What is a shared derived characteristic? what is example of this type of characteristic?

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."

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.