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Ecology Review Answer Key

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Photosynthesis
#1 What are the 4 ingredients for photosynthesis? Sun, chlorophyll, Carbon dioxide, water
#2 What is the "oven" for photosynthesis? Chloroplasts
#3 What is produced as a result of photosynthesis? Glucose and oxygen
#4 What is released as a waste product of photosynthesis? Oxygen
#5 When animals breathe out carbon dioxide, where does that carbon dioxide most likely go? Into a plant to be used to make glucose
Biotic/ Abiotic Factors
#1 What is a biotic factor? A living part of an ecosystem
#2 What is an abiotic factor? A non-living part of an ecosystem
#3 Name three biotic factors you might find in a pond. Answers will vary
#4 Name three abiotic factors you might find in a tundra Answers will vary
#5 How do nitrogen-fixing bacteria help plants? They convert nitrogen into a form that plants can absorb and use
Biomes
#1 Which biome has the most humus? Rainforest
#2 Which biome has the least fertile soil? Desert
#3 Which biome is home to many different species of grass? Grassland/ savannah
#4 Which biome has very cold winters but mild summers with small plants? Tundra
#5 What gas is responsible for global warming? Carbon dioxide
Food Chains
#1 What provides all the energy in a food chain? The sun
#2 What are herbivores? Organisms that consume only plants
#3 Why are there so many more producers than consumers? Everything relies on energy from producers
#4 In what level of a food pyramid is the most energy? Bottom level/ producers
#5 Why is so much energy lost between levels in a food pyramid? Some is lost as heat, some is used in life processes
Vocab
#1 What part of a plant absorbs water and minerals? Roots
#2 What job do decomposers do? Decompose dead organisms and recycle nutrients
#3 What type of energy drives the water cycle? Solar/ Sun
#4 What can green plants do that no other organisms can? Make their own food
#5 What is phototropism? Growth toward or away from light
Final Question
Construct a food chain or web with at least 5 organisms Answers will vary