Ecology Quiz Answer

Ecology Quiz Answer - Intro Biology 152, Ecology Online...

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Intro Biology 152, Ecology Online Quiz (Turner 2011) QUIZ (8 points) Questions 1-4, True/False (0.5 point each, 3 points total) 1. The roots and bark of the “tree of heaven” ( Ailanthus altissima ) produces an herbicide (ailanthone) that reduces the seedling growth of 11 deciduous tree species and 34 conifers in North America. The herbicide does not affect tree of heaven’s seedlings. This interaction is an example of symbiosis. ( F ) 2. The “tension zone” in Wisconsin is the ecotone separating the more northerly forest biome from the more southerly prairie/savanna. (T) 3. In deserts of the southwestern US, numerous plant species may live for many years without flowering. When the occasional wet summer occurs, these plants will flower, set fruit and die. These plants exhibit a life-history strategy known as iteroparity. (F) 4. When temperate zone lakes are stratified in the summer, the upper layer of water is warm, with high light and oxygen levels, whereas the water below the thermocline remains cool and is often nutrient rich. (T) 5. The concept of the demographic transition is a pattern of change in birth and death rates that has been observed in the human population in many parts of the world following
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This note was uploaded on 02/14/2012 for the course BIO 152 taught by Professor Doyle during the Fall '08 term at Wisconsin.

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Ecology Quiz Answer - Intro Biology 152, Ecology Online...

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