Which of the following animals use positive pressure breathing to ventilate its lungs?

a. a bird
b. a frog
c. a dog
d. a reptile
e. a human


B

Biology & Microbiology

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Which neurotransmitter is not an amino acid derivative?

A) GABA B) serotonin C) histamine D) dopamine E) acetylcholine

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Which species of bacteria is responsible for causing diseases such as rheumatic fever, glomeru-lonephritis, and exudative pharyngitis?

a. Streptococcus agalactiae b. S. pyogenes c. S. pneumoniae d. Enterococcus

Biology & Microbiology

About half of all flowering plant species, including many important crop plants, are ____

a. polyploids b. haploids c. aneuploids d. monoploids e. diploids

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In the accompanying figure, what would structure A be made up as a gram-negative bacterium?

a. cellulose b. plasmids c. spirochetes d. peptidoglycan e. monosaccharides

Biology & Microbiology