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Test your basic knowledge |
PCAT Biology Ecology
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Subjects
:
pcat
,
biology
Instructions:
Answer 50 questions in 15 minutes.
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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. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Poikilothermic (Cold Blooded)
Carbon Cycle 3
Hydrosphere
Photic Zone animals
2. 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
Benthos
Temperate Deciduous Forest Animals
Climate and weather
Coimax Vegetatioin
3. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Photic zone
Poikilothermic (Cold Blooded)
Other Cycles
Littoral Zone
4. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Thundra Animals
Nitrogen Cycle 2
Other Cycles
Nitrogen Cycle 3
5. One species may be competitively superior to the other and drive the second to extinction
Hypotonic
Carbon Cycle 1
Taiga Plants
Competition Same Niche
6. Consists of populations of different plants and animal species interacting with each other in a given environment
Communities
Pyramid of Numbers
Grassland Biome
Nitrogen cycle 1
7. Sunlit layer of the open sea extending to a depth of 250-600ft
Intertidal Zone
Herbivores
Photic zone
Desert Biome
8. 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
Carbon Cycle 3
Hypotonic
Decomposer
Temperate Coniferous Forest Biome
9. 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
Aphotic Zone
Obligatory
Nekton
Niche
10. Symbiotic relationship from which both organisms derive some benefit
Polar Region
Taiga Animals
Desert Biome
Mutualims
11. One or both organisms can't survive without the other
Obligatory
Food Chain
Desert animals
Herbivores
12. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Tropical Rain Forest Plants
Substratum-texture
Epiphytes
Organism
13. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Marine Biomes
Substratum-pH
Heterotrophs
Environment
14. 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
Biotic Environment
Dominant Species
Nitrogen cycle 1
Carbon Cycle 2
15. The vegetation that becomes dominant and stable after years of evolutiionary development
Tropical Rain Forest Plants
Coimax Vegetatioin
Tundra Biome
Pyramid of Energy
16. Integrated system of species that are dependent upon one another for survival
Carnivores
Pioneer Organism
Coimax Vegetatioin
Community
17. Includes climate - temperature - availability of light and water - and the local topology
Nitrogen cycle 1
Taiga Animals
Abiotic (Physical) Environment
Aquatic Biomes
18. Determined by the same decisive factors-temperatures and rainfall
Carbon Cycle 3
Photic zone
Nature of Biomes
Taiga Biome
19. 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 3
Temperate Coniferous Forest Biome
Producers
Nitrogen
20. First to resettle a virgin area
Marine Biomes
Pioneer Organism
Aquatic Biomes
Substratum-pH
21. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Nitrogen cycle 1
Second Law of Thermodynamics
Sere
Temperate Deciduous Forest Plants
22. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Temperate Deciduous Forest Biome
Climax Community
Nitrogen Cycle 4
Competition Same Niche 2
23. Rock and soil surface
Producers
Lithosphere
Conditions for stability in an Ecosystem
Hydrosphere
24. Lichens and moss
Osmoregulation
Tundra Plants
Tundra Biome
Obligatory
25. The oceans
Ecological Succession
Nitrogen Cycle 4
Hydrosphere
Autotrophs
26. Recycle water - oxygen - and phosphorus
Pyramid of Energy
Omnivores
Other Cycles
Substratum-Minerals
27. 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
Nitrogen Cycle 4
Second Law of Thermodynamics
Carbon Cycle 1
Thundra Animals
28. Two fates await the ammonia (NH3). some are nitrified or dentrified
Desert Biome
Physical Environment- Water
Nitrogen Cycle 5
Pyramid of Numbers
29. Used to include only the population and not their physical environment
Taiga Plants
Biotic Community
Dentrified
Nitrogen Cycle 4
30. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Nitrogen Cycle 4
Grassland Animals
Physical Environment-Sunlight
31. Includes the community and the environment and usually all five kingdoms
Competition Same Niche 3
Commensalism
Ecosystem
Obligatory
32. Animals that feed on secondary consumer
Mutualims
Tundra Plants
Tertiary Consumers
Material Cycles
33. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Physical Environment-Temperature
Carbon Cycle 1
Nitrogen
Nitrified
34. 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
Tropical Rain Forest Animals
Aquatic Biomes
Biosphere
Environment
35. Developed long legs and many are hoofed
Pyramid of Mass
Nekton
Material Cycles
Grassland Animals
36. 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
Temperate Deciduous Forest Plants
Saprophytes
Conditions for stability in an Ecosystem
Nekton
37. Adaptations for maintaining their internal osmolarity and conserving water
Osmoregulation
Nitrified
Nitrogen Cycle 4
Abiotic (Physical) Environment
38. Determines water holding capacity
Second Law of Thermodynamics
Ecological Succession
Competition Same Niche 2
Substratum-texture
39. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Cohesive Force
Nitrogen
Deep-sea Organisms
Tundra Plants
40. Region typical of the open seas and can be divided into photic and aphotic zones
Poikilothermic (Cold Blooded)
Rootlike holdfasts
Pelagic Zone
Substratum-pH
41. Animals that eat both plants and animals
Omnivores
Autotrophs
Nitrogen Cycle 4
Cohesive Force
42. Food chain is not a simple linear chain but an intricate web
Hemeothermic (Warm Blooded)
Food Web
Environmental Factors
Benthos
43. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Species
Intertidal Zone
Hydrosphere
Predators
44. 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
Grassland Animals
Temperate Coniferous Plants
Communities
45. 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
Desert animals
Competition Same Niche 2
Coimax Vegetatioin
46. 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
Niche
Pyramid of Numbers
Taiga Biome
Hydrosphere
47. The chief disruptive force
Physical Environment-Temperature
Competition
Pyramid of Energy
Herbivores
48. Determines the nature of plant and animal life in the soil
Taiga Biome
Substratum (soil/rock)
Biosphere
Biome
49. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Omnivores
Symbionts
Predator-Prey relationship
Nitrogen
50. Composed of populations that are able to exist under the new conditions
Competition Same Niche 2
Organism
Competition
Successive Communities
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