Thermoactinomyces vulgaris is the causative agent for ________.
A. cystic fibrosis
B. primary atypical pneumonia
C. vaginitis
D. farmer's lung disease
Answer: D
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What evolutionary advantage do flowers provide to angiosperms?
a. They metabolize sunlight faster than in plants without flowers. b. They prevented predation by herbivores, as their bright colors served as a warning to keep away. c. They developed a cooperative evolutionary relationship with pollinators, which delivered pollen to female gametophytes more directly. d. They provided shade and protection from sunlight in hot climates.
Fluid that leaves the capillaries is returned to the blood by the ____
a. carotid artery b. arterioles c. arteries d. lymphatic system e. hepatic portal system
Germination inhibitors that must be digested by acids in order to be removed help to ensure the seed will be dispersed with some fertilizer.
Answer the following statement true (T) or false (F)
Consider the model for the equilibrium number of species in a mainland (continental) region, as illustrated in Figure 20.23. What does this model say about the rate of speciation?
A) The rate of speciation decreases as a linear function of the number of species. B) The rate of speciation increases as a linear function of the number of species. C) The rate of speciation increases as a function of the number of species, but the rate of increase decelerates as the number of species becomes large.