Answer Happy

Which of the following statements best describes allopatric speciation? Two closely related species of fish living in the same lake. Two closely related populations of squirrel living on different mountain tops. Two closely related populations of daisy living in the same meadow. Two closely related populations of birds living on the same island.
A horse is mated with a donkey resulting in a mule offspring which is sterile. This is an example of a barrier. hybrid breakdown; prezygotic hybrid breakdown; postzygotic reduced hybrid fertility; postzygotic reduced hybrid fertility; prezygotic
According to the Geologic Time Scale the first type of organisms on Earth were Non-flowering plants Prokaryotes Sponges Reptiles Marine worms
According to the Geologic Time Scale which of the following time periods represent diversification of bony fishes and the first appearance of amphibians and insects about 400 million years ago? Devonian Permian Jurassic Cambrian
Archaeopteryx, an extinct bird like organism from about 150 million years ago, had some features that were bird like and some features that were more reptilian. Which of the following features make it more like a small dinosaur as opposed to a bird? Feathers Teeth Claws on its feet Scales on its legs
Which of these human characteristics were shown to have evolved first with the discovery of "Lucy", Australopithecus afarensis? Enlarged brain Bipedalism (walking upright) Language Loss of body hair