Topic Test Answers

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1
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If a stationary body of water has a constant temperature from top to bottom it is most likely a(n) _______.

A
lake
B
pond
C
ocean
D
lagoon
2
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How can an increase in biodiversity lead to an increase in ecosystem stability?

A
A more biodiverse ecosystem is not subject to change.
B
A more biodiverse ecosystem has a higher chance of adapting to species changes.
C
A more biodiverse ecosystem has fewer species types to balance.
D
A more biodiverse ecosystem is subject to fewer natural disasters.
3

The Great Burdock plant’s seeds have spines on them that attach to the fur of animals that brush against it. The seed then travels with the animal until it eventually falls off, which spreads the plant’s seeds farther than the plant could have done. What type of symbiotic relationship is this?

A
Mutualism
B
Commensalism
C
Parasitism
D
Competition
4

The inversion of terrestrial and aquatic energy pyramids is dependent upon the nature of that environment’s particular _______.

A
decomposers
B
climate
C
primary consumers
D
producers
5

Consider the following food chain:Garden plants are eaten by snails, which are eaten by birds, which are eaten by the household cat.

A
A
B
B
C
C
D
D
6

Which of the following is not an example of interactions between biotic and abiotic factors in an ecosystem?

A
flowers opening at dawn and closing at night
B
bears hibernating in winter
C
male elk fighting over a female
D
Monarch butterflies migrating to Mexico for the winter
7

Which of the following is a specialist species?

A
Giant Pandas
B
Horses
C
Humans
D
Rabbits
8

Variation of ecological habitats within a species is characteristic of which type of diversity?

A
Genetic diversity
B
Ecosystem diversity
C
Species diversity
D
Regional diversity
9

Which of the following is an example of symbiosis?

A
barnacles living on a whale’s skin
B
a tree obtaining nutrients from the soil
C
phytoplankton absorbing the sun’s rays
D
a blue whale feeding on zooplankton
10

Which of the following does not occupy the bottom of an energy pyramid?

A
phytoplankton
B
trees
C
grass
D
zooplankton
11

The competitive exclusion principle can lead to adaptation of organisms trying to occupy the same niche. Please select the best answer from the choices provided

A
T
B
F
12

The biomass pyramids for phytoplankton and trees in their respective environments are _______.

A
both inverted
B
the same
C
opposite
D
both normal
13

Explain which three marine habitats would have the least access to phytoplankton, and why.

Answer not available
14

The temperature stability of earth’s atmosphere is mostly due to _______.

A
the seasonal changes in day length
B
the rotation of earth about its axis
C
plant respiration
D
water in the oceans acting as a thermoregulator
15

Why is it that two species cannot occupy the same niche for an extended period of time?

Answer not available

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