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Unit 6 Review
Test Description: Review of biodiversity and succession
Instructions: Answer all questions to get your test result.
1) What is the relationship between ecological succession and equilibrium in an ecosystem?
A
Ecological succession prevents ecosystems from ever reaching equilibrium.
B
Ecological succession and equilibrium are the same thing.
C
Ecological succession helps maintain equilibrium in an ecosystem.
D
There is no relationship between ecological succession and equilibrium.
2) Which of the following situations contributes to stability in an ecosystem?
A
reduction in biodiversity
B
removal of many populations of organisms
C
increase in biodiversity
D
extinction of a population from the ecosystem
3) A species that is responsible for primary succession in an ecosystem is MOST likely able to-
A
survive any predator
B
migrate in the winter
C
live at high altitudes
D
carry out photosynthesis
4) Which plant would appear first in secondary succession?
A
flowering plants
B
grasses
C
shrubs
D
native trees
5) What is the MOST serious threat to biodiversity?
A
loss of natural habitat
B
climate change
C
pollution
D
global warming
6) The more diverse an ecosystem is-
A
the fewer varieites of species are present
B
the more similar the species will be
C
the more stable it is
D
the more threatened its populations are
7) After a hurricane hits the coast what will happen next?
A
primary succession
B
secondary succession
C
a microhabitat
D
biodiversity
8) What is the primary limiting factor in the desert?
A
elevation
B
space
C
moisture
D
food source
9) To find the area of a leaf, which tool would be used?
A
hand lens
B
ruler
C
microscope
D
balance
10) Which would be a sign of fertile soil?
A
Small pieces of rock
B
Large mass of earthworms
C
Small mass of earthworms
D
Chunks of rocks
*select an answer for all questions
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