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chapter 3 study guid

QuestionAnswer
list the levels of organization in order from largest to smallest biosphere, biome, ecosystem, community, population, and individual.
what methods do ecologists use? they're are three. observing, experimenting, and modeling.
what type of organism would be at the beginning of the food chain? producers
what organism uses energy to make its own food? plants,producers
what is the total amount of living tissue within a given tropic level? biomass
what animals eat both producers and consumers? omnivores
a snake that has eaten an insect that fed on a plant is a .....? consumer
what are the 3 types of pyramids and define? energy-shows about how much energy is avaible at each level. biomass-amount of living matter at each level pyramid of numbers-number of individual organisms at each level
what is the process by which bacteria convert nitrogen gas in the air to ammoina? nitrogen fixation
the movements of energy and nutrients through living systems are different because? matter is recycled within and between ecosystems
the branch of biology dealing with interactions among and between their organisms and their envitonment is called? ecology
what are the combined portions of Earth called in which all livings things exist biosphere
all the members of a particular species that live in the same area are called population
green plants are what? producers
what is the original source of almost all the energy in most ecosystems? the sun
an organism that can not make its own food? heterothophs
organisms that obtain nutriensa by breaking down dead plants decomposes
feeds only plaNTS? herbivors
feeding relationships in an ecosystem make up s food food web
repeated movement of water between earth's surface and the atmosphere is called? water cycle
organisms need nutrients in order to? survive
Created by: glovereg
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