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science ch8
Populations and Communities
| Question | Answer |
|---|---|
| An organism’s habitat must provide all of the following | food, water, shelter |
| The nonliving parts of an ecosystem are called | abiotic factors |
| To produce their own food, algae and plants use the abiotic factors sunlight carbon dioxide, and _____ | water |
| A population is all the members of one species living in a particular | area |
| A group of antelope leaving the herd in search of better grassland is an axample of | emigration |
| If you count 20 beetles in a garden measuring 5 square meters, the population density of the beetles is | 4 beetles per square meter |
| An organism’s particular role in its habitat, or when and how it survives, is called its | niche |
| All of the following are examples of limiting factors | food, space, weather conditions |
| An example of a predator adaptation | a shark’s powerful jaws |
| A hawk building its next on an arm of saguaro cactus is an example of | commensalism |
| The place where an organism lives and that provides the things the organism needs is called its | habitat |
| A biotic factor in the prairie ecosystem? | grass |
| The behaviors and physical characteristics of species that allow them to live successfully in their environment are called | adaptations |
| The struggle between organisms to survive in a habitat with limited resources is called | competition |
| The series of changes that occurs after a disturbance in an existing ecosystem is called | secondary succession |
| The first species to populate an area where primary succession is taking place are called | pioneer species |
| Population density is defined as | the number of individuals of a population in a specific area |
| The largest population that an environment can support is called its | carrying capacity |
| An early winter frost preventing further growth in a tomato garden is an example of | a limiting factor |
| The smallest unit of ecological organization is a single | organism |
| The gray wolves in a forest | a population |
| All the different populations that live together in an area make up a(n) | community |
| The study of how things interact with each other and with their environment is called | ecology |
| When a flea is living on a dog, the dog is the | host |
| Mutualism, commensalism, and parasitism are the three types of | ???symbiotic relationships |
| 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 |
| Both species benefit in the type of symbiosis called | mutualism |
| The series of changes that occur in an area where no ecosystem previously existed is called | primary succession |
| Population size generally increases if the birth rate is greater than the | death rate |
| Bees and flowers are _____ factors in an ecosystem | biotic |
| The part of an ecosystem where an organism lives and feeds is called the organism’s______ | havitat |
| Nutrients in the soil from decaying remains of animals is a(N) _____factor of an organism’s | biotic |
| All the biotic and abiotic factors in an area together make up a(n) ______ | ecosystem |
| The main way that populations increase in size is through the _____ of offspring | birth |
| A lack of places to build nests is an example of ______ as a limiting factor for a population of birds | space |
| The thick fur of a polar bear is a(n) _______ that allows the bear to live successfully inb its environment. | adaptations |
| Water, sunlight, and soil are _____ in an ecosystem | abiotic factors |
| 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 |
| Emigration | A group of zebras breaking off from a herd decreases the size of the herd population through |
| If food is scarce, it becomes a(n) ____ that prevents population growth | limiting factor |
| Prairie dogs, snakes, and grass make up a level of ecological organization called a(n)______ | community |
| The study of how living things interact with each other and with their environment is called _____ | ecology |
| A hawk building a nest on the arm of a cactus without hurting the cactus is an example of the symbiotic relationship called | commensalism |
| Ticks feed on the blood of mice in a symbiotic relationship called | parasitism |
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wheels4