If you compared two samples of DNA at three different locations in the genome and found they had different lengths of short tandem repeats at each location, what could you conclude?
A) The two samples came from the same individual.
B) The two samples came from females.
C) The two samples came from males.
D) The two samples came from different individuals.
Answer: D
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The major advantage of immunofluorescent microscopy assays is that:
a. extensive training is not necessary. b. it serves as an excellent way to preserve the reaction for referral and archiving. c. visual assessment of the adequacy of a specimen is possible. d. fluorescent microscopes are easily ac-cessible to most laboratories.
The endocrine gland that controls homeostasis in terms of blood glucose levels is the
A. parathyroid gland. B. adrenal gland. C. pineal gland. D. pancreas. E. testis.
Why is Pacific salmon movement into freshwater streams considered migration if the salmon die at the head of the stream and never return to the ocean?
A) It is not considered migration but immigration. B) Migration is a one-way movement. C) Because their offspring return to the ocean, the entire population participates in the migratory event via different life stages. D) Most male adult fish survive reproduction and return to the ocean.
B cells:a
are produced in the adult spleen. b. lyse bacterial cell walls by secreting digestive enzymes. c. can become plasma cells, which produce interleukins. d. undergo clonal reproduction once activated. e. stimulate apoptosis.