Although birds and mammals descended from different ancestors, they both have a four-chambered heart. This is the result of Although birds and mammals descended from different ancestors, they both have a four-chambered heart. This is the result of convergent evolution. the simplification of the cardiovascular system. the necessity for rapid movement of blood. genetic aberrations that resulted from mistakes in somatic cell division.

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.

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.

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully