The odd proportions of dachshunds have resulted from Blank______.Multiple choice question.unintentional selectionartificial selection for dogs that could enter narrow badger holesan increased mutation rate in that dog breed

The great variety of breeds of cats, dogs and other domestic animals have arisen through Blank______.Multiple choice question.artificial selectionnatural selectionrandom genetic changes

A common criticism of evolution is that selection only produces Blank______ changes and cannot produce the variety of Blank______ documented in the fossil record.Multiple choice question.minor; breedsminor; speciessubstantial; extinctionssubstantial; breeds

According to some critics of evolution, natural selection can produce changes in a population, but it cannot cause substantial changes leading to Blank______.Multiple choice question.higher frequencies of the dark forms of the peppered moththe formation of an entirely new speciesthe formation of the different dog breedsdifferences between modern corn and its ancestor teosinte

In a classic experiment, scientists selected for fruit flies with many bristles on their abdomen by Blank______.Multiple choice question.picking out and breeding the 80% of the population that had the greatest number of bristlespicking out and breeding the 20% of the population that had the greatest number of bristles visually choosing and breeding flies that appeared to have relatively large bristles

The amount of genetic variation present in naturally occurring populations is Blank______.Multiple choice question.insignificantpractically nonexistentvery littlesignificant