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BIOLOGY 101 UNIT 8 QUIZ
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BIOLOGY 101 UNIT 8 QUIZ
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1. What distribution pattern is the most common in the natural world?Clumped
2. The weakest symbiotic attachment, in which one species simply lives better in the
presence of another species, is
commensalism.
3. Biological magnification refers to the
accumulation of toxic pollutants as the compound moves through a food chain
4. Organisms that break down and feed on organic matter are ____.
Decomposers
5. A biome with grasses as primary producers and scattered trees adapted to prolonged
dry spells is known as a
savanna.
m
6. A particular biome is characterized by
er as
vegetation, animals, and climate.
co
eH w
7. All of the populations of different species that occupy and are adapted to a given area
are referred to by which term?
o.
Community
rs e
ou urc
8. Pioneer plant species are usually characterized by
small size and efficient dispersal mechanisms
o
9. Many introduced species have had deleterious effects on communities and
aC s
ecosystems because
vi y re
coevolved parasites and competitors are absent.
10. In itself, the spread of a disease causing bacteria in a population of rabbits is
a density-dependent factor.
ed d
ar stu
11. Which of the following represent an early stage in primary succession?
moss and lichens on bare rock
12. Darwin proposed that individuals with traits that help them live in their
is
immediate environment are more likely to survive and reproduce than individuals
without those traits. He called this
Th
natural selection.
13. A type III survivorship curve is characteristic of all but which species?
Humans
sh
14. The biggest impacts are made on the environment by:
Human interference
15. All the interconnected food chains in an ecosystem make up a ___.
food web
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