population
Group of individual organisms of the same species living in a particular area.
Subject:
Chapter 4 - Ecosystems: Components, Energy Flow, and Matter Cycling
plants (plantae)
Eukaryotic, mostly multicellular organisms such as algae (red, blue, and green), mosses, ferns, flowers, cacti, grasses, beans, wheat, rice, and trees. These organisms use photosynthesis to produce organic nutrients for themselves and for other organisms feeding on them. Water and other inorganic nutrients are obtained from the soil for terrestrial plants and from the water for aquatic plants.
Subject:
plankton
Small plant organisms (phytoplankton) and animal organisms (zooplankton) that float in aquatic ecosystems.
Subject:
phytoplankton
Small, drifting plants, mostly algae and bacteria, found in aquatic ecosystems. Compare plankton, zooplankton.
Subject:
photosynthesis
Complex process that takes place in cells of green plants. Radiant energy from the sun is used to combine carbon dioxide (CO2) and water (H2O) to produce oxygen (O2) and carbohydrates (such as glucose, C6H12O6) and other nutrient molecules. Compare aerobic respiration, chemosynthesis.
Subject:
phosphorus cycle
Cyclic movement of phosphorus in different chemical forms from the environment to organisms and then back to the environment.
Subject:
percolation
Passage of a liquid through the spaces of a porous material such as soil.
Subject:
organism
Any form of life.
Subject:
omnivore
Animal that can use both plants and other animals as food sources. Examples are pigs, rats, cockroaches, and people. Compare carnivore, herbivore.
Subject:
nutrient cycle
See biogeochemical cycle.
Subject:
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