Question

the differences seen within and among species such as fur color, eye color, etc.

○ evolution

○ natural selection

○ speciation

○ variation

○ genetic drift

○ gene flow

○ frequency

Explanation:

To solve this, we analyze each option:

• Evolution: The process of species change over time, not directly about differences like fur/eye color.
• Natural Selection: Mechanism where favorable traits are selected, not the differences themselves.
• Speciation: Formation of new species, not about trait differences within/between species.
• Variation: Defined as differences in traits (like fur color, eye color) within and among species.
• Genetic Drift: Random change in allele frequencies, not about visible trait differences.
• Gene Flow: Transfer of genes between populations, not about trait differences.
• Frequency: Usually about how often an allele/trait occurs, not the differences.

So the correct term for differences in traits within/among species is variation.

Answer:

D. variation