Male zebra finches have brightly colored feathers and begin to sing at puberty. the females are duller in appearance and lack singing ability. the males use musical mating calls to compete with each other for female attention. since the females are primarily responsible for reproduction, they have to choose the most suitable males to mate with. this type of selection best illustrates the

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answer: b. nucleolus

explanation: nucleolus is a structure in the nucleus are ribosomes are made.

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: d

-charlie

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: d

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."