| A | B |
|---|
| EXAMPLES OF BIOTIC FACTORS IN A PRAIRIE ECOSYSTEM | GRASS, PRAIRIE DOGS, BIRDS |
| THE PLACE WHERE AN ORGANISM LIVES AND PROVIDES ALL THE THINGS THE ORGANISM NEEDS TO SURVIVE | HABITAT |
| The smallest unit of ecological organization | ORGANISM |
| an example of a population | wolves in a forest |
| If you count 20 beetles in a garden measuring 5 square meters, the population density of the beetles is | 4 beetles per square meter |
| Counting the number of organisms in a small area and multiplying to estimate the number in a larger area is called | sampling |
| A group of antelope leaving the herd in search of better grassland is an example of | emigration |
| An approximation of a number, based on reasonable assumptions, is called a(n) | estimate |
| The largest population that an environment can support is called its | carrying capacity |
| An organism’s particular role in its habitat, or how it makes its living, is called its | niche |
| 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 |
| When a jellyfish paralyzes a tiny fish with its poisonous tentacles, the fish is the | prey |
| A close relationship between two species that benefits at least one of the species is called | symbiosis |
| The Escherichia coli that live in your intestine and help break down food are an example of which type of interaction? | mutualism |
| An early winter frost preventing further growth in a tomato garden is an example of | limiting factor |
| examples of limiting factors | food, space, weather conditions |
| An organism’s habitat must provide | food, water, shelter |
| The nonliving parts of an ecosystem are called | abiotic factors |
| To carry out photosynthesis, algae and plants use the abiotic factors sunlight, carbon dioxide, and | water |
| an interaction in which one organism kills and eats another | predation |
| an example of a predator adaptation | sharks powerful jaws |
| 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 |
| a flea is living on a dog, the dog is the | host |
| Mutualism, commensalism, and parasitism are the three types of | symbiotic relationships |
| Population density is defined as | he number of individuals of a population in a specific area. |
| A hawk building its nest on an arm of a saguaro cactus is an example of | commensalism |
| 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 |
