AnswersEnvironmental Science ASuccession and Extinction

Succession and Extinction — Unit test Answers

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1
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A quaternary consumer species would be expected to have a smaller population than a secondary consumer species.

A
T
B
F
2
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It is advantageous for a predator to prey exclusively on a single prey species.

A
T
B
F
3

The negative impacts of nonnative species generally outweigh the positive impacts.

A
T
B
F
4

Why might it be beneficial to regulate what species of plants and animals people are allowed to own in particular environments?

A
Some species might become invasive and destructive if they escaped.
B
Some species may be dangerous to humans.
C
Nonnative plants and animals should only be used for commercial purposes.
D
There is no reason to restrict an individuals’ right to own plants or animals.
5

While trees are not the largest level in the pyramid of numbers, they are still the base for both the pyramids of biomass and pyramids of energy.

A
T
B
F
6

Which of the following is true concerning hull fouling from commercial shipping and recreational boating?

A
It constitutes less than half of all nonnative species introductions.
B
The revenue brought in from these industries is relatively small.
C
It is difficult to prevent since ship hulls begin, conduct, and end voyages in water.
D
It is best combated by chemical treatments.
7

If predators A and B prey upon the same species and predator A is eliminated, the population of predator B will likely __________.

A
be eliminated
B
increase
C
decrease
D
remain the same
8

Populations of organisms that exhibit a high degree of variation have a greater chance for survival than populations of organisms that show little variation. This statement is

A
always true.
B
usually true.
C
rarely true.
D
never true.
9

What hypothesis did Darwin investigate by studying the breeding of pigeons with distinctive traits?

A
New species can appear gradually through small changes in an ancestral species.
B
The amount of variation in a population is related to the type of environment it lives in.
C
Organisms have only the number of offspring that are supported by the environment.
D
Some traits appear in each generation, while others seem to disappear in some generations.
10

What is most likely to happen to a population of mice that becomes isolated on an island?

A
Many different species will form as they evolve and fill different niches on the island.
B
The population of mice will adapt to life on the island but will still be able to breed with the mainland population.
C
Many different species that are capable of breeding with each other will form.
D
The population of mice will evolve into a new species of mouse that is adapted to all the different niches that are found on the island.
11

What term includes all the biotic and abiotic factors in an area?

A
ecosystem
B
population
C
community
D
organ
12

Which is an example of temporal isolation?

A
flowers that bloom in different months
B
birds that have different mating calls
C
fruit flies that mate in different locations
D
squirrels that have different fur colors
13

Which factors affect natural selection?

A
inheritance, isolation, adaptation
B
variation, overpopulation, adaptation
C
isolation, overpopulation, speciation
D
variation, inheritance, speciation
14

Explain why quaternary consumers occupy the top position in the pyramid of energy.

Answer not available
15

A student argues that two species of birds are the same species because they have similar body structures, similar DNA, and similar beaks. Another student argues that the birds are different species because they have different color patterns and have a different mating season. Which piece of evidence supports the second student's argument?

A
The birds have similar body structure.
B
The birds have similar beaks.
C
The birds have different color variations.
D
The birds have different mating seasons.
16

Which of the following could result in secondary succession?

A
the formation of a tall sand dune on a previously grassy beach
B
a vast glacier in motion forming a U-shaped valley in its wake
C
a volcanic eruption that covers most of what used to be a forest
D
an introduced species that destroys all the native plants in an area
17

Based on California’s experience with Caulerpa, the killer algae, explain why it is important to regulate the pet and aquarium trade.

Answer not available
18

Darwin’s finches evolved on an island. What is the main reason that islands often provide good examples of evolution?

A
They have many niches.
B
They have many organisms that live on them.
C
They allow for automatic biogeographic isolation.
D
They allow for many variations to exist in species.
19

Nonnative species disrupt ecosystems by _______.

A
increasing biodiversity
B
preventing the spread of disease
C
disrupting food chains
D
increasing the populations of native species
20

How does conservation affect biodiversity?

A
It helps to preserve climate change.
B
It decreases species diversity.
C
It helps to preserve biodiversity.
D
It decreases ecosystem diversity.

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