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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. Deer - fox - woodchuck - and squirrel
Herbivores
Carnivores
Taiga Plants
Temperate Deciduous Forest Animals
2. First to resettle a virgin area
Food Pyramids
Biotic Community
Dentrified
Pioneer Organism
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
Nature of Biomes
Pyramid of Mass
Pioneer Organism
Food Chain
4. 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
Polar Region
Nitrogen Cycle 5
Saprophytes
Producers
5. Animals that only eat other animals -possess pointed teeth and fang-like canine teeth for tearing flesh -have shorter digestive tracts because the easier digestibility of animal food
Secondary Consumers
Pelagic Zone
Carnivores
Marshes
6. When a parasite benefits at the expense of the host
Parasitism
Substratum-Humus
Substratum-pH
Food Chain
7. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Competition Same Niche 2
Symbionts
Substratum-Minerals
Deep-sea Organisms
8. Only animal life and other heterotrophic life exists
Taiga Plants
Predators
Secondary Consumers
Aphotic Zone
9. Vegetation such as vines and eppiphytes
Conditions for stability in an Ecosystem
Competition Same Niche 2
Tropical Rain Forest Plants
Littoral Zone Populations
10. Animals that consume primary consumers (carnivores)
Secondary Consumers
Nitrogen Cycle 3
Desert animals
Autotrophs
11. Characterized by low rainfall - although considerably more than the desert biomes receive -provide no shelter for herbivorous mammals from carnivorous predators -ex: East of the Rockies - steppes of the Ukraine - and the pampas of Argentina
Grassland Biome
Abiotic (Physical) Environment
Temperate Deciduous Forest Animals
Freshwater Biomes
12. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Taiga Plants
Other Cycles
Taiga Animals
Photic zone
13. The chief disruptive force
Competition Same Niche 3
Nitrogen Cycle 4
Competition
Thundra Animals
14. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Food Chain
Temperate Deciduous Forest Biome
Intraspecific Interactions
Thundra Animals
15. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Biotic Community
Pyramid of Numbers
Thundra Animals
Physical Environment-Temperature
16. Composed of populations that are able to exist under the new conditions
Marine Biomes
Conditions for stability in an Ecosystem
Successive Communities
Second Law of Thermodynamics
17. Rock and soil surface
Nitrogen
Lithosphere
Photic Zone animals
Benthos
18. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Competition Same Niche 2
Grassland Animals
Taiga Biome
Littoral Zone
19. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Second Law of Thermodynamics
Intertidal Zone
Pioneer Organism
Herbivores
20. 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
Temperate Deciduous Forest Plants
Osmoregulation
Substratum-texture
Second Law of Thermodynamics
21. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Nitrified
Hypotonic
Pyramid of Energy
Food Pyramids
22. 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
Physical Environment-Temperature
Commensalism
Temperate Coniferous Forest Biome
23. Two fates await the ammonia (NH3). some are nitrified or dentrified
Nitrogen Cycle 4
Temperate Deciduous Forest Biome
Competition Same Niche 2
Nitrogen Cycle 5
24. The ultimate source of energy for all organisms
Nitrogen Cycle 5
Physical Environment-Sunlight
Symbionts
Carbon Cycle 3
25. 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
Coimax Vegetatioin
Biotic Community
Producers
Carbon Cycle 1
26. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Substratum-Humus
Marshes
Organism
Mutualims
27. Animals that consume only plants or plant foods
Organism
Herbivores
Temperate Deciduous Forest Animals
Pyramid of Energy
28. Rhododendrons and pines are more suited for growth in acid oil
Producers
Carnivores
Substratum-pH
Grassland Animals
29. Includes the community and the environment and usually all five kingdoms
Environment
Ecosystem
Desert Plants
Dominant Species
30. One that exerts control over the other species that are present
Dominant Species
Abiotic (Physical) Environment
Tropical Rain Forest Plants
Tropical Rain Forest Biome
31. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Nitrogen Cycle 5
Successive Communities
Carbon Cycle 1
Predator-Prey relationship
32. Lichens and moss
Heterotrophs
Tundra Plants
Nitrogen Cycle 5
Tundra Biome
33. One species may be competitively superior to the other and drive the second to extinction
Substratum-pH
Competition Same Niche
Species
Temperate Coniferous Plants
34. 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
Tropical Rain Forest Animals
Coimax Vegetatioin
Ecological Succession
Intraspecific Interactions
35. Forest floors contain moss and lichens
Taiga Plants
Grassland Animals
Nitrogen cycle 1
Dominant Species
36. Used to include only the population and not their physical environment
Benthos
Desert animals
Pyramid of Numbers
Biotic Community
37. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Hemeothermic (Warm Blooded)
Benthos
Temperate Deciduous Forest Plants
Photic Zone animals
38. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Intertidal Zone
Nekton
Saprophytes
Nitrogen
39. 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
Poikilothermic (Cold Blooded)
Aquatic Biomes
Climate and weather
Nitrogen Cycle 4
40. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Hydrosphere
Food Chain
Temperate Coniferous Forest Biome
Nitrogen
41. Affect the type of vegetation that can be supported
Marshes
Substratum-Minerals
Intraspecific Interactions
Obligatory
42. 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
Carbon Cycle 3
Nitrogen Cycle 2
Population
Aquatic Biomes
43. Region typical of the open seas and can be divided into photic and aphotic zones
Herbivores
Pelagic Zone
Aquatic Biomes
Competition Same Niche 3
44. 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
Desert Biome
Competition Same Niche 3
Heterotrophs
Thundra Animals
45. Adaptations for maintaining their internal osmolarity and conserving water
Conditions for stability in an Ecosystem
Tropical Rain Forest Plants
Osmoregulation
Aquatic Biomes
46. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Ecosystem
Pelagic Zone
Marine Biomes
Nitrogen Cycle 5
47. 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
Carbon Cycle 1
Biotic Community
Decomposer
48. Includes climate - temperature - availability of light and water - and the local topology
Carnivores
Dominant Species
Obligatory
Abiotic (Physical) Environment
49. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Dentrified
Photic zone
Food Pyramids
Taiga Plants
50. Regiong beneatht he photic zone that receives no light
Grassland Animals
Temperate Coniferous Forest Biome
Aphotic Zone
Coimax Vegetatioin