7th Study Guide Ecology and Ecosystems

Question Answer
Ecology is best defined as the science of ______. the interactions of living things with each other and their environment.
This statement about aphotic zone in a body of water is FALSE. No organisms can live in this zone because of a lack of food.
Which organisms have a mutualistic relationship? Sea anemones and clownfish.
The total human population reached 7 billion people by the year___. 2014
Which organisms have the most similar niches? Moose and Deer
Matter that is recycled through ecosystems includes ____. Carbon, Nitrogen and Water
This is not an abiotic factor in the environment. Fossils
This organism is a parasite. Hookworm
At its current rate of growth, the human population will surpass 9 billion by the year _____. 2050
The primary producers in most aquatic biomes are _____. phytoplankton
The most important factors that determine the nature of aquatic biomes include ____, sunlight
A species' niche includes how the species _____. gets energy, obtains matter and interacts with other species.
A organism that captures food and consumes organisms in another species is a ____. predator
Factors that influence the rate of growth of a population include _______. births, deaths and migration.
This statement about Ecology is FALSE. It is defined as the study of natural resources.
T or F Only consumers need to get energy and matter from their environment. False
T or F Competition occurs only between members of different species. False
T or F A dead log in a forest could be considered and ecosystem. True
T or F Two species living in the same habitat at the same time must have the same niche. False
T or F Ecology is a major branch of life science. True
T or F All organisms need sunlight and matter from their environment. True
T or F The littoral zone of a lake is the deep water near the bottom. False
T or F Most keystone species are producers such as plants False
T or F Overall, the human population has had a pattern of exponential growth. True
T or F Major changes in human population growth rates first began in the 1700's. True
T or F Each ecosystem can have at most just one niche? False
Most ecosystems get energy from _______ sunlight
Any living or once-living aspect of the environment is called a (an) _________ factor. biotic
In a (an) ________ relationship, one species benefits while the other species is hurt. parasitism
_______ refers to the average weather in a place over a long period of time. Climate
The primary producers in terrestrial ecosystems are ____. plants
_________ is a relationship in which members of one species consume members of another species. Predation
Any aspect of the environment that has never been alive is called a (an) _____ factor. abiotic
Population ______ is the average number of individuals in a population for a given area. density
A close relationship between two species in which both species benefit is referred to as ________. mutualism
A population with a (an) _________ pattern of growth grows more slowly as it approaches the carrying capacity. logistic
The physical environment in which a species lives is called its ___. habitat
A close relationship between two species in which one species benefits but the other species is unaffected is called ______. commensalism
A population with a (an) _______ pattern of growth grows more quickly as it gets larger. exponential
The physical environment in which a species lives is called its ___. niche
What might happen if a new species moves into a habitat and has the same niche as the species that already lives in the habitat? The two species would compete for everything they need in the environment . One might replace the other or both might evolve different specializations to fill slightly different niches.
What are the three types of symbiosis? Mutualism, Parasitism and Commensalism.
Give an example of Mutualism. Clown Fish and Sea Anemone, Water Buffalo and birds on their backs.
Give an example of Parasitism. Flea and dog, hookworm and human, tape worms and hogs.
Give an example of Commensalism. Cattle and Cattle Egrets.
What are the 6 levels of organization in ecology, in order. Individual, Population, Community, Ecosystem, Biome and Biosphere.
Define Individual level of organization and an example. Single living thing. a deer, a plant or a fox
Define Population level of organization and an example. A group of the same species in an area. A group of Deer in the Flint Hills
Define Community level of organization and an example. All the populations in an area. Deer, foxes, rabbits, grass and snakes in the Flint HIlls.
Define Ecosystem level of organization and an example. All the populations plus the abiotic factors in an area. Deer, foxes, rabbits, grass, snakes, weather, rocks, and water in the area.
Define Biome level of organization. Group of similar ecosystems with the same general abiotic factors and primary producers.
Define Biosphere level of organization. All the parts of Earth where life can be found.

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