1. A change in allele frequencies in a population over a span of generations is . 2. Evolution that occurs by results in nonrandom reproductive success and adaptive change. 3. Evolution that occurs by results in a change in a population's gene pool due to chance. 4. Evolution that occurs by results in a change in a population's gene pool due to the movement of individuals into and out of the population.

answer: the answer is b

b. to discover aspects of the natural world.

hopefully i .

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.