Question

5
multiple choice 2 points
great dane
chihuahua
collie
saint bernard
(a) ancestral wolf
what process is illustrated in this diagram showing the development of different dog breeds from an ancestral wolf?
artificial selection driven by human choices in breeding
genetic drift due to random chance in small populations
speciation caused by geographic isolation
natural selection resulting from environmental pressures

Explanation:

Artificial selection is when humans choose which organisms breed based on desired traits. In dog breeding, humans select for specific characteristics (like size, coat type, etc.) in the ancestral wolf lineage to create different breeds. Genetic drift is random change in allele frequencies (not related here). Speciation by geographic isolation involves separation of populations (not shown). Natural selection is due to environmental pressures (not human - chosen traits here).

Answer:

Artificial selection driven by human choices in breeding