A hot t, tropical grassland with scattered trees is a: Savanna Tundra Boreal forest Desert Permafrost is a defining characteristic of which biome?: Steppe Desert

Best Writers environmental-science A hot t, tropical grassland with scattered trees is a: Savanna Tundra Boreal forest Desert Permafrost is a defining characteristic of which biome?: Steppe Desert

environmental-science

A hot t, tropical grassland with scattered trees is a: Savanna Tundra Boreal forest Desert Permafrost is a defining characteristic of which biome?: Steppe Desert

A hot t, tropical grassland with scattered trees is a: Savanna Tundra Boreal forest Desert Permafrost is a defining characteristic of which biome?: Steppe Desert Taiga Tundra The dominant plant type in temperate forest is: Forbs Coniferous trees Deciduous trees Succulents The chaparral biome can be found in: California Australia All answers are correct The Mediterranean Trees in the Boreal forest are adapted to conserve: Carbon Phosphorus Nitrogen Magnesium What is an endemic species? A species native to only one area A species dying from an unknown disease A robust group of organisms that dominate an ecosystem A broad group of pollinating insects Which of the following is a driver of species creation? Climatic stability All answers are drivers Temporal stability Habitat heterogeneity Pollinator ecosystem services are provided by which organism? Birds All are pollinators Bees Bat Why have scientists, farmers and politicians stored the world’s seed heritage on a remote island in the Arctic? Consistent temperatures and humidity for seed survival. If the facility’s climate control fails, the seeds will only freeze. All of these answers are correct. Polar bears and remoteness are great deterrents for terrorists. Scientists consider which of the following an important aspect of “biodiversity”? Ecosystems Genes Species All are important What percentage of the timber imported by the United States is potentially illegally harvested? 75% 50% 1% 10% What is the present day extinction rate? About 10 times faster than the background rate About 100 times faster than the background rate About equal to the background rate About 1000 times faster than the background rate What percentage of river lengths in the United States have been modified through damming and bank modification? 50% 20% 90% 10% Which of the following statements is TRUE about extinction? Extinction occurs when speciation rates increase dramatically The only large extinction event was 65 million years ago when the dinosaurs were killed. Extinction of more than half of the existing species on the planet has occurred roughly five times Plants, but not animals, have been known to recover from extinction Which of the following threats has had a large impact on biodiversity? Overharvesting All three are correct Exotic species Habitat loss When an invasive species is introduced, what is the potential consequence of that introduction? Increased predation on some native species All of the listed consequences can occur Extinction of economically important species Reduced predation on some native species The relationship between the populations of wild lynx and snowshoe hare is an example of what ecological interaction? Birth rates dynamics Nutrient cycling Territorial dominance Predator-prey interactions Energy is _________ as you move up the trophic levels. Lost Gained Created Conserved Where one species benefits from prolonged interaction with another species, while the other species neither benefits nor is harmed is called: Parasitism Commensalism Mutualism Advantagism

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