If the foods preferred by each species are found on different parts of the island, and if the flies mate and lay eggs on their food sources, regardless of the location of the food sources, then the speciation events involving these fly species may have been driven, at least in part, by which of the following?
A) autopolyploidy
B) allopolyploidy
C) species selection
D) genetic drift
E) habitat differentiation
Answer: E) habitat differentiation
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Your dog becomes ill and you rush him to the veterinarian's office. A technician draws blood from your dog's leg for a vet-ordered lab test. After a few minutes the lab results are given to the vet, who immediately grabs a bottle from a shelf and begins to fill a syringe with an unknown fluid. You inquire about the fluid, and the vet informs you that the fluid is necessary to manage your dog's
metabolic acidosis. Based on the information provided, what is acidosis, and what is the likely effect of the veterinarian's injection? A. Acidosis means that your dog's blood pH has dropped from its normal level, and an injection of saline is required to reverse the condition. B. Acidosis means that your dog's blood pH has increased from its normal level, and an injection of saline is required to reverse the condition. C. Acidosis means that your dog's blood pH has decreased from its normal level, and an injection of buffering solution is required to reverse the condition. D. Acidosis means that your dog's blood pH has increased from its normal level, and an injection of buffering solution is required to reverse the condition.
After analysis of 100 pedigrees, the Zmax from the analysis of linkage between a disease gene D and the DNA marker P was found to be 3.5 at ? = 0.25. Which of the following is the best interpretation of these results?
A) No conclusion can be made regarding linkage of D and P. B) The evidence supports linkage of D and P at 25 cM. C) The evidence supports linkage of D and P at 2.5 cM. D) The evidence supports linkage of D and P at 0.25 cM. E) The evidence indicates that D and P are not linked.
Which of the following is not an example of a vestigial structure?
A. appendix in humans B. human gall bladder C. pelvis in a whale D. All of these are vestigial.
Osmotic pressure is the pressure created by the flow of water out of the cell.
A) True B) False