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7th Science

Populations and Communities Test

QuestionAnswer
An organism's habitat must provide all of the following EXCEPT - water, food, predators, or shelter. Predators
A close relationship between two species that benefits at least one of the species is called... Symbiosis
The struggle between organisms to survive in a habitat with limited resources is called... competition
To carry out photosynthesis, algae and plants use the abiotic factors sunlight, carbon dioxide, and... water
An approximation of a number, based on reasonable assumptions, is called an... estimate
The behaviors and physical characteristics of species that allow them to live successfully in their environment are called... adaptations
An early winter frost preventing further growth in a tomato garden is an example of... a limiting factor
If you count 20 beetles in a garden measuring 5 square meters, the population density of the beetles is... 4 beetles per square meter
The place where an organism lives and that provides the things the organism needs is called its... habitat
The study of how things interact with each other and with their environment is called... ecology
The nonliving parts of an ecosystem are called... abiotic factors
An organism's particular role in its habitat, or how it makes its living, is called its... niche
Population density is defined as... the number of individuals of a population in a specific area.
A group of antelope LEAVING (Exiting) the herd in search of better grassland is an example of... Emigration
When a flea is living on a dog, the dog is the... host
The smallest unit of ecological organization is a single... organism
When a jellyfish paralyzes a tiny fish with its poisonous tentacles, the fish is the... prey
All the different populations that live together in an area make up a... community
Which of the following is an example of a predator adaptation? a shark's powerful jaws
The first species to populate an area where primary succession is taking place are called... pioneer species
The Escherichia coli that live in your intestine and help break down food are an example of which type of interaction? mutualism
Counting that number of organisms in a small area and multiplying to estimate the number in a larger area is called... sampling
Which of the following is an example of a population - the gray wolves in a forest, the rocks in a rock collection the cats and dogs in your neighborhood, the bushes and grass in a park the gray wolves in a forest
Which of the following is a biotic factor in the prairie ecosystem - soil, sunlight, water, grass grass
A hawk building its nest on an arm of a saguaro cactus is an example of... commensalism
Bees and flowers are biotic factors in an ecosystem - true or false? True
All of the members of a community belong to the same species - true or false? False
Both species benefit in the type of symbiosis called mutualism - true or false? True
An insect looks like a leaf, so it blends in with its surroundings and is hard for predators to see. The insect's characteristic is an example of commensalism - true or false? False
A tapeworm living inside a wolf's body is a predator - true or false? False
The series of changes that occur in an area where no ecosystem previously existed is called primary succession - true or false? True
The population density decreases as the number of individuals in an area increases - true or false? False
Population size generally increases if the birth rate is greater than the death rate - true or false? True
In predation, the organism that kills another organism for food is the prey - true or false? False
The carrying capacity is the smallest number of individuals in a population that can live in one area - true or false? False
The largest population that an environment can support is called its... carrying capacity
Created by: 7thgrade
 

 



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