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a chromosome contains one long molecule.
each gene in this molecule gives the instructions for making a
both chromosomes in a pair of chromosomes have the same genes, but the genes in these two chromosomes may have different

biology is the study of life. it is the study of living organism.

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.