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PCB 3043 Chapter 6 Questions and
Correct Answers/ Latest Update / Already
Graded
Why do distantly related species of plants in different parts of the
world often assume similar growth forms when they experience similar
climates?
-Plant growth forms are plastic and can change with environmental
conditions.
-Similar selection pressures cause convergent evolution of species in
separate lineages.
-Long-distance dispersal allows plant species to interbreed and acquire
similar traits.
-Plants that have similar traits descend from the same recent common
ancestor.
Ans: -Similar selection pressures cause convergent evolution of
species in separate lineages.
The climate diagram represents average annual temperature and
precipitation patterns of a biome. What does the information suggest
about growing conditions for plants in the biome it represents?
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-Low temperatures are the limiting factor of plant growth for most of
the year.
-Plants probably have adaptations to survive long periods of cold,
snowy weather.
-Plants only grow during the time of year when precipitation is highest.
-Summer temperatures are probably too high to support much plant
growth.
Ans: -Low temperatures are the limiting factor of plant growth
for most of the year.
-Plants probably have adaptations to survive long periods of
cold, snowy weather.
Why can temperate deciduous forests retain more of their soil fertility
than tropical rainforests after they are logged?
-In temperate deciduous forests, nutrients do not leach out of the
upper layers of soils.
-Most nutrients in tropical rainforests are stored in vegetation that is
carried away or burned.
-Temperate deciduous forests are more productive and replenish
nutrients quickly.
-Thick layers of clay and humus in tropical rainforests prevent soil
nutrients from being replenished.
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Ans: -Most nutrients in tropical rainforests are stored in
vegetation that is carried away or burned.
For each description of vegetation, identify the temperate biome:
The first temperate biome supports drought-resistant and fire-adapted
vegetation. Most plants are deeply rooted and have sclerophyllous, or
small, durable leaves. Dense growths of evergreen shrubs and grasses
are present.
Ans: Woodland or shrubland
For each description of vegetation, identify the temperate biome:
The second temperate biome has a dominant canopy of deciduous
trees but also supports some evergreen trees. There are smaller,
understory tree species, shrubs, and herbaceous plants. These
deciduous forests have the most diverse communities of spring-
flowering herbaceous plants.
Ans: Temperate seasonal forest
For each description of vegetation, identify the temperate biome:
All rights reserved © 2025/ 2026 |
PCB 3043 Chapter 6 Questions and
Correct Answers/ Latest Update / Already
Graded
Why do distantly related species of plants in different parts of the
world often assume similar growth forms when they experience similar
climates?
-Plant growth forms are plastic and can change with environmental
conditions.
-Similar selection pressures cause convergent evolution of species in
separate lineages.
-Long-distance dispersal allows plant species to interbreed and acquire
similar traits.
-Plants that have similar traits descend from the same recent common
ancestor.
Ans: -Similar selection pressures cause convergent evolution of
species in separate lineages.
The climate diagram represents average annual temperature and
precipitation patterns of a biome. What does the information suggest
about growing conditions for plants in the biome it represents?
All rights reserved © 2025/ 2026 |
, Page |2
-Low temperatures are the limiting factor of plant growth for most of
the year.
-Plants probably have adaptations to survive long periods of cold,
snowy weather.
-Plants only grow during the time of year when precipitation is highest.
-Summer temperatures are probably too high to support much plant
growth.
Ans: -Low temperatures are the limiting factor of plant growth
for most of the year.
-Plants probably have adaptations to survive long periods of
cold, snowy weather.
Why can temperate deciduous forests retain more of their soil fertility
than tropical rainforests after they are logged?
-In temperate deciduous forests, nutrients do not leach out of the
upper layers of soils.
-Most nutrients in tropical rainforests are stored in vegetation that is
carried away or burned.
-Temperate deciduous forests are more productive and replenish
nutrients quickly.
-Thick layers of clay and humus in tropical rainforests prevent soil
nutrients from being replenished.
All rights reserved © 2025/ 2026 |
, Page |3
Ans: -Most nutrients in tropical rainforests are stored in
vegetation that is carried away or burned.
For each description of vegetation, identify the temperate biome:
The first temperate biome supports drought-resistant and fire-adapted
vegetation. Most plants are deeply rooted and have sclerophyllous, or
small, durable leaves. Dense growths of evergreen shrubs and grasses
are present.
Ans: Woodland or shrubland
For each description of vegetation, identify the temperate biome:
The second temperate biome has a dominant canopy of deciduous
trees but also supports some evergreen trees. There are smaller,
understory tree species, shrubs, and herbaceous plants. These
deciduous forests have the most diverse communities of spring-
flowering herbaceous plants.
Ans: Temperate seasonal forest
For each description of vegetation, identify the temperate biome:
All rights reserved © 2025/ 2026 |
