Differentiate between disease caused by Haemophilus influenzae and the disease caused by influenza virus.
A. One causes a mild flu, and the other causes a severe flu.
B. One organism causes symptomatic disease, while the other organism always causes asymptomatic disease.
C. One causes an upper respiratory disease, and the other causes a lower respiratory disease.
D. One organism is a virus while the other is a fungus.
Answer: C
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Looking at the figure above, what can be said about edge effects?
A) Biomass declines along edges of forest fragments. B) Biomass increases along the edges of forest fragments. C) Species diversity decreases along the edges of forest fragments. D) Fragmentation does not affect biomass.
Auxin concentration gradients
a. appear once germination begins. b. promote the transcription of an enzyme that breaks down cytokinin. c. allow formation of plant parts in expected patterns. d. help young cells elongate so that shoots and roots lengthen. e. are described by all of these EXCEPT "appear once germination begins."
Secondary succession occurs
a. after a fire. b. on a new volcanic island. c. on bare rock. d. on land exposed as a glacier retreats e. none of these answers
The source of calcitonin is the
a. pituitary gland. b. adrenal cortex. c. adrenal medulla. d. thymus gland. e. thyroid gland.