Upgrade to remove ads
Biology test review unit 2
Terms in this set (39)
Organisms that cannot make its own food and gets its nutrients and energy requiremengs by feeding on other organisms; also called a consumer
Model that shows many interconnected food chains and pathways in which energy and matter flow through the ecosystem
Number of different species living in a specific area
Simplified model that shows a single path for energy flow through an ecosystem
Biotic or abiotic factor that restricts the number, distribution, or reproduction of a population within a community
Organisms that make their own food; known as autotrophs. They get energy from chemicals or the sun
Role, or position of an organism in its environment
An organism that decomposes organic material
An organism, typically a bacterium, that derives energy from the oxidation of inorganic compounds
Total mass of living matter at each tropic level
Group of organisms of the same species that occupy the same geographic place at the same time
What animals eat producers?
What animals eat consumers?
Secondary consumers eat primary/carnivores
What animals eat both producers and consumers?
List several ways in which population can decrease in size?
Emigration, running out of food, new predator comes into the habitat
What is a limiting factor?
Biotic or abiotic factor that restricts the number, distribution, or reproduction of a population within a community. Ex:competition, parasitism, predation, and disease
Only 10% of energy stored in an organism is passed to the next trophic level. What happens to the rest of the energy?
Both species benefits from the relationship. Ex:butterflies and flowers
What is the greenhouse effect?
The trapping of heat by gases in the atmosphere
The preying of one animal on others. Ex:bear and fish
One species benefits and the other is neither harmed or helped. Ex:hermit crab and empty shell
One species benefits and the other is harmed. Ex:dog and tick
Whag happens as toxins move up the yrophic levels in food chains?
What results when a population grows larger than the carrying capacity of the environment?
More will die until population is back or lower than the environment can support
In what process dows carbon sye theough the biosphere?
Decomposition, photosynthesis, respiration
What is the original source kf energy in most ecosystems?
What are density-dependent and independent factors?
Density-independent:they do not depend on population size(ex:unusual weather, natural disasters)
Density-dependent:they depend on population size(ex:competition, predation)
Why is biodiversity important tl human society?
Boosts ecosystems productivity where each species all have important roles to play
What do scientists think about global warming?
Melting ice caps
Why do organisms need nutrients?
Replace worm out cells, stay healthy and strong, and to live
What is an energy pyramid?
Diagram that compares energy used by different trophies levels
What is a biomass pyramid?
Measure of the total dry mass of organisms in a given area
What is a phramid of numbers?
Shows the number of individual organism at each tropic level
What is nitrogen fixation and which organisms carry out thisnprocess?
Certain bacteria convert nitrogen gas into ammonia. Producers
What are the differences between primary and secondsry succession?
Primary occurs on bare rock surfaces where no soils exists
Secondary occurs when a disturbance changes a community without removing the soil
What causes a population to grow?
Reproducing, immigration. Birth rate becomes higher than death rate
How can several soecies of birds occupu yhe same habitat?
Occupy different niches in the same tree
Is energy recycled in an evosystem?
Is nutrients recycled?
Recommended textbook explanations
Modern Biology: Student Edition
Janet L. Hopson, Postlethwait
Johnson, Peter H. Raven
Biology Study Guide
Miller and Levine Biology
Joseph S. Levine, Kenneth R. Miller
You might also like...
Biology B - Unit 4 Review
Ecology Vocab Words
***Unit 3 ecology***
Other sets by this creator
ch 15 review
ch 14 test review
ch. 13 test review
ch.11 test review
Other Quizlet sets
Info Systems Final- Powerpoint
Trends chapter 6 classification of healthcare agen…
Sensation and Perception Chapter 5 Test Bank
Humanities 8 Civil War Test