If trying to isolate a specific pathogen from amongst a variety of normal microbiota, which type of media would be most helpful?
A.) nutrient agar
B.) differential media
C.) blood agar
D.) selective and differential agar
D.) selective and differential agar
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How does a swim bladder help the ray-finned fishes maintain buoyancy?
A) It removes water from the digestive tract. B) It removes oxygen from the water and stores it. C) Gas is added to the bladder as the fish's depth increases. D) Gas is removed from the bladder as the fish's depth increases. E) It adds and removes salt from the water stored in the bladder, which changes its density and thus its buoyancy.
The number of animal species now known is about
A. 10 million. B. 100 million. C. 1 million. D. 15 million. E. 5 million.
DNA sequences comprising open reading frames (ORFs) correspond to the coding regions of genes called
____________________. Fill in the blank(s) with the appropriate word(s).
When examining the following figure, which assumption of the Hardy–Weinberg model is being presented?
a. random mating b. selfing c. migration d. mutation e. selection