What differentiates gram-positive bacteria from gram-negative bacteria?
A) Nutrient requirements
B) The appearance of colonies
C) The means of locomotion
D) The use of oxygen
E) The way the cell wall stains
E
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To measure the population of lake trout in a 250-hectare lake, 400 individual trout were netted and marked with a fin clip, then returned to the lake
The next week, the lake was netted again, and out of the 200 lake trout that were caught, 50 had fin clips. Using the mark-recapture estimate, the lake trout population size could be closest to which of the following? A) 160 B) 200 C) 400 D) 1,600 E) 80,000
Which tissue type is a sheet-like tissue with
one surface always facing a body cavity or an external environment?
a. dense connective b. muscular c. epithelial d. nervous e. loose connective
What is the frequency of the b allele?
A) 0.6 B) 0.4 C) 0.36 D) 0.48 E) 0.16
Of all organisms, prokaryotes are
a. the smallest. b. the most abundant. c. the most metabolically diverse. d. the most widespread. e. all of these