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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. Encompasses all that is external to the organism and is necessary for its existence
Competition Same Niche 3
Temperate Coniferous Plants
Polar Region
Environment
2. Group of organisms of the same species living together in a given location
Food Chain
Population
Intertidal Zone Population
Commensalism
3. Animals that consume green plants (herbivores)
Material Cycles
Hydrosphere
Substratum-Minerals
Primary Consumers
4. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Desert Plants
Rootlike holdfasts
Tropical Rain Forest Biome
Decomposer
5. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Pyramid of Numbers
Symbionts
Obligatory
Ecological Succession
6. Determine by the amount of decaying plant and animal life in the soil
Biotic Environment
Nitrogen Cycle 4
Food Chain
Substratum-Humus
7. The vegetation that becomes dominant and stable after years of evolutiionary development
Tertiary Consumers
Aquatic Biomes
Coimax Vegetatioin
Climax Community
8. Free-living organisms that feed on other living organisms
Carbon Cycle 2
Biosphere
Predators
Marshes
9. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Competition Same Niche 2
Organism
Carbon Cycle 3
Heterotrophs
10. 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
Aphotic Zone animals
Littoral Zone
Nitrogen Cycle 4
Tropical Rain Forest Plants
11. Rhododendrons and pines are more suited for growth in acid oil
Omnivores
Tundra Biome
Benthos
Substratum-pH
12. Two fates await the ammonia (NH3). some are nitrified or dentrified
Tundra Biome
Nitrogen Cycle 5
Predator-Prey relationship
Competition Same Niche 3
13. 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
Producers
Omnivores
Nitrogen Cycle 5
14. Includes climate - temperature - availability of light and water - and the local topology
Aphotic Zone
Biome
Heterotrophs
Abiotic (Physical) Environment
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
Temperate Deciduous Forest Plants
Climate and weather
Commensalism
Nitrified
16. 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 Biome
Saprophytes
Aphotic Zone
Physical Environment-Sunlight
17. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Biotic Community
Substratum-texture
Material Cycles
Physical Environment-Temperature
18. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Taiga Animals
Secondary Consumers
Producers
Tropical Rain Forest Animals
19. One or both organisms can't survive without the other
Hydrosphere
Benthos
Obligatory
Photic Zone animals
20. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Pyramid of Mass
Obligatory
Photic Zone
Temperate Deciduous Forest Plants
21. Includes the community and the environment and usually all five kingdoms
Substratum (soil/rock)
Ecosystem
Substratum-pH
Desert Plants
22. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Temperate Coniferous Forest Biome
Pelagic Zone
Carbon Cycle 3
Temperate Coniferous Plants
23. Determines the nature of plant and animal life in the soil
Substratum (soil/rock)
Nitrogen Cycle 5
Marshes
Photic Zone
24. Distinct community in a geographic region
Conditions for stability in an Ecosystem
Tertiary Consumers
Temperate Deciduous Forest Biome
Biome
25. Include saprophytic organisms and organisms of decay
Lithosphere
Marine Biomes
Decomposer
Pyramid of Numbers
26. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Parasitism
Competition Same Niche
Pioneer Organism
Biosphere
27. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Ecological Succession
Desert Plants
Other Cycles
Cohesive Force
28. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Obligatory
Organism
Competition Same Niche 3
Nitrified
29. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Second Law of Thermodynamics
Substratum-texture
Commensalism
Environmental Factors
30. Determined by the same decisive factors-temperatures and rainfall
Competition
Aphotic Zone animals
Primary Consumers
Nature of Biomes
31. 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
Pyramid of Mass
Communities
Other Cycles
Pyramid of Numbers
32. Polar bears - musk oxen - and arctic hens
Food Chain
Decomposer
Thundra Animals
Climax Community
33. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Predator-Prey relationship
Tundra Plants
Cohesive Force
Pyramid of Numbers
34. Elemental nitrogen is chemically inert and cannot be used by most organisms. Lightning and nitrogen-fixing bacteria in the roots of legumes change the nitrogen into the usable - soluble nitrates
Carbon Cycle 3
Temperate Deciduous Forest Animals
Taiga Animals
Nitrogen cycle 1
35. The major component of the internal environment of all living things
Physical Environment- Water
Decomposer
Ecological Succession
Abiotic (Physical) Environment
36. Only animal life and other heterotrophic life exists
Thundra Animals
Climax Community
Aphotic Zone
Carbon Cycle 3
37. Animals eat plants and use the digested nutrients to form carbohydrates - fats - and proteins characteristic of the species. a part of these organic compounds is used as fuel in respiration in plants and animals
Carbon Cycle 1
Environment
Primary Consumers
Carbon Cycle 2
38. 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
Population
Competition Same Niche 3
Hydrosphere
Tertiary Consumers
39. Needs constant energy source and cycling of materials between the living system
Marshes
Tundra Biome
Conditions for stability in an Ecosystem
Physical Environment- Water
40. The study of interactions between organisms and their environment
Ecology
Biome
Producers
Pyramid of Mass
41. Food chain is not a simple linear chain but an intricate web
Freshwater Biomes
Producers
Temperate Deciduous Forest Plants
Food Web
42. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Competition Same Niche 3
Dominant Species
Pyramid of Energy
Food Chain
43. 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
Benthos
Competition
Pelagic Zone
44. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Parasitism
Aquatic Biomes
Aphotic Zone animals
Nitrogen Cycle 2
45. First to resettle a virgin area
Pioneer Organism
Pelagic Zone
Other Cycles
Competition Same Niche 3
46. Nekton and benthos - scavengers - and predators (fiercely competitive)
Primary Consumers
Photic Zone animals
Aphotic Zone animals
Nekton
47. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Temperate Deciduous Forest Animals
Nitrogen
Desert animals
Physical Environment- Water
48. Forest floors contain moss and lichens
Taiga Plants
Conditions for stability in an Ecosystem
Species
Nitrogen Cycle 2
49. Crawling and sessile organsms
Physical Environment-Sunlight
Benthos
Second Law of Thermodynamics
Mutualims
50. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Nitrogen Cycle 5
Grassland Animals
Producers
Photic zone