Using only the data available to you on this page, what is the absolute age (i.e., millions of years), or possible range of absolute ages, for when the conglomerate was deposited?
What will be an ideal response?
The conglomerate was deposited after eruption of the 150 million-year-old basalt flow and before intrusion of the 100 million-year-old dike; therefore, it is between 150 and 100 million years old.
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Two species of insects do not interbreed because their sexual organs will not fit together. This is an example of
A) allopatric speciation. B) sympatric speciation. C) a prezygotic reproductive barrier. D) a postzygotic reproductive barrier.
The annual likelihood of a tornado that kills 10 people is less than that of an earthquake killing the same number of people.
Answer the following statement true (T) or false (F)
________ are mounds and ridges of sand that are deposited by the wind
A) Ventifacts B) Desert pavements C) Blowouts D) Dunes
Regular lawn mowing selects for short-headed rather than tall-headed dandelions because
A. Short flowers can reproduce B. Short flowers have less competition when the lawn is mowed often C. Tall flowers are cut before they can produce seeds D. Short flowers spread their seeds farther E. Tall flowers spread their seeds farther