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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. When one organism is benefited by the association and the other is not affected
Intertidal Zone
Scavengers
Nature of Biomes
Commensalism
2. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Aphotic Zone
Food Chain
Hypotonic
Nitrogen Cycle 2
3. Composed of populations that are able to exist under the new conditions
Successive Communities
Physical Environment- Water
Population
Species
4. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Communities
Temperate Coniferous Plants
Rootlike holdfasts
Dentrified
5. Encompasses all that is external to the organism and is necessary for its existence
Carbon Cycle 3
Environment
Temperate Deciduous Forest Animals
Substratum (soil/rock)
6. One species may be competitively superior to the other and drive the second to extinction
Tertiary Consumers
Competition Same Niche
Saprophytes
Photic Zone
7. 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
Littoral Zone
Intraspecific Interactions
Grassland Biome
Commensalism
8. The chief disruptive force
Pyramid of Mass
Biotic Community
Competition
Nitrogen Cycle 4
9. Forest floors contain moss and lichens
Temperate Deciduous Forest Biome
Tundra Biome
Taiga Plants
Climate and weather
10. One species may be competitively superior in some regions - and the other may be superior in other regions under different environmental conditions. this would result in the elimination of one species in some places and the other in other places
Predator-Prey relationship
Competition Same Niche 2
Saprophytes
Pyramid of Numbers
11. Animals that consume dead animals
Biome
Commensalism
Scavengers
Climate and weather
12. Animals that eat both plants and animals
Temperate Deciduous Forest Plants
Abiotic (Physical) Environment
Heterotrophs
Omnivores
13. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Littoral Zone
Biome
Saprophytes
Littoral Zone Populations
14. Conserve water actively
Desert Plants
Carbon Cycle 3
Species
Grassland Biome
15. 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
Aphotic Zone
Food Chain
Niche
16. Rhododendrons and pines are more suited for growth in acid oil
Pyramid of Mass
Substratum-pH
Polar Region
Food Pyramids
17. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Temperate Deciduous Forest Biome
Rootlike holdfasts
Substratum-Minerals
Substratum-pH
18. Include saprophytic organisms and organisms of decay
Thundra Animals
Ecological Succession
Aphotic Zone
Decomposer
19. Freshwater Biomes vs. Saltwater 2: In rivers and streams - strong swift currents exist - and thus fish that have developed strong muscles and plants with _____________ have survived
Rootlike holdfasts
Mutualims
Aquatic Biomes
Littoral Zone
20. Determine by the amount of decaying plant and animal life in the soil
Pioneer Organism
Substratum-Humus
Desert Plants
Intertidal Zone
21. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Desert Plants
Thundra Animals
Dentrified
Nitrogen Cycle 3
22. Animals that consume primary consumers (carnivores)
Tundra Plants
Secondary Consumers
Epiphytes
Population
23. Includes climate - temperature - availability of light and water - and the local topology
Abiotic (Physical) Environment
Autotrophs
Communities
Desert Plants
24. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Mutualims
Nitrogen Cycle 4
Physical Environment-Temperature
25. Freshwater Biomes vs. Saltwater 1: Freshwater is _______________ which results in the passage of water into the cell. Freshwater organisms have homeostatic mechanisms to maintain water balance by the regular removal of the excess water. these include
Nitrified
Pyramid of Energy
Hypotonic
Commensalism
26. Integrated system of species that are dependent upon one another for survival
Polar Region
Substratum-pH
Pioneer Organism
Community
27. Region typical of the open seas and can be divided into photic and aphotic zones
Species
Physical Environment-Sunlight
Pelagic Zone
Commensalism
28. Include reproduction and protection from predators and destructive weather
Cohesive Force
Tertiary Consumers
Photic Zone animals
Desert animals
29. Animals that consume green plants (herbivores)
Primary Consumers
Hemeothermic (Warm Blooded)
Biosphere
Producers
30. Crawling and sessile organsms
Photic Zone animals
Benthos
Desert Biome
Saprophytes
31. Includes the community and the environment and usually all five kingdoms
Communities
Ecosystem
Biotic Environment
Polar Region
32. 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
Population
Physical Environment- Water
Second Law of Thermodynamics
Environment
33. Lichens and moss
Tundra Plants
Nitrogen Cycle 2
Tundra Biome
Littoral Zone Populations
34. Organisms that manufacture their own food
Osmoregulation
Desert animals
Secondary Consumers
Autotrophs
35. 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
Nitrogen Cycle 4
Tundra Plants
Carbon Cycle 3
Predators
36. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Aquatic Biomes
Nitrified
Climax Community
Abiotic (Physical) Environment
37. Recycle water - oxygen - and phosphorus
Tropical Rain Forest Animals
Scavengers
Lithosphere
Other Cycles
38. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Polar Region
Taiga Animals
Intraspecific Interactions
39. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Intraspecific Interactions
Predator-Prey relationship
Intertidal Zone
Substratum-texture
40. 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
Littoral Zone Populations
Climate and weather
Substratum-Humus
Nitrogen Cycle 4
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
Competition Same Niche 3
Benthos
Thundra Animals
Symbionts
42. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Photic Zone animals
Nekton
Marshes
Herbivores
43. The ultimate source of energy for all organisms
Temperate Deciduous Forest Plants
Physical Environment-Sunlight
Temperate Coniferous Forest Biome
Desert animals
44. Animals that consume only plants or plant foods
Epiphytes
Dominant Species
Herbivores
Tertiary Consumers
45. Determined by the same decisive factors-temperatures and rainfall
Biotic Environment
Benthos
Parasitism
Nature of Biomes
46. Any group of similar organisms that are capable of reproducing
Species
Organism
Successive Communities
Tundra Biome
47. The study of interactions between organisms and their environment
Commensalism
Biosphere
Producers
Ecology
48. Animals that feed on secondary consumer
Tertiary Consumers
Temperate Coniferous Plants
Rootlike holdfasts
Organism
49. The oceans
Substratum (soil/rock)
Intraspecific Interactions
Hydrosphere
Grassland Animals
50. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Secondary Consumers
Nekton
Temperate Coniferous Plants
Predator-Prey relationship