Speciation

Open Ended

What is a species? What makes two species different?

Multiple Choice

According to the biological species concept, what is required for a group of populations to be considered a species?

• They must look similar to each other.

• They must be able to interbreed and produce viable, fertile offspring.

• They must live in the same habitat.

• They must have similar DNA sequences.

Multiple Choice

Which of the following is NOT a way that prezygotic barriers block fertilization from occurring?

• Impeding different species from attempting to mate

• Preventing the successful completion of mating

• Hindering fertilization if mating is successful

• Allowing gametes to freely mix between species

Open Ended

Explain how habitat isolation prevents two species from mating.

Open Ended

How does temporal isolation prevent interbreeding between two species?

Open Ended

Explain how behavioral isolation prevents two species from mating.

Open Ended

Why are mules not considered a species?

Open Ended

Why can the biological species concept not be applied to fossils or asexual organisms?

Multiple Choice

Which of the following statements about the morphological species concept is correct?

• It only applies to sexual species

• It relies solely on genetic information

• It is useful for classifying fossils where genetic information is unavailable

• It emphasizes the separateness of different species

Multiple Select

Select all concepts that apply to both sexual and asexual species.

• Morphological species concept

• Ecological species concept

• Phylogenetic species concept

• Biological species concept

Open Ended

What is allopatric speciation?

Open Ended

Explain sympatric speciation.

Multiple Choice

True or false: Hybrids are usually more viable and fertile than parent species.

• true

• false

Multiple Choice

What type of hybrid zone forms when hybrids are less fit than parent species and over time, the rate of hybridization decreases, causing the two species to remain separate?

• reinforcement

• fusion

• stability