In 1969 RH Whittaker proposed a 5 kingdom classification based mainly on?
a. Size and color of cells
b. Ability to reproduce and develop
c. Cell structure and how an organism derived nutrition
d. Electronic microscopy and biochemisrty
e. RNA sequence analysis
C
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What is the outermost layer of the digestive tract called?
A.) Mucosa B.) Submucosa C.) Muscularis D.) Serosa
The cytoskeletal component that consists of different protein types is
A) a microtubule. B) an intermediate filament. C) a microfilament. D) a fibrous filament.
Why would a drug that targets the process of reverse transcription in viruses not be a problem
for humans or other animals?
a. The drug is specific for RNA, and animals have DNA. b. Reverse transcription does not normally occur in animal cells. c. Reverse transcription in viruses uses different enzymes compared to the process in animal cells. d. The nucleotides in viral RNA contain some different bases and sugars compared to animal RNA.
What is the competitive exclusion principle? a. The isolation of groups in a large habitat
b. The number of predators in a given area. c. The effect of physical factors on consumers. d. A better competition drives a species to extinction when competing for the same limited resource.