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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

Created by: wheels4

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