When lactose is ingested, allolactose serves as a(n) , binding to the repressor and removing it from the operator to allow for transcription to occur. a. operator
b. inducer
c. repressor
d. corepressor
e. operon

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

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