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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. Animals that consume dead animals
Symbionts
Temperate Coniferous Forest Biome
Hypotonic
Scavengers
2. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Temperate Deciduous Forest Plants
Physical Environment-Sunlight
Physical Environment-Temperature
Primary Consumers
3. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Physical Environment-Sunlight
Tropical Rain Forest Animals
Taiga Animals
Nitrified
4. 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
Intraspecific Interactions
Marine Biomes
Secondary Consumers
Other Cycles
5. Determined by the same decisive factors-temperatures and rainfall
Saprophytes
Physical Environment- Water
Lithosphere
Nature of Biomes
6. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Marine Biomes
Tundra Biome
Climax Community
Carnivores
7. Consists of populations of different plants and animal species interacting with each other in a given environment
Autotrophs
Predator-Prey relationship
Communities
Competition
8. 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
Taiga Plants
Taiga Biome
Carbon Cycle 2
Epiphytes
9. One that exerts control over the other species that are present
Dominant Species
Symbionts
Pioneer Organism
Nitrogen Cycle 3
10. One or both organisms can't survive without the other
Commensalism
Photic Zone
Obligatory
Abiotic (Physical) Environment
11. Deer - fox - woodchuck - and squirrel
Primary Consumers
Mutualims
Temperate Deciduous Forest Animals
Heterotrophs
12. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Organism
Osmoregulation
Environmental Factors
Benthos
13. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Littoral Zone Populations
Heterotrophs
Food Chain
Photic Zone
14. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Climax Community
Taiga Biome
Tundra Biome
Nekton
15. Adaptations for maintaining their internal osmolarity and conserving water
Material Cycles
Taiga Animals
Osmoregulation
Grassland Biome
16. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Epiphytes
Ecological Succession
Substratum (soil/rock)
Ecosystem
17. Used to include only the population and not their physical environment
Nekton
Climate and weather
Intertidal Zone Population
Biotic Community
18. Food chain is not a simple linear chain but an intricate web
Climate and weather
Biome
Food Web
Grassland Animals
19. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Scavengers
Aphotic Zone
Hemeothermic (Warm Blooded)
Littoral Zone
20. Organisms that manufacture their own food
Taiga Biome
Autotrophs
Ecology
Pyramid of Energy
21. 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
Producers
Sere
Carnivores
Deep-sea Organisms
22. Animals that consume green plants (herbivores)
Communities
Primary Consumers
Environmental Factors
Temperate Coniferous Plants
23. The major component of the internal environment of all living things
Scavengers
Physical Environment- Water
Nitrogen Cycle 4
Substratum (soil/rock)
24. Vegetation such as vines and eppiphytes
Tropical Rain Forest Plants
Dominant Species
Tropical Rain Forest Biome
Taiga Biome
25. Include reproduction and protection from predators and destructive weather
Biome
Nature of Biomes
Cohesive Force
Marine Biomes
26. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Scavengers
Nitrogen Cycle 3
Organism
Conditions for stability in an Ecosystem
27. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Nitrogen Cycle 5
Deep-sea Organisms
Ecological Succession
Benthos
28. Lichens and moss
Successive Communities
Mutualims
Nitrogen Cycle 4
Tundra Plants
29. Symbiotic relationship from which both organisms derive some benefit
Mutualims
Climate and weather
Scavengers
Aphotic Zone animals
30. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Dentrified
Mutualims
Aphotic Zone
Species
31. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Aphotic Zone
Biosphere
Biotic Community
Substratum-pH
32. Animals that eat both plants and animals
Pioneer Organism
Nature of Biomes
Obligatory
Omnivores
33. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Predators
Food Chain
Other Cycles
Taiga Animals
34. Rock and soil surface
Nitrified
Pyramid of Numbers
Lithosphere
Abiotic (Physical) Environment
35. The chief disruptive force
Species
Tundra Biome
Nitrified
Competition
36. Nekton and benthos - scavengers - and predators (fiercely competitive)
Rootlike holdfasts
Thundra Animals
Aphotic Zone animals
Epiphytes
37. Group of organisms of the same species living together in a given location
Desert animals
Biotic Community
Dominant Species
Population
38. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Environmental Factors
Marshes
Competition Same Niche
Symbionts
39. Needs constant energy source and cycling of materials between the living system
Dentrified
Conditions for stability in an Ecosystem
Pyramid of Numbers
Substratum-Humus
40. 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
Pyramid of Energy
Hypotonic
Rootlike holdfasts
Pyramid of Numbers
41. 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 Deciduous Forest Animals
Substratum-pH
Food Pyramids
Temperate Coniferous Forest Biome
42. Includes the community and the environment and usually all five kingdoms
Commensalism
Dominant Species
Ecosystem
Biosphere
43. 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
Mutualims
Marshes
Saprophytes
Temperate Deciduous Forest Animals
44. Free-living organisms that feed on other living organisms
Competition Same Niche 2
Aphotic Zone
Pelagic Zone
Predators
45. Encompasses all that is external to the organism and is necessary for its existence
Physical Environment- Water
Temperate Deciduous Forest Biome
Environment
Carbon Cycle 2
46. 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
Conditions for stability in an Ecosystem
Food Chain
Competition Same Niche 3
Successive Communities
47. First to resettle a virgin area
Parasitism
Pioneer Organism
Substratum-Humus
Scavengers
48. 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
Tertiary Consumers
Carbon Cycle 3
Photic Zone
Desert Biome
49. Animals that feed on secondary consumer
Sere
Biosphere
Tertiary Consumers
Parasitism
50. Sunlit layer of the open sea extending to a depth of 250-600ft
Photic zone
Thundra Animals
Desert Biome
Deep-sea Organisms