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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. Conserve water actively
Nitrogen Cycle 2
Desert Plants
Community
Substratum-texture
2. Encompasses all that is external to the organism and is necessary for its existence
Temperate Coniferous Plants
Environment
Temperate Deciduous Forest Biome
Photic zone
3. 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
Competition
Ecology
Carbon Cycle 3
Substratum (soil/rock)
4. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Poikilothermic (Cold Blooded)
Freshwater Biomes
Biosphere
Hypotonic
5. The study of interactions between organisms and their environment
Ecology
Desert Biome
Environmental Factors
Pyramid of Numbers
6. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Producers
Epiphytes
Poikilothermic (Cold Blooded)
Desert Plants
7. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Obligatory
Carbon Cycle 1
Climax Community
Pioneer Organism
8. The oceans
Hydrosphere
Substratum (soil/rock)
Cohesive Force
Conditions for stability in an Ecosystem
9. One or both organisms can't survive without the other
Substratum-Humus
Obligatory
Polar Region
Mutualims
10. 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
Substratum-Minerals
Tundra Plants
Autotrophs
11. Animals that consume primary consumers (carnivores)
Secondary Consumers
Aquatic Biomes
Climate and weather
Successive Communities
12. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Food Pyramids
Ecological Succession
Freshwater Biomes
Other Cycles
13. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Producers
Dominant Species
Desert animals
Nitrogen Cycle 5
14. 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
Temperate Coniferous Plants
Decomposer
Competition Same Niche 2
Aquatic Biomes
15. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Taiga Animals
Marine Biomes
Decomposer
Substratum (soil/rock)
16. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Desert Plants
Tropical Rain Forest Plants
Nature of Biomes
Tropical Rain Forest Animals
17. Polar bears - musk oxen - and arctic hens
Desert Biome
Temperate Deciduous Forest Plants
Thundra Animals
Substratum-Humus
18. Determines the nature of plant and animal life in the soil
Environment
Physical Environment- Water
Marine Biomes
Substratum (soil/rock)
19. Rock and soil surface
Hemeothermic (Warm Blooded)
Population
Lithosphere
Taiga Animals
20. Composed of populations that are able to exist under the new conditions
Abiotic (Physical) Environment
Aphotic Zone
Other Cycles
Successive Communities
21. Only animal life and other heterotrophic life exists
Herbivores
Aphotic Zone
Grassland Biome
Predator-Prey relationship
22. 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
Hydrosphere
Other Cycles
Niche
Thundra Animals
23. One that exerts control over the other species that are present
Temperate Deciduous Forest Plants
Dominant Species
Sere
Abiotic (Physical) Environment
24. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Osmoregulation
Predator-Prey relationship
Substratum-Minerals
Nitrogen Cycle 3
25. Affect the type of vegetation that can be supported
Substratum-Minerals
Sere
Substratum (soil/rock)
Hydrosphere
26. Links between oceans and land
Material Cycles
Marshes
Primary Consumers
Desert Plants
27. Rivers - lakes - ponds - and marshes
Freshwater Biomes
Deep-sea Organisms
Nitrogen Cycle 4
Carbon Cycle 2
28. Determines water holding capacity
Physical Environment-Sunlight
Physical Environment-Temperature
Substratum-texture
Polar Region
29. 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
Climate and weather
Grassland Biome
Herbivores
Pyramid of Energy
30. Animals that consume green plants (herbivores)
Rootlike holdfasts
Primary Consumers
Pyramid of Mass
Biosphere
31. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Intraspecific Interactions
Nekton
Heterotrophs
Intertidal Zone Population
32. Organisms that manufacture their own food
Autotrophs
Climate and weather
Abiotic (Physical) Environment
Nitrogen Cycle 5
33. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Intertidal Zone
Littoral Zone
Climax Community
Pyramid of Energy
34. Deer - fox - woodchuck - and squirrel
Temperate Deciduous Forest Animals
Competition Same Niche 3
Littoral Zone Populations
Parasitism
35. Community in an ecological succession is identified by a dominant species
Predator-Prey relationship
Sere
Poikilothermic (Cold Blooded)
Pioneer Organism
36. Animals that consume dead animals
Scavengers
Ecology
Intertidal Zone
Marshes
37. 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
Nitrified
Intraspecific Interactions
Hydrosphere
Pyramid of Mass
38. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Photic Zone animals
Benthos
Polar Region
Epiphytes
39. Consists of populations of different plants and animal species interacting with each other in a given environment
Pioneer Organism
Desert Biome
Communities
Food Pyramids
40. 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
Temperate Deciduous Forest Biome
Aquatic Biomes
Obligatory
Producers
41. Crawling and sessile organsms
Competition Same Niche
Desert animals
Benthos
Tropical Rain Forest Biome
42. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Heterotrophs
Nitrogen Cycle 2
Marine Biomes
Nitrified
43. Rhododendrons and pines are more suited for growth in acid oil
Competition Same Niche 3
Littoral Zone
Substratum-pH
Tundra Biome
44. Receive less rainfall than the temperate forests - have long - cold winters - and are inhabited by single coniferous tree-the spruce -extreme northern parts of Canada and Russia
Substratum-pH
Pelagic Zone
Taiga Biome
Biotic Environment
45. Vegetation such as vines and eppiphytes
Carnivores
Tropical Rain Forest Plants
Physical Environment-Temperature
Environmental Factors
46. Determine by the amount of decaying plant and animal life in the soil
Substratum-texture
Aphotic Zone
Benthos
Substratum-Humus
47. Food chain is not a simple linear chain but an intricate web
Food Web
Benthos
Rootlike holdfasts
Photic Zone animals
48. 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
Taiga Plants
Dominant Species
Saprophytes
Substratum (soil/rock)
49. 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
Environmental Factors
Lithosphere
Conditions for stability in an Ecosystem
50. Distinct community in a geographic region
Secondary Consumers
Biome
Nitrogen Cycle 3
Taiga Plants