Which of the following is NOT a characteristic of protozoa?
A) Most exhibit asexual reproduction.
B) They are single-celled organisms.
C) They are eukaryotic organisms.
D) They are all photosynthetic.
E) They frequently possess cilia or flagella.
D
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The data in the previous graphs indicate that _____
A) a hybrid zone was established after the completion of the bridge B) there was no migration between the two squirrel populations after the bridge was completed C) gene flow occurred from one type of squirrel into the gene pool of the other type of squirrel D) two-way migration of squirrels occurred across the bridge, but without hybridization E) some northern squirrels migrated south, but no southern squirrels migrated north across the bridge
Which of the following virulence factors enable(s) bacteria to attach to tissues?
A) capsules B) endotoxin C) flagella D) pili
Unless a derived character state is lost or replaced by newer characters over evolutionary time, ____ can serve as
markers for ____ lineages that underwent adaptive radiation.
a. apomorphies; polyphyletic b. apomorphies; paraphyletic c. synapomorphies; monophyletic d. synapomorphies; polyphyletic e. synapomorphies; paraphyletic
Both pulse-field gel electrophoresis and Western blotting utilize electrophoresis in their procedures. When comparing the two procedures, which statement is true?
A. Pulse-field gel electrophoresis is excellent for identifying minute genetic differences among strains of one species of an organism. B. Pulse-field gel electrophoresis separates DNA fragments while Western blotting separates proteins. C. The presence of antibodies in a patient specimen can be identified in the Western Blot. D. Pulse-field gel electrophoresis is used for genetic analysis. E. All of the statements are true.