1. The form of N least likely to be lost from an ecosystem is: a. N b. NH2 c. NO
ID: 155599 • Letter: 1
Question
1. The form of N least likely to be lost from an ecosystem is:
a. N
b. NH2
c. NO4
d. organic N
2. One likely reason that species diversity tends to be higher at lower latitudes is that lower
latitudes have:
a. greater variation in temperature
b. more isolated habitats
c. fewer pathogens
d. larger land areas
3. Nutrient availability in oceans tends to be highest:
a. near land
b. far from land
c. near the surface
d. halfway between the surface and the bottom
4. Predation should promote species diversity most if predators eat:
a. all prey species equally
b. seasonally instead of year-round
c. more competitive prey species more
d. adults rather than juveniles
5. The proportion of net primary productivity that becomes detritus instead of being consumed is:
a. small compared to the proportion eaten by herbivores
b. smaller in aquatic than in terrestrial systems
c. smaller when producers have a higher ratio of C to N
d. smallest where human influence has been greatest
6. Compared to herbivores, carnivores:
a. respire more of the energy they assimilate
b. excrete more of the energy they ingest
c. ingest less of the net production on the trophic level below them
d. have a higher overall efficiency of energy transfer between levels
7. Species diversity is best measured by:
a. species number
b. species evenness
c. species number and evenness
d. species niche breadths
Explanation / Answer
1. d. organic N
2. a. greater variation in temperature
3. c. near the surface
4. a. all prey species equally
5. c. smaller when producers have a higher ratio of C to N
6. b. excrete more of the energy they ingest
7. a. species number
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