Cryptosporidium parvum causes gastrointestinal

a. Chagas disease.
b. cryptosporidiosis.
c. giardiasis.
d. hemolysis.


Answer: B

Biology & Microbiology

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Inbred lines of animals, such as laboratory mice, are useful for studying complex traits because:

A. individuals are genetically identical, so differences in traits must be due to environmental differences. B. although individuals differ both genetically and environmentally, the genetic differences are known, so differences in traits can be understood. C. animals are kept in identical environments, so any differences in traits are due to differences in their genes. D. both genetic and environmental differences between individuals are known, making differences in their traits easy to understand. E. None of these choices is correct.

Biology & Microbiology

Which of the following is a character in

phylogeny? a. number of digits b. DNA sequence for a gene c. amino acid sequence of an enzyme d. number of petals e. all of these

Biology & Microbiology

The blood supply flowing to the main body mass is

indicated by a. A. b. B. c. C. d. D. e. E.

Biology & Microbiology

For which two species concepts are anatomical features the primary criterion for determining species identities?

1. biological 2. ecological 3. morphological 4. phylogenetic 5. paleontological A) 1 and 2 B) 1 and 3 C) 2 and 3 D) 3 and 5 E) 4 and 5

Biology & Microbiology