An action potential is a brief reversal of the
__________ potential. Fill in the blank(s) with the appropriate word(s).
Answer: membrane
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A urine sample with more than 100,000 organisms is considered indicative of infection. A urine sample containing 5,000 bacteria,with a generation time of 30 minutes,
sits for 3 hours before finally being assayed. How many bacteria will then be present within the sample? A. 10,000 B. 64,000 C. 100,000 D. 320,000
Which of the following do not undergo a dramatic change in form as they grow?
a. Silverfish. b. Dragonflies. c. Fleas. d. Crane flies. e. Luna moths.
In a long term study by the evolutionary biologists Endler and Reznick, they illustrated the effect of predation on life history traits by studying guppies with different predators: cichlids and killifish. The killifish preys mostly on immature, smaller guppies and cichlids pursue mature, larger guppies. They noticed that in river portions with only killifish, the guppies were larger than in
river portions with only cichlids. How did Endler and Reznick test whether these differences in life history traits were genetic? What will be an ideal response?
Single layer of cube shaped cells
A. Pseudostratified columnar B. Simple columnar C. Simple cuboidal D. Simple squamous E. Stratified squamous F. Transitional