Florida International University

PCB evolution

Chapter 3

1)According to the Biological Species concept formally proposed by E. Mayr in 1942, two organisms belong to the same species when ...

1. they share significant structural homologies
2. they actually or potentially interbreed
3. they share significant functional homologies
4. they share a common geographic distribution

2. How many steps are usually required for speciation to occur?

1. 4
2. 2
3. 3
4. 1

3. Vestigial traits like the coccyx or the hair follicle muscles from humans are ...

1. evidences of uniformitarianism
2. evidences against speciation
3. evidences supporting that the Earth is 4.6 billion years old
4. evidences supporting species change trought time or microevolution

4. Transitional forms are ...

1. not found in the fossil record
2. only found in the fossil record
3. not predicted by the Theory of Descent with Modification
4. species showing a mix of features between ancestral populations and later descendants

5. Homologous structures are those ...

1. similar in function
2. similar in shape
3. similar only in shape
4. sharing a common evolutionary origin

6. The Theory of Descent with Modification predicts that a region's extant plants and animals will be most similar to fossils ...

1. from transitional forms
2. from completely different regions
3. from regions with the same environment
4. from the same region

7. The evidence demonstrating that the Earth is 4.6 billion years old was critical to validate the Theory of Descent with Modification because ...

1. it is enough time for the evolutionary diversification of species on Earth to occur
2. it fits the predictions of Charles Darwin
3. it reveals that the Earth was not created by God
4. it is in agreement with the age of the oceans

8. Speciation ...

1. occurs preferentially in the sea of Japan
2. is a very slow process that will only be observed in experimental populations of rapidly reproducing bacteria
3. requires three steps that are only observed in experimental populations of rapidly reproducing bacteria
4. is a gradual process

9. Fossils constitute evidences of…

1. speciation
2. macroevolution
3. reproductive isolation
4. microevolution