Environment Review. Powerpoint Templates. Page 1
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1 Environment Review Powerpoint Templates Page 1
2 Question 1 Which organisms in the food web above can be described as both primary and secondary consumers? a primary consumer feeds on plants and a secondary consumer feeds on a primary consumer The only organism which does both is the raccoon (eats the grass and the mice) Powerpoint Templates Page 2
3 Question 2 In Central America there is a tree called bullhorn acacia that provides both food and shelter to a certain species of ant. The ants live within the tree without causing it harm. In fact, the ants protect the tree by vigorously attacking and stinging other animals that try to eat it. This relationship is an example of mutualism Powerpoint Templates Page 3
4 Question 3 Based on the food web above, which would have a greater impact the disappearance of the grasshoppers or the rabbits? Explain your reasoning. The loss of the grasshoppers would have a greater effect because it is the only food source for the frogs. The predators of the rabbit have other food sources Powerpoint Templates Page 4
5 Question 4 Which of the following statements describes this pyramid? A) There are more plants than consumers in nature. B) In a food chain, there is always a 10 % transfer of energy. C)There are fewer decomposers in nature because of the pesticides used by man. D) Animals are either herbivores, carnivores, or omnivores. Powerpoint Templates Page 5
6 Question 5 Explain why all the energy of one organism is not totally transformed to the next member of the food chain. What does it mean, in terms of energy, if you are higher on the food chain or food pyramid? Much of the energy taken in by an organism is used for the life process of the organism and then lost through heat and waste products If you are higher on the food pyramid you need to consume more food to get the energy you need Powerpoint Templates Page 6
7 Question 6 Here is an example of a food chain: plankton - krill - small fish - salmon - bald eagle. How would the community most likely change if the krill were removed? A) The plankton population would decrease. B) The salmon population would increase C) The small fish population would increase. D) The bald eagle population would Powerpoint Templates Page 7
8 Question 7 Which is of the following is a natural disturbance? A) Hurricane B) Building fences C) Farming D) Pollution Powerpoint Templates Page 8
9 Question 8 A forest fire has destroyed all plant life in a vast region. Which trophic level would be the last one to disappear? Explain. The decomposers because their will be a lot of dead matter to decompose Powerpoint Templates Page 9
10 Question 9 Trophic level 3 rd level consumer Decomposer Herbivore Producer Canada Lynx none Organism Rabbit, mouse, ladybug, deer Grass, veges, bushes, trees Powerpoint Templates Page 10
11 Question 10 A community in which barn owls and snakes consume only mice is being observed. If the number of snake increases, what is most likely to happen first? The mouse population will decrease because the number of predators have increased Powerpoint Templates Page 11
12 Question 11 What factors affect the distribution of terrestrial biomes? What factors affect the distribution of aquatic biomes? Terrestrial Latitude Altitude Temperature Precipitation Sunlight Winds Water Aquatic Salinity Water clarity Temperature Current Oxygen and carbon dioxide Sunlight Nutrients Water depth Powerpoint Templates Page 12
13 Question 12 Explain the difference between a fresh water biome, an ocean biome and an estuary biome It has to do with the salt content. Fresh water has less than 1% salt content while ocean water has more Estuaries are areas where fresh water and salt water mix Powerpoint Templates Page 13
14 Question 13 Explain how matter is chemically recycled in an ecosystem. Producers take inorganic matter and transform it into organic matter Consumer take in the organic matter and pass it through the food chain. The organic waste products of consumers and producers are then decomposed by bacteria to be recycled into inorganic matter again ready for the producers to use Powerpoint Templates Page 14
15 Question 14 What determines the biodiversity of an ecosystem? The number of different species (the more species the more diverse) The relative abundance (# of organisms of a species/total number of organisms in the ecosystem) the closer the relative abundances, the more diverse Powerpoint Templates Page 15
16 C more types of species than A and B (species rich) The species are more equally distributed than D Question 15 Which of the diagrams below show the community with the greatest biodiversity? Explain your answer. Powerpoint Templates Page 16
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