Ch. 5 Evolution of Biodiversity ABCD 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100...

Ch. 5 Evolution of Biodiversity

A B C D

What is a reasonable estimate for the number of species currently alive on the planet

Answer:10 million

100 pts

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The physical expression of an organism’s genes is called its …

Answer:Phenotype

200 pts

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Which measure of biodiversity takes into account the number of species present and the relative abundance of the species present?

Answer:Shannon-Weiner index

300 pts

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Answer:1. True2. True3. False

400 ptsReturn to Review

T or F genetic variation decreases in the following

1. Bottleneck effect2. Genetic drift3. Mutation

Answer:

1. Species richness and species evenness.

2. polyploidy

500 pts

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1.What measurements are used to measure diversity within an ecosystem?

2.When does sympatric speciation occur?

An _______ is a trait that improves that individual’s fitness for an environment.

Answer:

Adaptation

100 pts

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What occurs when a small group from a population colonizes a new area?

Answer:

Founder effect

200 pts

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A flower with red petals produces purple petals, this is most likely the result of…

Answer:A genetic mutation

300 pts

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Answer:Bottleneck effect

When a population suddenly reduces in size either from habitat loss, natural disaster or other changes in the environment, its genetic variation is affected. This is known as…

Answer:1. False2. False3. True

T or F is NOT an example of geographic isolation

1. Founder effect2. Allopatric speciation3. Sympatric speciation

Approximately what percentage of species that have lived on the planet is thought to be extinct?

Answer:99%

100 pts

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In a small population, when genotypes are lost by chance it is called…

Answer:

Genetic Drift

200 pts

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Give an example of artificial selection.

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Answer:

Dog breeding, horse breeding

Answer:1. True2. True3. True

T or F Evolution occurs in the following1. Natural selection2. Genetic drift3. Artificial selection

Answer:1. Phylogenetic tree

2. notochord500 pts

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1. this diagram is known as…

2. which structure is the most primitive?

A variety of genes within a species is called its …

Answer:

Genetic diversity

What is most significant when determining the diversity of an ecosystem

Answer:

Number of species present

200 pts

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Which two scientist are credited with developing the theory of evolution by natural selection?

Answer:

Darwin and Wallace

300 pts

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A population of rabbits with typical variations of traits lives in a meadow with a depression running through the middle. Over time, the depression fills in with water and becomes a river, separating the one population into two. This is an example of….Answer:Allopatric speciation (geographic isolation)

400 pts

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Answer:

1. False

2. True

3. True

1. T or F All mutations are harmful.

2. T or F Phenotype can be affected by the environment

3. T or F Niche specialist are most vulnerable to environmental change

Answer:• …

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Answer:…

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Define limnetic, littoral, benthic and profundal zones.

Answers:

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Ch. 5 Evolution of Biodiversity ABCD 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100...

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