The causative agents of Chagas disease and African sleeping sickness are ____
a. trypanosomes
b. euglenoids
c. hydrogenosomes
d. diplomonads
e. parabasalids
ANSWER: a
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Energy gathering or concentrating mechanisms that allow light to be collected more efficiently during photosynthesis are called
A. mitochondria. B. photosystems. C. light-independent reactions. D. ribulose.
When an amino acid is converted to a keto acid, it
A. gains nitrogen. B. becomes a fatty acid. C. loses nitrogen. D. becomes a pyruvic acid.
Which of the following statements about parasitism is NOT true?
A. The host is generally larger than the parasite. B. Smaller parasites often live as endoparasites within the body of the host. C. Ectoparasites are attached to the outside of the host's body by specialized organs. D. Some organisms and all viruses are obligate parasites and must live inside a host. E. An efficient parasite usually kills its host.
Match the following items with the correct phrases.
_______1. Crenation of red blood cells would occur if they were placed into a(n) __________ solution. _______2. Adding large quantities of salt or sugar to various types of foods is a way of preserving them. If bacteria should enter such foods, they would find themselves in a(n) __________ environment. _______3. If red blood cells were placed into a(n) __________ solution, they might hemolyze. a. hypertonic b. hypotonic c. isotonic d. gin and tonic