On the galápagos islands, darwin observes tortoises with domed and saddle-shaped shells. how did darwin’s observations of these tortoises with form the theory of evolution by natural selection?

layer 3 is younger than layer 6.

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.

garbage disposal because lysosomes dispose of old cell parts like garbage disposals dispose of old food.

answer; synapse;