1Which of the following is a biotic factor of an ecosystem
earthworms
2The Earth's largest biome is the African savanna. True or False
False
3Which of the following is not an example of commensalism:
a tapeworm living in the large intestine
4Which of the following gasses is responsible for the greenhouse effect?
carbon dioxide
5Which of the following is an example of a food chain?
algae--minnow--bass--raccoon
6Which of the following conditions would likely result in the most competition for food?
a deer and a rabbit in the meadow
7What is the most likely consequence of removing the snake and the hawk from this ecosystem?
It would cause the ecosystem to be out of balance, because the bird, frog, and mouse populations would grow out of control because they would have no predators. The beetle population would decrease since they all eat them. Plant populations would grow out of control also, since there would be fewer insects, like beetles, to eat them.
8Which of the following is not a part of the water cycle?
translation
9In the oxygen cycle ____________________________ is a process where oxygen is restored.
photosynthesis
10In the nitrogen cycle ____________________________ is the process where nitrogen gas is converted by bacteria into chemically active molecules that many organism can use.
nitrogen fixation