The appalachian mountains are approximately 480 million years old, making them the oldest mountains in north america. the appalachian mountains are folded mountains that were once as high as 20,000 feet. now they reach to about 3,000 feet. how did these mountains form? a) folded mountains occur when two plates of the earth's crust separate. b) folded mountains are the result of many volcanoes erupting all at the same time. c) folded mountains form over millions of ears as sediments are deposited and build up. d) folded mountains occur when two plates of the earth's crust push against each other.

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.

What is the number of phosphates in an atp molecule

The fish shown above is a tarpon. it is a fast-swimming and powerful open-water fish. its closest relatives, oddly, are burrow-dwelling conger eels that stay on the bottom. both eels and tarpon developed from snake-like larvae that float in the plankton during the first stages of life. once they mature, tarpon and eels are not found near one another in the ocean. the tarpon and the eel illustrate all of the following except