h.w. 2/12/2015

1, the 4 types of interactions are symbiosis, commensalism, mutualism, and parasitism.
2, abiotic
3, biotic
4, ecosystem
5, Community are all the organisms in one ecosystem, well population is all the organisms of one type
6, the biosphere is all the ecosystems together
7, producers create energy, where consumers eat producers to get energy
8, c
9, d
10, b
11, c
12, d
13, a
14, d
15, b
16, in a food web, energy flows from the bottom to the top though the animals.
17 the food web changed because the populations of the animals changed.
18, the two competitions are similar as both are fighting for the same thing.
19 limiting factors affect carrying capacity by lowering the amount of resources.
20, coevolution is when 2 animals evolve to take advantage of they’re symbiosis.
22, no, it needs scavengers to recycle the energy.
24 yes, there have been many things that wiped out much of the population, which are limiting factors
25 according to the pyramid there are more prairie dogs  than plants.
26 the vulture  level has the most energy.
27 an energy pyramid like this would not  appear in nature.
28 I would make the plant-part the biggest.