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Ch. 55 - Ecosystems and Restoration Ecology

Chapter 27, Problem 1

Which of the following organisms is incorrectly paired with its trophic level? a. cyanobacterium—primary producer b. grasshopper—primary consumer c. zooplankton—primary producer d. fungus—detritivore

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Hello everyone. And in today's video we have the following problem which of the following organism arrangements shows the correct order based on the energy transfer from the highest concentration to the lowest concentration. And the way this question works is that it's all about food chains and how different organisms participating participating on a foot chain interact and transfer energy as they prey on each other. So let's quickly recall what these food food chain arrangements look like. And this is the way that they do. Primary producers are going to be the one producing most of the energy for the food chain. So they produce they take 100% of the energy. Primary consumers are going to be preying on these primary producers And so they're going to hold 10% of the energy in the food chain are going to take 10% of the energy for the food chain. These secondary consumers are going to be preying on the primary consumers. And they take 1% of the energy of the food chain. And these apex predators are going to be preying on basically everything that they can in the food chain as nothing can prey on them. And they take 0.01 or they represent 0.01 of the energy of the food chain. So there are a huge minority. And so now that we know how this food chain work. Let's look at our answer choices and identify the answer choice that begins with the primary producers, which is mostly plants and other types of organisms are able to produce their own energy. And as we can see the only two that start with these our answer choices A and B. Answer choice C. Has mice and answer choice, answer choice Diaz snake, snake in this case is the apex predator. Because nothing else from the answer choices provider can prey on snakes so that is going to be or apex predator. And answer choice C. Begins with mice and mice will prey on the grasshopper. And so my mice will be the secondary consumer in our food chain. And so we are going to cancel out both of these as they do not start with a primary producer. So answer choices A and B. Have the grasses, our prey upon by mice. In the case of answer choice A or that grasses are preyed upon by grasshoppers. In terms of the answer choice B. We know for a fact that mice do not really eat grass. This is eaten by grass. Grasshoppers which in turn are eaten by mice and the mice are eaten by snakes. So the correct order in terms of energy transfer on a foot chain is answer choice B. And that is actually our final answer for this question. So thank you very much for sticking around until the end of this video. This is going to be the end and I really hope it helped you