Imagine some cosmic catastrophe jolts Earth so that its axis is perpendicular to the orbital plane between Earth and the sun. The most obvious effect of this change would be ________.

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#Question id: 10604

#Section 1: Ecology

Which of the following statement are incorrect? 

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#Question id: 4640

#Section 2: Evolution

During drought years on the Galapagos, small, easily eaten seeds become rare, leaving mostly large, hard-cased seeds that only birds with large beaks can eat. If a drought persists for several years, what should one expect to result from natural selection?

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#Question id: 10875

#Section 2: Evolution

When the population density of species P , then

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#Question id: 16781

#Section 3: Mathematics and Quantitative Ecology

At Dunkin Donuts the number of donut holes in a bag can vary. Help Donald find the mode. 12,10,10,10,13,12,11,13,10

TLS Online TPP Program

#Question id: 4708

#Section 2: Evolution

The following questions refer to the figure below, which shows an outcrop of sedimentary rock whose strata are labeled A-D. If x indicates the fossils of two closely related species, neither of which is extinct, then their remains may be found in how many of these strata?