population - a group of organisms of the same species, photosynthesis - process in which green plants use sunlight to make their own food, carnivore - organism that eats other animals, compete - a relationship between organisms that depend on the same resources in the same place, predator - an animal that lives mostly by hunting and eating other animals, consumer-producer relationship - when an animal depends on a plant for energy, flow of energy - arrows in a food chain or web, energy pyramid - diagram demonstrating the levels of energy in an ecosystem, chloroplast - organelle where photosynthesis occurs, vacuole - organelle that stores water , consume - to eat , nutrient - source of food or energy,

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