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1. Hawaiian honeycreepers are a group of birds with similar body shape and size. However, they vary greatly in color and beak shape. Each species occupies its own niche and is adapted to the foods available in its niche. The evolution from a common ancestor to a variety of species is an example of _____.
divergent evolution
cross-pollination
vegetative propagation
convergent evolution
2. _____ selection favors one extreme form of a trait in a population.
Directional
Stabilizing
Disruptive
Natural
3. Which answer BEST shows an animal’s adaptation to the tropical rain forest?
camouflage in a tree frog
the long neck of a giraffe
an elephant’s long trunk
migration of birds in winter
4. Upon close examination of the skeleton of an adult python, a pelvic girdle and leg bones can be observed. These features are an example of _____.
artificial selection
homologous structures
vestigial structures
comparative embryology
5. Which of the following is not a factor that causes changes in the allelic frequencies of individuals in a population?
stabilizing selection
directional selection
random selection
disruptive selection

1.
Hawaiian honeycreepers are a group of birds with similar body shape and size. However, they vary greatly in color and beak shape. Each species occupies its own niche and is adapted to the foods available in its niche. The evolution from a common ancestor to a variety of species is an example of _____.
(1 point)
divergent evolution
cross-pollination
vegetative propagation
convergent evolution
2.
_____ selection favors one extreme form of a trait in a population.
(1 point)
Directional
Stabilizing
Disruptive
Natural
3.
Which answer BEST shows an animal’s adaptation to the tropical rain forest?
(1 point)
camouflage in a tree frog
the long neck of a giraffe
an elephant’s long trunk
migration of birds in winter
4.
Upon close examination of the skeleton of an adult python, a pelvic girdle and leg bones can be observed. These features are an example of _____.
(1 point)
artificial selection
homologous structures
vestigial structures
comparative embryology
5.
Which of the following is not a factor that causes changes in the allelic frequencies of individuals in a population?
(1 point)
stabilizing selection
directional selection
random selection
disruptive selection

2. The stable ecosystem that develops due to succession _____.
(1 point)
is called a niche
is always a forest
is called a climax community
never changes
Figure 3-6
3. Look at the graph in Figure 3-6. Approximately how many hours of sunlight should these plants receive each day in order to make them grow at their optimum level?
(1 point)
4
12
16
20
4. Water temperature and light are two ____________________ factors that affect the tolerance range of organisms in a lake.
(1 point)
5. Tropical rain forest and ____________________ biomes are both characterized by a thin layer of nutrient-poor topsoil that can support only shallow-rooted plants.
(1 point)
6. Fires, natural disasters, and human intervention are possible causes of ____________________.

2. What is the correct term for only the biotic factors in a tropical rain forest?
community
habitat
ecosystem
niche