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PCAT Biology Ecology
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Subjects
:
pcat
,
biology
Instructions:
Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Organism
Littoral Zone Populations
Tropical Rain Forest Plants
Carnivores
2. Crawling and sessile organsms
Niche
Benthos
Tundra Plants
Epiphytes
3. Animals that eat both plants and animals
Taiga Plants
Omnivores
Primary Consumers
Photic zone
4. Defines the functional role of an organism in its ecosystem -described what the organism eats - where and how it obtains its food - what climatic factors it can tolerate and which are optimal - the nature of its parasites and predators - where and ho
Nekton
Photic Zone animals
Niche
Tertiary Consumers
5. Treeless - frozen plain found between the taiga lands and the northern ice sheets - very short summer and thus a very short growing season during which time the ground becomes wet and marshy
Tundra Biome
Producers
Nitrogen Cycle 4
Carbon Cycle 2
6. One that exerts control over the other species that are present
Dominant Species
Poikilothermic (Cold Blooded)
Littoral Zone
Competition
7. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Hemeothermic (Warm Blooded)
Photic Zone animals
Aphotic Zone
Ecological Succession
8. Rivers - lakes - ponds - and marshes
Tertiary Consumers
Freshwater Biomes
Food Chain
Population
9. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Poikilothermic (Cold Blooded)
Temperate Deciduous Forest Biome
Population
Dentrified
10. Symbiotic relationship from which both organisms derive some benefit
Marshes
Mutualims
Hydrosphere
Nitrogen Cycle 4
11. The major component of the internal environment of all living things
Competition Same Niche 3
Physical Environment- Water
Nitrogen Cycle 4
Second Law of Thermodynamics
12. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Environmental Factors
Lithosphere
Nitrogen
Symbionts
13. Determine by the amount of decaying plant and animal life in the soil
Niche
Hemeothermic (Warm Blooded)
Nekton
Substratum-Humus
14. Any group of similar organisms that are capable of reproducing
Taiga Biome
Pyramid of Numbers
Thundra Animals
Species
15. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Biotic Community
Predator-Prey relationship
Aphotic Zone
Pyramid of Mass
16. When one organism is benefited by the association and the other is not affected
Ecology
Commensalism
Desert Biome
Physical Environment-Sunlight
17. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Temperate Deciduous Forest Biome
Substratum-texture
Pyramid of Numbers
Tropical Rain Forest Animals
18. First to resettle a virgin area
Desert animals
Hydrosphere
Parasitism
Pioneer Organism
19. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Biosphere
Autotrophs
Competition
Ecological Succession
20. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Food Chain
Marshes
Pyramid of Energy
Primary Consumers
21. Includes the community and the environment and usually all five kingdoms
Ecosystem
Biosphere
Parasitism
Nitrogen cycle 1
22. The vegetation that becomes dominant and stable after years of evolutiionary development
Coimax Vegetatioin
Carbon Cycle 3
Climate and weather
Herbivores
23. Links between oceans and land
Marshes
Commensalism
Tertiary Consumers
Carbon Cycle 2
24. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Tundra Plants
Sere
Temperate Coniferous Plants
Primary Consumers
25. Integrated system of species that are dependent upon one another for survival
Ecosystem
Nitrogen
Commensalism
Community
26. The oceans
Littoral Zone
Tundra Biome
Marshes
Hydrosphere
27. Gaseous CO2 enters the living world when plants use it to produce glucose via photosynthesis. The carbon atoms in CO2 are bonded to hydrogen and other carbon atoms. the plant uses the glucose to make starch - proteins - and fat
Autotrophs
Nitrogen cycle 1
Photic Zone animals
Carbon Cycle 1
28. Needs constant energy source and cycling of materials between the living system
Conditions for stability in an Ecosystem
Intertidal Zone Population
Taiga Animals
Organism
29. Adaptations for maintaining their internal osmolarity and conserving water
Food Web
Marine Biomes
Osmoregulation
Biotic Community
30. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Dentrified
Nekton
Herbivores
Benthos
31. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Epiphytes
Food Chain
Osmoregulation
Desert animals
32. Forest floors contain moss and lichens
Symbionts
Dominant Species
Environment
Taiga Plants
33. Animals that consume green plants (herbivores)
Heterotrophs
Dominant Species
Freshwater Biomes
Primary Consumers
34. Without a constant input of energy from the sun - an ecosystem would soon run down - as food is transferred from one level of the food chain to the next - a transfer of energy occurs
Food Pyramids
Intraspecific Interactions
Nitrogen cycle 1
Pioneer Organism
35. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Temperate Deciduous Forest Plants
Tropical Rain Forest Plants
Photic Zone animals
Physical Environment- Water
36. Nekton and benthos - scavengers - and predators (fiercely competitive)
Symbionts
Obligatory
Aphotic Zone animals
Commensalism
37. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Physical Environment-Sunlight
Tropical Rain Forest Biome
Intertidal Zone
Photic Zone
38. Distinct community in a geographic region
Biome
Hemeothermic (Warm Blooded)
Pyramid of Mass
Symbionts
39. Organisms that manufacture their own food
Aphotic Zone animals
Desert animals
Autotrophs
Second Law of Thermodynamics
40. Rock and soil surface
Competition Same Niche 2
Lithosphere
Aphotic Zone
Decomposer
41. Each member of a food chain uses some of the energy it obtains from its food for its own metabolism and loses some additional energy in the form of heat
Biome
Biosphere
Environmental Factors
Pyramid of Energy
42. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Hemeothermic (Warm Blooded)
Organism
Dentrified
Marine Biomes
43. Free-living organisms that feed on other living organisms
Nature of Biomes
Biosphere
Predators
Osmoregulation
44. Food chain is not a simple linear chain but an intricate web
Substratum-texture
Environmental Factors
Food Chain
Food Web
45. Encompasses all that is external to the organism and is necessary for its existence
Environment
Nitrogen Cycle 5
Lithosphere
Nitrogen Cycle 2
46. Community in an ecological succession is identified by a dominant species
Substratum-pH
Freshwater Biomes
Sere
Commensalism
47. Animals that feed on secondary consumer
Photic Zone
Mutualims
Tertiary Consumers
Pelagic Zone
48. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Epiphytes
Hypotonic
Commensalism
Material Cycles
49. Because organisms at the upper levels of the food chain derive their food energy from organisms at lower levels - and because energy is lost from one level to the next - each level can support a successively smaller biomass
Food Web
Herbivores
Pyramid of Mass
Poikilothermic (Cold Blooded)
50. Every energy transfer involves a loss of energy and each level of the food chain uses some of the energy it obtains from the food for its own metabolism and loses some additional energy in the form of heat
Second Law of Thermodynamics
Deep-sea Organisms
Saprophytes
Taiga Biome
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