Which of the following patterns in the fossil record would be an example of an organism evolving through punctuated equilibrium? a
a species of flower changing in shape, followed by a change in the beak shape in its preferred species of pollinator
b
whale species gradually changing from land-dwelling mammals that walked on four legs to marine mammals without legs
c
the shell shape of a species of snail remaining unchanged for millennia until it changes to an entirely different shape
d
dorsal fins appearing, disappearing, and reappearing in species of ancient aquatic reptiles, mammals, and fish

9. the history of life on earth is recorded in

(me out over the last several centuries, scientists have made the following broad observations while investigating several branches of the life sciences: -the fossil record shows that different types of organisms have existed at different times in earth's history. -many organisms have similar body structures that seem to be adapted to different ways of living in their environment. -organisms of different species often share similarities in stages of embryonic development. -many species share genetic similarities, and almost all organisms use the same basic building blocks to construct proteins. -often, the extent of two species' similarities can be predicted from their geographic closeness to each other. -a great deal of change has been observed among species that have experienced strong selective pressures through many generations. scientists have carefully considered and rigorously tested the observations listed above. when scientists offer a of these observations, they are making 1.) testable explanation, deductive explanation 2.) scientific interference, scientific law

Why does sexual reproduction result in more genetic variation in a species