Answers to Feeding Relationships Quiz

1.    4
2.    tree and grass
3.    4
4.    1
5.    The diving beetle population would decrease, because diving beetles eat snails.
6.    3
7.    2
8.    4
9.    2
10.  2
11.  3
12.  deer, rabbit, or grasshopper
13.  trees or grass
14.  The loss of metabolic energy (mostly to heat) when one organism feeds on another.
15.  grasses
16.  producer
17.  primary consumer
18.  secondary consumer
19.  There is a loss of energy to the environment as you move from one feeding level to a higher one.   The energy of a feeding level
       is reflected in its biomass.
20.  phytoplankton (we know this because it is the most numerous organism)
21.  2
22.  4
23.  1
24.  1  (they are both made from plants or producers)
25.  As you go between that many feeding levels, so much energy is lost that another feeding level can't be sustained.
26.  1
27.  1
28.  1
29.   Many answers are possible, including the small fish increase the amount of carbon dioxide in the water due to their respiration.
30.   dead organisms (that is what decomposers break down!)
31.   Decomposers recycle materials in this environment.
32.  2
33.  The algae carry on photosynthesis to make their food.
34.  4

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