Populations and Communities
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| An organism’s habitat must provide all of the following | food, water, shelter
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| The nonliving parts of an ecosystem are called | abiotic factors
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| To produce their own food, algae and plants use the abiotic factors sunlight carbon dioxide, and _____ | water
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| A population is all the members of one species living in a particular | area
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| A group of antelope leaving the herd in search of better grassland is an axample of | emigration
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| If you count 20 beetles in a garden measuring 5 square meters, the population density of the beetles is | 4 beetles per square meter
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| An organism’s particular role in its habitat, or when and how it survives, is called its | niche
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| All of the following are examples of limiting factors | food, space, weather conditions
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| An example of a predator adaptation | a shark’s powerful jaws
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| A hawk building its next on an arm of saguaro cactus is an example of | commensalism
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| The place where an organism lives and that provides the things the organism needs is called its | habitat
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| A biotic factor in the prairie ecosystem? | grass
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| The behaviors and physical characteristics of species that allow them to live successfully in their environment are called | adaptations
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| The struggle between organisms to survive in a habitat with limited resources is called | competition
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| The series of changes that occurs after a disturbance in an existing ecosystem is called | secondary succession
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| The first species to populate an area where primary succession is taking place are called | pioneer species
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| Population density is defined as | the number of individuals of a population in a specific area
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| The largest population that an environment can support is called its | carrying capacity
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| An early winter frost preventing further growth in a tomato garden is an example of | a limiting factor
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| The smallest unit of ecological organization is a single | organism
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| The gray wolves in a forest | a population
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| All the different populations that live together in an area make up a(n) | community
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| The study of how things interact with each other and with their environment is called | ecology
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| When a flea is living on a dog, the dog is the | host
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| Mutualism, commensalism, and parasitism are the three types of | ???symbiotic relationships
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| An insect looks like a leaf, so it blends in with its surroundings and is hard for predators to see. The insect’s characteristics is an example of | adaptations
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| Both species benefit in the type of symbiosis called | mutualism
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| The series of changes that occur in an area where no ecosystem previously existed is called | primary succession
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| Population size generally increases if the birth rate is greater than the | death rate
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| Bees and flowers are _____ factors in an ecosystem | biotic
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| The part of an ecosystem where an organism lives and feeds is called the organism’s______ | havitat
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| Nutrients in the soil from decaying remains of animals is a(N) _____factor of an organism’s | biotic
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| All the biotic and abiotic factors in an area together make up a(n) ______ | ecosystem
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| The main way that populations increase in size is through the _____ of offspring | birth
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| A lack of places to build nests is an example of ______ as a limiting factor for a population of birds | space
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| The thick fur of a polar bear is a(n) _______ that allows the bear to live successfully inb its environment. | adaptations
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| Water, sunlight, and soil are _____ in an ecosystem | abiotic factors
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| The type of succession that occurs in an area where an ecosystem has been disturbed, but where soil and organisms still exist, is called ____ succession | secondary
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| Emigration | A group of zebras breaking off from a herd decreases the size of the herd population through
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| If food is scarce, it becomes a(n) ____ that prevents population growth | limiting factor
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| Prairie dogs, snakes, and grass make up a level of ecological organization called a(n)______ | community
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| The study of how living things interact with each other and with their environment is called _____ | ecology
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| A hawk building a nest on the arm of a cactus without hurting the cactus is an example of the symbiotic relationship called | commensalism
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| Ticks feed on the blood of mice in a symbiotic relationship called | parasitism
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