AnswersBiologyFactors Affecting Biological Diversity

Factors Affecting Biological Diversity — Quiz Answers

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A population of squirrels lived together in a forest. An event occurred that caused the population to diverge into two different species over a long period of time. Which of these is most likely the event that occurred?

A
The winters were unusually cold in the forest.
B
There was an increase in the predators in the forest.
C
A natural disaster occurred that separated squirrels.
D
A disease affected the squirrel population in the forest.
3

In a bird population, 50% of the individuals had white feathers, and 50% had colored feathers. Over time, it was observed that 98% of the population had colorful feathers. The rest had white feathers. How did the type of selection in this example affect the population’s biodiversity?

A
Directional selection did not increase the population’s biodiversity.
B
Ecosystem selection did not increase the population’s biodiversity.
C
Stabilizing selection increased the population’s biodiversity.
D
Disruptive selection decreased the population’s biodiversity.
4

Two insect groups vary genetically by two genes. When put together, they were able to reproduce and produce offspring that could also breed. Which best describes this insect population?

A
The insects are the same species.
B
The insects experienced reproductive isolation.
C
The insects are different species.
D
The insects experienced geographic isolation.
6

Which of these is the definition for speciation ?

A
a process by which organisms well suited to their environment tend to pass their traits onto offspring
B
a process by which one of the extreme variations of a trait is favored
C
an inherited or learned trait that increases an organism’s chance of survival in its environment
D
the evolutionary process through which new species emerge
7

Which organisms are most likely to survive in a population in which disruptive selection is occurring?

A
organisms that are the largest and strongest
B
organisms that have average traits
C
organisms that have the greatest number of offspring
D
organisms that have extreme traits
8

Which process drives Darwin’s theory of evolution?

A
artificial selection
B
ecosystem diversity
C
natural selection
D
population diversity
10

Which graph represents selection that may lead to reduced variation in a population?

A
Image with description A graph showing the original population as a single bell-shaped curve centered in the middle. The population after selection has two peaks at lower and higher trait values, with fewer individuals in the middle. Axes are labeled “Proportion of individuals” and “Trait Value.”
B
Image with description A graph showing the original population as a wide bell-shaped curve. The population after selection is narrower and taller at the same center. Axes are labeled “Proportion of individuals” and “Trait Value.”
C
Image with description A graph showing a single bell-shaped curve for the original population. The population after selection is a similar curve shifted to the right. Axes are labeled “Proportion of individuals” and “Trait Value.”
D
Image with description A graph showing the original population as a wide bell-shaped curve. The population after selection is also centered in the same place, but is wider and lower. Axes are labeled “Proportion of individuals” and “Trait Value.”

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