The extinction event at the end of the Permian affected only land-dwelling organisms. Indicate whether the statement is true or false
F
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Fats and oils are
A. proteins. B. nucleic acids. C. lipids. D. carbohydrates.
When firms within related industries cluster together in order to lower unit costs for all firms, this refers to industrial inertia
Indicate whether the statement is true or false
Zooplankton in the deep scattering layer (DSL) ________.
A. remain at the same depth during both day and night B. move away from the surface during the day C. scatter during the night, removing the DSL D. rise toward the surface during the day E. move away from the surface during the night
Biologists think there are four major reasons why we should work to prevent human activities from causing the extinction of other species. Which of the following is the exception?
A. Species are part of the earth's life support system. B. Most species contribute to services that support our economies. C. It will take 5-10 million years to rebuild the biodiversity. D. We need animals, especially rare animals, for zoos. E. Each species has a right to exist even if it isn't useful to us.