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25 Cards in this Set
- Front
- Back
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What is primary succession?
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Surfaces on land where no siol exists.
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what is Microclimate
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The climate of a small area that differs from the climate around it.
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What is a wetland?
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an ecosystem in which water either covers the soil of is present at or near the surface of the soil.
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What is a Kelf forest?
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underwater forests of kelp
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what is population density?
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the number of individuals per unit area
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what is Immigration?
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the movment of individuals into an area
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what is emigration?
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the movment of individuals out of an area
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What is exponential growth?
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when individuals in a population reproduce at a constant rate
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What is nitrogen fixation?
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The process in which bacteria called legumes convert nitrogen gas into ammonia
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What is the process in which soil bacteria coverts nitrates into nitrogen gas?
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Denitrification
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what are boitic factors?
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The biological influences on organisms within an ecosystem.
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what are abiotic factors?
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Physical or nonliving factors that shape an ecosystem
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What is the fullrange of physical and biological conditions in which an organism lives?
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A niche
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What is parasitism?
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when an organism lives on or inside another organism and harms it.
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What is a carrying capacity?
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The largest number of individuals that a given environment can support.
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When does logistic growth occur?
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When a populations growth slows or stops following a period of exponential growth.
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What is monoculture?
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when large fields are planted with a single variety year after year.
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What is a renewable resource?
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a resource that can regenerate or can be replenished by biochemical cycles.
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What is an autotroph?
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Organisms that make their own food.
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In a cell what is the large structure that contains the cells genetic material?
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the nucleus
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_____ cells have genetic material that is not contained in a nucleus.
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Prokaryotic
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What do the vacuoles store?
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water, salts, proteins, and carbs.
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________ are organelles that capture the energy from sunlight and convert it into chemical energy in a process called photo synthesis.
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Chloroplasts
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What is diffusion of water through a selectively permeable membrane
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Osmosis
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what does Isotonic mean?
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same strength
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