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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
Aquatic Biomes
Desert Plants
Littoral Zone Populations
Dentrified
2. Developed long legs and many are hoofed
Environmental Factors
Substratum (soil/rock)
Hydrosphere
Grassland Animals
3. Animals that eat both plants and animals
Commensalism
Littoral Zone
Omnivores
Material Cycles
4. Food chain is not a simple linear chain but an intricate web
Population
Other Cycles
Tropical Rain Forest Plants
Food Web
5. Two fates await the ammonia (NH3). some are nitrified or dentrified
Substratum-texture
Ecosystem
Nitrogen Cycle 5
Organism
6. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Climax Community
Autotrophs
Polar Region
Nature of Biomes
7. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Predator-Prey relationship
Physical Environment-Temperature
Freshwater Biomes
Obligatory
8. Nekton and benthos - scavengers - and predators (fiercely competitive)
Aphotic Zone animals
Other Cycles
Mutualims
Photic zone
9. Deer - fox - woodchuck - and squirrel
Saprophytes
Temperate Deciduous Forest Animals
Climax Community
Hypotonic
10. Symbiotic relationship from which both organisms derive some benefit
Substratum-texture
Hypotonic
Carbon Cycle 2
Mutualims
11. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Carnivores
Primary Consumers
Environment
Pyramid of Numbers
12. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Epiphytes
Littoral Zone
Aphotic Zone
Pyramid of Mass
13. Forest floors contain moss and lichens
Parasitism
Cohesive Force
Taiga Plants
Climax Community
14. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Abiotic (Physical) Environment
Ecological Succession
Carbon Cycle 2
Communities
15. 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
Nitrogen Cycle 3
Taiga Biome
Tropical Rain Forest Animals
16. Animals that consume green plants (herbivores)
Primary Consumers
Benthos
Nitrogen cycle 1
Poikilothermic (Cold Blooded)
17. Polar bears - musk oxen - and arctic hens
Climate and weather
Thundra Animals
Heterotrophs
Competition
18. The major component of the internal environment of all living things
Benthos
Physical Environment- Water
Competition Same Niche
Climate and weather
19. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Competition Same Niche 3
Producers
Nitrogen cycle 1
Aphotic Zone
20. 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
Thundra Animals
Carbon Cycle 2
Tertiary Consumers
Intraspecific Interactions
21. Affect the type of vegetation that can be supported
Ecosystem
Substratum-Minerals
Photic zone
Temperate Coniferous Forest Biome
22. Animals that consume dead animals
Substratum-Minerals
Dentrified
Competition
Scavengers
23. Animals that consume primary consumers (carnivores)
Secondary Consumers
Herbivores
Tertiary Consumers
Abiotic (Physical) Environment
24. Consists of populations of different plants and animal species interacting with each other in a given environment
Parasitism
Communities
Competition Same Niche
Primary Consumers
25. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Substratum-texture
Carnivores
Biosphere
Community
26. 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
Marine Biomes
Secondary Consumers
Substratum-texture
27. The oceans
Conditions for stability in an Ecosystem
Hydrosphere
Biosphere
Temperate Deciduous Forest Plants
28. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Dominant Species
Environment
Ecological Succession
Food Chain
29. 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
Polar Region
Grassland Biome
Deep-sea Organisms
Substratum-Humus
30. Regiong beneatht he photic zone that receives no light
Taiga Animals
Abiotic (Physical) Environment
Hypotonic
Aphotic Zone
31. Animals that consume only plants or plant foods
Herbivores
Desert Plants
Food Chain
Parasitism
32. 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
Aphotic Zone
Nitrogen Cycle 2
Physical Environment- Water
Saprophytes
33. The chief disruptive force
Competition
Mutualims
Pyramid of Energy
Benthos
34. Algae - crabs - crustacea - and many different species of fish
Second Law of Thermodynamics
Tundra Biome
Littoral Zone Populations
Symbionts
35. Any group of similar organisms that are capable of reproducing
Photic zone
Second Law of Thermodynamics
Cohesive Force
Species
36. One species may be competitively superior to the other and drive the second to extinction
Ecosystem
Competition Same Niche
Food Chain
Commensalism
37. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Dominant Species
Pyramid of Numbers
Hemeothermic (Warm Blooded)
Environmental Factors
38. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Pyramid of Numbers
Sere
Desert animals
Marshes
39. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Biosphere
Biotic Environment
Intertidal Zone
Ecosystem
40. When one organism is benefited by the association and the other is not affected
Nitrogen Cycle 5
Commensalism
Biotic Community
Hydrosphere
41. Vegetation such as vines and eppiphytes
Carnivores
Temperate Deciduous Forest Plants
Tropical Rain Forest Plants
Material Cycles
42. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Material Cycles
Hemeothermic (Warm Blooded)
Scavengers
Deep-sea Organisms
43. Distinct community in a geographic region
Competition Same Niche 2
Biome
Aquatic Biomes
Population
44. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Secondary Consumers
Hemeothermic (Warm Blooded)
Autotrophs
Nitrogen
45. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Marshes
Omnivores
Hydrosphere
Taiga Animals
46. Determines water holding capacity
Substratum-Minerals
Desert animals
Saprophytes
Substratum-texture
47. Community in an ecological succession is identified by a dominant species
Biome
Sere
Ecosystem
Decomposer
48. 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
Decomposer
Taiga Biome
Nekton
Pyramid of Energy
49. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Biotic Community
Saprophytes
Nekton
Species
50. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Poikilothermic (Cold Blooded)
Deep-sea Organisms
Tundra Plants
Intraspecific Interactions