Question

chapter 17, 18, & 19 study questions
classify the following characteristics based on what species concept is described.
4 points
morphological species concept
evolutionary species concept
phylogenetic species concept
biological species concept
requires shared evolutionary pathway
cannot be tested in nature
distinguishes species with diagnostic traits: distinct physical characteristics
it was proposed to explain speciation in the fossil record.
relies on reproductive isolation to identify different species
not useful for microorganisms or cryptic species
identifies species based on a common ancestor
does not rely on morphological traits; useful for microorganisms and cryptic species

Explanation:

To solve this, we match each species concept with its defining characteristics:

Morphological Species Concept

• Right column (defining trait): Distinguishes species with diagnostic traits: distinct physical characteristics (relies on observable physical traits).
• Left column (limitation/feature): Does not rely on morphological traits; useful for microorganisms and cryptic species? No, wait—Morphological Species Concept does rely on physical traits. Wait, correction: Morphological Species Concept uses physical traits to distinguish species. So the left column for it: Not useful for microorganisms or cryptic species (since microbes/cryptic may have similar morphology). Wait, let's re-express:

Step 1: Morphological Species Concept

• Defining trait: Distinguishes species with diagnostic traits: distinct physical characteristics (matches "Distinguishes species with diagnostic traits: distinct physical characteristics").
• Limitation/feature: Not useful for microorganisms or cryptic species (matches "Not useful for microorganisms or cryptic species").

Step 2: Evolutionary Species Concept

• Defining trait: Requires shared evolutionary pathway (matches "Requires shared evolutionary pathway").
• Limitation/feature: It was proposed to explain speciation in the fossil record (matches "It was proposed to explain speciation in the fossil record").

Step 3: Phylogenetic Species Concept

• Defining trait: Identifies species based on a common ancestor (matches "Identifies species based on a common ancestor").
• Limitation/feature: Cannot be tested in nature (matches "Cannot be tested in nature").

Step 4: Biological Species Concept

• Defining trait: Relies on reproductive isolation to identify different species (matches "Relies on reproductive isolation to identify different species").
• Limitation/feature: Does not rely on morphological traits; useful for microorganisms and cryptic species (matches "Does not rely on morphological traits; useful for microorganisms and cryptic species").

Final Matching (Table Format):

Species Concept	Defining Trait (Right Column)	Limitation/Feature (Left Column)
Evolutionary Species Concept	Requires shared evolutionary pathway	It was proposed to explain speciation in the fossil record
Phylogenetic Species Concept	Identifies species based on a common ancestor	Cannot be tested in nature
Biological Species Concept	Relies on reproductive isolation to identify different species	Does not rely on morphological traits; useful for microorganisms and cryptic species

(If the task is to drag-and-drop, the above table shows the correct pairings.)

Answer:

• Morphological Species Concept:
• Defining: Distinguishes species with diagnostic traits: distinct physical characteristics
• Limitation: Not useful for microorganisms or cryptic species
• Evolutionary Species Concept:
• Defining: Requires shared evolutionary pathway
• Limitation: It was proposed to explain speciation in the fossil record
• Phylogenetic Species Concept:
• Defining: Identifies species based on a common ancestor
• Limitation: Cannot be tested in nature
• Biological Species Concept:
• Defining: Relies on reproductive isolation to identify different species
• Limitation: Does not rely on morphological traits; useful for microorganisms and cryptic species