Match the following items with the correct phrases.
_______1. Organisms that live on dead and decaying organic matter are said to be __________.
_______2. The type of relationship that termites have with the cellulose-eating protozoa that live in their intestinal tract.
_______3. A symbiotic relationship that is beneficial to both parties (symbionts) is said to be a __________ relationship.
_______4. A lichen is an example of a __________ relationship.
_______5. A symbiotic relationship that is beneficial to one party (symbiont), but of no consequence to the other is said to be a __________ relationship.
_______6. The type of relationship that humans have with the Escherichia coli organisms that live in their colon.
_______7. A symbiotic relationship that is beneficial to one party (symbiont), and detrimental to the other is said to be a __________ relationship.
a. commensalistic
b. mutualistic
c. parasitic
d. saprophytic
e. synergistic
1. d. saprophytic
2. b. mutualistic
3. b. mutualistic
4. b. mutualistic
5. a. commensalistic
6. a. commensalistic
7. c. parasitic
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Grasses, palms, and orchids are examples of eudicots
a. True b. False
Historically, scientists described the human "normal microbiota" as those organisms that could be cultured from the human body. This represents a significant underestimate because_____
a. it is unethical to use human tissue for culturing microbes b. bacteria can be counted easily, but fungi are more problematic c. many microbes are resident only on a small portion of the population d. many microbes cannot be cultured in the laboratory
A decrease in blood pH would stimulate an increase in rate and depth of breathing.
a. true b. false
The primary effect of increasedPCO2 in the lungs is to cause ________ which ________ the ventilation-perfusion ratio back to a normal level.
A) bronchodilation : increases B) vasoconstriction : decreases C) vasoconstriction : increases D) bronchoconstriction : decreases E) vasodilation : decreases