Unit 2 Review Book-Based AP Practice MCQs

After a severe drought, the productivity in an ecosystem took many years to return to pre-drought conditions. This observation indicates that the ecosystem has:

• low resilience.

• high resistance.

• high resilience.

• low resistance.

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NGSS.HS-LS2-6

Intertidal communities are frequently disturbed by storms that generate large waves. Following a period of intermediate wave disturbance, a group of researchers examined the species richness of north and south Pacific intertidal communities. Several weeks after the disturbance, they found that northern communities had returned to their original state whereas southern communities were still recovering. This result suggests that northern intertidal communities:

• have greater resilience.

• experience more frequent disturbance.

• follow predictions of the intermediate disturbance hypothesis.

• have greater resistance.

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NGSS.HS-LS2-6

According to the data, in which state(s) would the lowest percentage of white pine trees be found?

• Pennsylvania and Georgia

• Pennsylvania

• Georgia

• Connecticut and Georgia

Tags

NGSS.MS-LS2-1

Researchers in North America collected data on tree abundance for a group of forest communities in the three states shown in the table below.

Which statement best describes the forest communities within each state represented in the table?

• A) Connecticut and Pennsylvania have equal species richness; Connecticut has the highest species evenness.

• B) Pennsylvania has the highest species richness; Connecticut has the highest species evenness.

• C) Connecticut and Pennsylvania have equal species richness; Georgia has the highest species evenness.

• D) Georgia and Pennsylvania have equal species richness; Georgia has the highest species evenness.

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NGSS.MS-LS2-1

According to the data in the table, in which state would the forest communities be least vulnerable to environmental disturbances?

• Connecticut, because it has the highest species richness, which increases the resistance of an ecosystem

• Georgia, because it has the highest species richness, which increases the resistance of an ecosystem

• Pennsylvania, because it has the highest species evenness, which increases the resistance of an ecosystem

• Connecticut, because it has the highest species evenness, which increases the resistance of an ecosystem

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NGSS.MS-LS2-2

A dramatic decline in genetic diversity could best be explained by which of the following?

• the bottleneck effect, because the number of individuals in the gene pool are rapidly reduced

• mutations, because random changes in genotypes reduces genetic diversity

• genetic drift, because genotypes are lost quickly within large populations

• the founder effect, because species need to migrate to other areas and are always able to do so quickly

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NGSS.MS-LS4-4

Two fish species in a single lake evolve from a single ancestor that once lived in the lake. This is a description of a(n)

• sympatric speciation

• fundamental niche

• allopatric speciation

• realized niche

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NGSS.MS-LS4-2

The range of abiotic and biotic conditions under which a species actually lives is the definition of a(n)

• realized niche

• allopatric speciation

• sympatric speciation

• fundamental niche

A stream divides a single turtle population into two isolated populations that evolve into two species. This describes a(n)

• allopatric speciation.

• realized niche.

• fundamental niche.

• sympatric speciation.

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NGSS.HS-LS4-2

NGSS.HS-LS4-5

Which sequence of secondary succession would be likely to occur after the disturbance shown in the photo?

• bare soil, lichens, mosses, grasses, deciduous trees

• bare soil, grasses and wildflowers, shrubs, sunlight tolerant trees, shade-tolerant trees

• bare rock, grasses and wildflowers, lichens, mosses, shrubs, coniferous trees

• bare rock, lichens, mosses, grasses, shrubs, mixed shade- and sunlight-tolerant trees

Tags

NGSS.MS-LS2-4