In order to determine its evolutionary relatedness to other microbes, the lab carries out ________.
A. DNA fingerprinting
B. microscopic analysis
C. SSU rRNA analysis
D. biochemical tests
Answer: C
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A bone marrow transplant may not be appropriate from a given donor (Jane) to a given recipient (Jane's cousin Bob), even though Jane has previously given blood for one of Bob's needed transfusions, because _____
A) even though Jane's blood type is a match to Bob's, her major histocompatability (MHC) proteins may not be a match B) a blood type match is less stringent than a match required for transplant because blood is more tolerant of change C) for each gene, there is only one blood allele but many tissue alleles D) Jane's MHC class II genes are not expressed in bone marrow
An enzyme that starts the Calvin cycle reactions by catalyzing attachment of the carbon atom from CO2 to RuBP.
What will be an ideal response?
A person who sits for hours on a long airplane flight may have problems with blood pooling below the knees. Why?
A. The capillaries expand at high altitudes. B. The skeletal muscle pump below the knees is not helping blood return to the heart. C. The respiratory pump is not helping blood return to the heart. D. Blood pressure drops on long airplane flights. E. The valves in the leg veins don't work above a certain altitude.
A virologist wants to observe the three-dimensional surface features of virus particles she is studying. Which of the following microscopes would be most useful for her observations?
A. differential interference contrast B. atomic force C. scanning electron D. transmission electron E. atomic force or scanning electron