Question

what would be a good example of a primary consumer? a. carnivore b. detrivore c. decomposer d. herbivore 29. which of the following has the correct order of the trophic levels for a food web or chain. a. herbivores - decomposer - autotrophs - carnivores - b. decomposer - carnivores - autotrophs - herbivores c. producer - tertiary consumer - secondary consumer - primary consumer - decomposer d. producer - primary consumer - secondary consumer - tertiary consumer - decomposer 30. the arrows in a food chain or web represent what? a. they point to the organism that is being eaten. b. it shows how sunlight flows within an ecosystem. c. they show what direction the energy is flowing between organisms. d. they represent how water is transferred within a habitat. 31. producers are generally found at the beginning of a food chain. which statement best explains why this is true? a. producers are usually smaller in size than consumers. b. producers do not rely on other organisms for food. c. there are always more consumers than producers in food chains. d. consumers are always more complex organisms than producers. 32. which would be the most likely effect of a drastic reduction in all the producer organisms in a meadow environment? a. the grasshoppers would multiply rapidly. b. all of the snake populations would increase. c. the rabbit population would decrease. d. all of the decomposers would die. 33. food chains usually contain no more than ______ a. two organisms b. three organisms c. four organisms d. six organisms 34. which of these is not a goal of environmental science? a. learn how life on earth has lived and thrived for billions of years. b. understand how humans interact with the environment. c. understand how animals interact with humans. d. find ways to deal with environmental problems. 35. an organism that eats other organisms or organic matter instead of producing its own nutrients or obtaining nutrients from inorganic sources. a. consumer b. producer c. decomposer d. food chain 36. one of the steps in a food chain or food pyramid. a. food drive b. food web c. ddt d. trophic level

Explanation:

• For the question about primary consumer, herbivores eat producers (plants) and are primary consumers. Carnivores eat other animals, detrivores eat dead organic matter, and decomposers break down dead organisms.
• For the trophic - level order, it starts with producers (autotrophs) that make their own food, followed by primary consumers (herbivores), then secondary consumers (carnivores that eat herbivores), tertiary consumers (carnivores that eat other carnivores), and finally decomposers that recycle nutrients.
• In a food chain or web, arrows show the direction of energy flow from one organism to another.
• Producers are at the start of a food chain because they do not rely on other organisms for food as they can produce their own through photosynthesis.
• A drastic reduction in producers would lead to a decrease in primary consumers like rabbits as they rely on producers for food.
• Food chains usually contain no more than four or five organisms due to energy loss at each trophic level.
• The goal of environmental science is not about how animals interact with humans but about life on Earth, human - environment interactions, and dealing with environmental problems.
• An organism that eats other organisms or organic matter is a consumer. Producers make their own food, decomposers break down dead matter, and a food chain is a sequence of organisms in an ecosystem.
• The steps in a food chain or pyramid are called trophic levels. A food web is a complex network of food chains, and DDT is a pesticide.

Answer:

• 28. d. herbivore
• 29. d. producer - primary consumer - secondary consumer - tertiary consumer - decomposer
• 30. c. They show what direction the energy is flowing between organisms.
• 31. b. Producers do not rely on other organisms for food.
• 32. c. The rabbit population would decrease.
• 33. c. Four Organisms
• 34. c. Understand how animals interact with humans.
• 35. a. Consumer
• 36. d. Trophic Level