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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. Forest floors contain moss and lichens
Carnivores
Carbon Cycle 3
Taiga Plants
Material Cycles
2. Include reproduction and protection from predators and destructive weather
Cohesive Force
Dentrified
Osmoregulation
Competition Same Niche
3. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Secondary Consumers
Nitrified
Climax Community
Poikilothermic (Cold Blooded)
4. Composed of populations that are able to exist under the new conditions
Successive Communities
Taiga Biome
Food Pyramids
Physical Environment-Temperature
5. Vegetation such as vines and eppiphytes
Carbon Cycle 3
Nature of Biomes
Aphotic Zone
Tropical Rain Forest Plants
6. Deer - fox - woodchuck - and squirrel
Nature of Biomes
Aphotic Zone
Temperate Deciduous Forest Animals
Heterotrophs
7. The nitrogen locked up in the wastes and dead tissues is released by the action of the bacteria of decay - which convert the proteins into ammonia
Photic Zone animals
Rootlike holdfasts
Nitrogen Cycle 4
Competition Same Niche
8. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Freshwater Biomes
Poikilothermic (Cold Blooded)
Physical Environment- Water
Population
9. Lichens and moss
Nitrogen Cycle 5
Ecological Succession
Tundra Plants
Intertidal Zone
10. Polar bears - musk oxen - and arctic hens
Biome
Thundra Animals
Marshes
Second Law of Thermodynamics
11. Needs constant energy source and cycling of materials between the living system
Secondary Consumers
Parasitism
Nitrogen Cycle 5
Conditions for stability in an Ecosystem
12. The chief disruptive force
Physical Environment-Sunlight
Competition
Secondary Consumers
Ecosystem
13. Include those protists and fungi that decompose dead organic matter externally and absorb the nutrients - they consistitute a vital link in the cycling of material within the ecosystem
Saprophytes
Temperate Deciduous Forest Animals
Environment
Producers
14. 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
Aquatic Biomes
Carbon Cycle 3
Population
Pyramid of Energy
15. Integrated system of species that are dependent upon one another for survival
Community
Dentrified
Pelagic Zone
Freshwater Biomes
16. Determines water holding capacity
Nitrified
Nekton
Substratum-texture
Grassland Animals
17. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Competition
Temperate Deciduous Forest Plants
Nitrogen cycle 1
Biome
18. Includes climate - temperature - availability of light and water - and the local topology
Other Cycles
Material Cycles
Physical Environment- Water
Abiotic (Physical) Environment
19. Recycle water - oxygen - and phosphorus
Other Cycles
Biotic Environment
Population
Climate and weather
20. 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
Rootlike holdfasts
Desert animals
Climate and weather
Predators
21. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Grassland Biome
Poikilothermic (Cold Blooded)
Polar Region
Dominant Species
22. First to resettle a virgin area
Pioneer Organism
Niche
Dentrified
Temperate Deciduous Forest Plants
23. Community in an ecological succession is identified by a dominant species
Pyramid of Numbers
Sere
Physical Environment-Sunlight
Food Web
24. 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
Pyramid of Energy
Tropical Rain Forest Plants
Desert Biome
Autotrophs
25. The metabolically produced CO2 is released to the air. The rest of the orgnaic carbon remains locked whthin an organism until its death (except for wastes given off) - at which time decay processes by bacteria return the CO2 to the air
Polar Region
Carbon Cycle 3
Nitrogen cycle 1
Aphotic Zone
26. Consists of populations of different plants and animal species interacting with each other in a given environment
Secondary Consumers
Communities
Taiga Plants
Nitrogen
27. Animals that eat both plants and animals
Second Law of Thermodynamics
Omnivores
Coimax Vegetatioin
Saprophytes
28. Animals that consume green plants (herbivores)
Desert animals
Primary Consumers
Herbivores
Aphotic Zone
29. Used to include only the population and not their physical environment
Nitrified
Tropical Rain Forest Biome
Biotic Community
Coimax Vegetatioin
30. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Littoral Zone
Biome
Organism
Dominant Species
31. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Competition Same Niche 3
Environmental Factors
Heterotrophs
Ecosystem
32. Animals that consume only plants or plant foods
Herbivores
Sere
Temperate Deciduous Forest Plants
Scavengers
33. Symbiotic relationship from which both organisms derive some benefit
Mutualims
Thundra Animals
Ecosystem
Food Web
34. One that exerts control over the other species that are present
Autotrophs
Pelagic Zone
Dominant Species
Desert animals
35. When one organism is benefited by the association and the other is not affected
Secondary Consumers
Commensalism
Substratum (soil/rock)
Predator-Prey relationship
36. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Heterotrophs
Conditions for stability in an Ecosystem
Physical Environment- Water
Photic Zone
37. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Pyramid of Numbers
Physical Environment-Temperature
Pyramid of Mass
Aquatic Biomes
38. Links between oceans and land
Tropical Rain Forest Biome
Sere
Marshes
Tertiary Consumers
39. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Nitrified
Competition Same Niche
Producers
Substratum-pH
40. Determine by the amount of decaying plant and animal life in the soil
Mutualims
Dentrified
Substratum-Humus
Climax Community
41. Two species may rapidly evolve in divergent directions under the strong selection pressure resulting from intense competition. thus - the two species would rapidly evolve greater differences in their niches
Carnivores
Competition Same Niche 3
Deep-sea Organisms
Carbon Cycle 3
42. The vegetation that becomes dominant and stable after years of evolutiionary development
Symbionts
Coimax Vegetatioin
Physical Environment-Temperature
Food Web
43. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Tundra Biome
Competition Same Niche
Taiga Animals
Nitrogen Cycle 2
44. Cold - dry - and inhabited by fir - pine - and spruce trees -much vegetation has evolved adaptations for water conservation such as needle-shaped leaves -Extreme Northern Part of the US and in Southern Canada
Temperate Coniferous Forest Biome
Producers
Dentrified
Substratum-texture
45. Includes the community and the environment and usually all five kingdoms
Mutualims
Communities
Ecosystem
Aphotic Zone
46. 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
Intertidal Zone Population
Tundra Biome
Ecological Succession
Deep-sea Organisms
47. Group of organisms of the same species living together in a given location
Competition
Sere
Carnivores
Population
48. One or both organisms can't survive without the other
Species
Temperate Coniferous Plants
Obligatory
Decomposer
49. Any group of similar organisms that are capable of reproducing
Herbivores
Climax Community
Decomposer
Species
50. One species may be competitively superior to the other and drive the second to extinction
Competition Same Niche
Lithosphere
Tertiary Consumers
Abiotic (Physical) Environment