Energy Flow
Nutrient Cycling
Populations
Human Impacts
Misc.
100
Organisms (such as algae or plants) at the bottom of the food chain that make their own food
What are producers?
100
The repeated movement of water between Earth's surface and atmosphere
What is the water cycle?
100
The largest number of organisms an environment can support
What is the carrying capacity?
100
A modern branch of biology that seeks to protect biodiversity
What is conservation biology?
100
The branch of biology dealing with interactions among organisms and between organisms and their environment
What is ecology?
200
An animal that eats both producers and consumers
What is an omnivore?
200
The process in which plants take in CO2 and water to make carbohydrates and release oxygen
What is photosynthesis?
200
The number of individuals of a population per unit area
What is population density?
200
A group of organisms near extinction
What is an endangered species?
200
A relationship between organisms in which both organisms benefit.
What is mutualism?
300
Organisms that obtain nutrients by breaking down dead and decaying plants and animals
What are decomposers?
300
Water loss from the leaves of plants
What is transpiration?
300
A growth pattern in which populations reproduce at a constant rate
What is exponential growth?
300
A method farmers use to reduce soil erosion that involves plowing fields across the slope of the land
What is contour plowing?
300
A relationship between organisms in which one organisms benefits and the other is neither helped nor harmed. DAILY DOUBLE!!!
What is commensalism?
400
The process in which bacteria at the bottom of the ocean makes their own food without sunlight
What is chemosynthesis?
400
An organism dies and decays, releasing CO2 back into the ground
What is decomposition?
400
The area inhabited by a population
What is geographic range?
400
When sulfur and nitrogen compounds combine with water in the atmosphere and fall to the Earth
What is acid rain?
400
A relationship between organisms in which one organism benefits and the other organism is harmed.
What is parasitism?
500
A pyramid that shows the amount of living tissue at each trophic level in an ecosystem
What is a biomass pyramid?
500
The process by which bacteria convert nitrogen gas in the air to ammonia
What is nitrogen fixation?
500
A limiting factor dependent on the population size
What is a density-dependent limiting factor?
500
Clearing of forests for agriculture and lumber without replanting trees
What is deforestation?
500
The combined portions of Earth in which all living things exist
What is the biosphere?
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