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Test your basic knowledge |
PCAT Biology Ecology
Start Test
Study First
Subjects
:
pcat
,
biology
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
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. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Obligatory
Substratum-texture
Temperate Deciduous Forest Biome
Substratum (soil/rock)
2. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Nekton
Environmental Factors
Obligatory
Primary Consumers
3. 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
Temperate Coniferous Forest Biome
Taiga Biome
Pyramid of Mass
Organism
4. Community in an ecological succession is identified by a dominant species
Sere
Scavengers
Physical Environment-Temperature
Saprophytes
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
Autotrophs
Tundra Biome
Temperate Deciduous Forest Biome
Freshwater Biomes
6. Needs constant energy source and cycling of materials between the living system
Competition
Nitrogen Cycle 5
Benthos
Conditions for stability in an Ecosystem
7. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Other Cycles
Secondary Consumers
Temperate Deciduous Forest Plants
Photic Zone
8. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Nature of Biomes
Food Web
Food Chain
Carbon Cycle 2
9. One that exerts control over the other species that are present
Dominant Species
Desert Plants
Aphotic Zone animals
Tertiary Consumers
10. Conserve water actively
Poikilothermic (Cold Blooded)
Thundra Animals
Desert Plants
Species
11. Determines water holding capacity
Niche
Substratum-texture
Environmental Factors
Intertidal Zone Population
12. Food chain is not a simple linear chain but an intricate web
Food Web
Primary Consumers
Biome
Abiotic (Physical) Environment
13. Distinct community in a geographic region
Coimax Vegetatioin
Biome
Photic Zone
Nitrogen Cycle 2
14. Organisms that manufacture their own food
Autotrophs
Tundra Plants
Taiga Biome
Food Web
15. Determines the nature of plant and animal life in the soil
Temperate Coniferous Forest Biome
Biotic Community
Herbivores
Substratum (soil/rock)
16. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Nitrogen Cycle 2
Hypotonic
Deep-sea Organisms
Photic Zone
17. Links between oceans and land
Marshes
Taiga Biome
Competition Same Niche 3
Primary Consumers
18. Region typical of the open seas and can be divided into photic and aphotic zones
Competition Same Niche 3
Pelagic Zone
Pioneer Organism
Pyramid of Mass
19. Algae - crabs - crustacea - and many different species of fish
Littoral Zone Populations
Coimax Vegetatioin
Pyramid of Numbers
Intertidal Zone Population
20. Group of organisms of the same species living together in a given location
Community
Biome
Population
Poikilothermic (Cold Blooded)
21. Animals that consume primary consumers (carnivores)
Intertidal Zone
Secondary Consumers
Benthos
Commensalism
22. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Parasitism
Intertidal Zone
Polar Region
Temperate Deciduous Forest Animals
23. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Secondary Consumers
Hypotonic
Nitrogen Cycle 4
24. 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
Niche
Pioneer Organism
Littoral Zone Populations
Pyramid of Energy
25. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Climax Community
Second Law of Thermodynamics
Conditions for stability in an Ecosystem
Tundra Plants
26. Composed of populations that are able to exist under the new conditions
Pelagic Zone
Coimax Vegetatioin
Successive Communities
Pyramid of Mass
27. Individuals belonging to the same species use the same resources and if a particular resource is limited - then these organisms must compete with one another
Community
Physical Environment-Sunlight
Environment
Intraspecific Interactions
28. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Nitrogen
Pyramid of Numbers
Aquatic Biomes
Substratum-Humus
29. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Intraspecific Interactions
Deep-sea Organisms
Hydrosphere
Nitrified
30. Consists of populations of different plants and animal species interacting with each other in a given environment
Communities
Successive Communities
Marshes
Taiga Animals
31. The chief disruptive force
Competition
Littoral Zone
Deep-sea Organisms
Primary Consumers
32. Sunlit layer of the open sea extending to a depth of 250-600ft
Tertiary Consumers
Physical Environment-Sunlight
Photic zone
Littoral Zone Populations
33. Freshwater Biomes vs. Saltwater 3: Freshwater biomes - except very large lakes - are affected by variations in _________. temperature of freshwater bodies varies considerably; they may freeze or dry up - and mud from their floors may be stirred up by
Climate and weather
Ecosystem
Commensalism
Carbon Cycle 2
34. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Substratum-Humus
Physical Environment-Temperature
Taiga Animals
Substratum (soil/rock)
35. Includes the community and the environment and usually all five kingdoms
Autotrophs
Tropical Rain Forest Animals
Ecosystem
Competition Same Niche 2
36. Include saprophytic organisms and organisms of decay
Nitrogen Cycle 3
Nature of Biomes
Decomposer
Temperate Coniferous Plants
37. Rivers - lakes - ponds - and marshes
Material Cycles
Carbon Cycle 2
Pyramid of Numbers
Freshwater Biomes
38. When one organism is benefited by the association and the other is not affected
Successive Communities
Dominant Species
Sere
Commensalism
39. 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
Taiga Plants
Ecology
Mutualims
Second Law of Thermodynamics
40. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Physical Environment-Temperature
Poikilothermic (Cold Blooded)
Deep-sea Organisms
Temperate Deciduous Forest Animals
41. More than 70% of earth -plants have little controlling influence in communities -most stable ecosystems; the conditions affecting temperature - amount of available oxygen and cabon dioxide - and amount of suspended or dissolve materials are very stab
Hemeothermic (Warm Blooded)
Saprophytes
Aquatic Biomes
Niche
42. The vegetation that becomes dominant and stable after years of evolutiionary development
Coimax Vegetatioin
Producers
Benthos
Taiga Plants
43. The major component of the internal environment of all living things
Heterotrophs
Physical Environment- Water
Nitrogen Cycle 2
Freshwater Biomes
44. Recycle water - oxygen - and phosphorus
Littoral Zone
Deep-sea Organisms
Other Cycles
Grassland Biome
45. One or both organisms can't survive without the other
Obligatory
Poikilothermic (Cold Blooded)
Taiga Plants
Intertidal Zone Population
46. Symbiotic relationship from which both organisms derive some benefit
Aphotic Zone animals
Taiga Biome
Nekton
Mutualims
47. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Polar Region
Producers
Nitrogen cycle 1
Physical Environment-Temperature
48. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Competition Same Niche
Dominant Species
Polar Region
Cohesive Force
49. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Dominant Species
Biome
Material Cycles
Communities
50. Receive less than ten inches of rain each year; the rain is concentrated within a few heavy cloudbursts -ex: Sahara in Africa and Gobi in Asia
Desert Biome
Physical Environment-Temperature
Littoral Zone
Intraspecific Interactions