What is the speed of an object traveling 50 meters in 25 seconds? choose one: 1 m/s , 2 m/s , 3 m/s , 0.5 m/s
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What is a gene ? a) a section of a protein that codes for dna. b) the alternate version of a trait. c) the visible trait in the f1 generation. d) a section of dna that codes for a specific trait .

Classify the structures as homologous or analogous, depending on their structure and function.

Eutrophication caused by human nutrient pollution.