1 Select the example that describes a non-native species. A species of parrot has evolved to occupy a key niche within the Amazon rainforest ecosystem. Domestic livestock multiplied rapidly throughout eastern North America after their introduction by English colonists. Populations of deer and wolves in Arizona have evolved in relationship with each other. This particular species of orchid has remained within the same environment for hundreds of years.

2 Population ecologists study which of the following characteristics? Number, density, age, and sex of organisms. Temperature regulation, nutrition and metabolism of organisms. Composition, distribution and interaction of species in a given area. Atmosphere, rocks, water and living organisms.

3Choose the statement that is NOT true about conditions within the given biome. Temperate grasslands are in the wetter areas of the temperate zone. Steppes are cold grasslands with little precipitation. All deserts have extremely low precipitation levels. Tundras are very cold with very little rainfall.

4“Rain, snow, wind and temperature all pertain to what we call ‘weather,’” the teacher said. “Climate is the weather in a location over many years. Now, who can tell me what determines the climate in a certain area?” Several students offered answers. Choose the correct answer. Andrea: “The air and land temperatures.” Shane: “The composition of gases in the atmosphere.” Judith: “The amount of precipitation that falls.” Carl: “The area’s physical features.”

5Large rocks at the back of a beach cause the wind speed to slow. Windblown sand begins to drop and build small sand piles, which create another windbreak and more sand is deposited. Gradually, salt-tolerant grasses will begin to stabilize the sand dune with a vast network of root systems. The process described is called __________. community ecology primary succession secondary succession ecosystems ecology

6.Which statement is NOT true about energy and trophic levels within a food web? The rate at which energy accumulates in plants depends on temperature, sun and water. About 90% of the energy available at one trophic level does not transfer to the next. Most of the energy between trophic levels is lost in the form of metabolic heat. Secondary production introduces only 1% of new energy to the food chain.

Public Answer

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