Question
A. Transpiration
С
Erosion
B. Nitrogen fixation by bacteria
D. Birds eliminating waste
2. Carbon dioxide is returned to the atmosphere primarily by
A. consumption by animals.
B) combustion and cellular respiration by consumers.
C. elimination of waste by animals.
D. photosynthesis by producers.
_ 3. Carbon cycles through the biosphere in all of the following processes EXCEPT
A. photosynthesis
B. transpiration
C. burning of fossil fuels
D. decomposition of plants and animals
4. Nitrogen fixation is carried out mainly by
A. humans
B
) plants
C. animals
D. bacteria
5. Which of the following steps of the water cycle is the only step that has to have living organis
to happen?
A. Transpiration
B. Condensation
C. Evaporation
D. Precipitation
2 = Short Answer (9 pts total)
Describe an example of how non-human living organisms participate in each of the cycles. List
name of the organism, the step of the cycle it is involved in, and what it does specifically in that
pts)
Name of Organism
Step Involved in
Descriptior
ter Cycle
bon Cycle
litrogen
Cycle
C If's Not Rocket Science 2020
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Answer
1. A. Transpiration - Plants release water vapor through small pores in their leaves, which is a part of the water cycle.
B. Nitrogen fixation by bacteria - Rhizobium bacteria in the roots of leguminous plants convert atmospheric nitrogen into a usable form for plants, which is a part of the nitrogen cycle.
C. Erosion - The movement of soil and rock by wind, water, or ice, which is not a part of any specific cycle.
D. Birds eliminating waste - Birds excrete nitrogenous waste in the form of uric acid, which is a part of the nitrogen cycle.
2. B) combustion and cellular respiration by consumers.
3. C. burning of fossil fuels - Fossil fuels are not a natural part of the carbon cycle.
4. D. bacteria - Nitrogen-fixing bacteria in the soil convert atmospheric nitrogen into a usable form for plants.
5. A. Transpiration - Water vapor released by plants through transpiration is a necessary step for precipitation to occur.
Example:
Name of Organism: Nitrosomonas bacteria
Step Involved in: Nitrogen Cycle
Description: Nitrosomonas bacteria convert ammonia into nitrite, which is a part of the process of nitrification in the nitrogen cycle.