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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. First to resettle a virgin area
Community
Tundra Biome
Carbon Cycle 2
Pioneer Organism
2. One species may be competitively superior in some regions - and the other may be superior in other regions under different environmental conditions. this would result in the elimination of one species in some places and the other in other places
Aphotic Zone animals
Taiga Plants
Competition Same Niche 2
Tertiary Consumers
3. Crawling and sessile organsms
Second Law of Thermodynamics
Predators
Benthos
Nature of Biomes
4. 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
Niche
Carbon Cycle 3
Biome
Tropical Rain Forest Animals
5. Animals that consume dead animals
Photic zone
Poikilothermic (Cold Blooded)
Substratum (soil/rock)
Scavengers
6. 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
Rootlike holdfasts
Nitrogen Cycle 4
Pyramid of Energy
Temperate Deciduous Forest Animals
7. Distinct community in a geographic region
Climax Community
Biome
Dentrified
Pelagic Zone
8. Nekton and benthos - scavengers - and predators (fiercely competitive)
Predator-Prey relationship
Temperate Deciduous Forest Plants
Successive Communities
Aphotic Zone animals
9. Rhododendrons and pines are more suited for growth in acid oil
Substratum-pH
Tropical Rain Forest Plants
Dentrified
Parasitism
10. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Predator-Prey relationship
Nekton
Competition Same Niche 3
Aphotic Zone animals
11. One that exerts control over the other species that are present
Temperate Coniferous Plants
Substratum-Minerals
Grassland Animals
Dominant Species
12. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Physical Environment-Sunlight
Sere
Aquatic Biomes
Producers
13. When one organism is benefited by the association and the other is not affected
Decomposer
Material Cycles
Commensalism
Hydrosphere
14. Animals that eat both plants and animals
Omnivores
Scavengers
Littoral Zone
Food Chain
15. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Climax Community
Aphotic Zone
Taiga Animals
Secondary Consumers
16. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Environment
Tropical Rain Forest Plants
Physical Environment-Temperature
Pyramid of Numbers
17. 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
Environmental Factors
Other Cycles
Carbon Cycle 1
Taiga Plants
18. Sunlit layer of the open sea extending to a depth of 250-600ft
Tropical Rain Forest Plants
Coimax Vegetatioin
Photic zone
Epiphytes
19. Polar bears - musk oxen - and arctic hens
Taiga Plants
Nitrogen Cycle 3
Food Pyramids
Thundra Animals
20. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Symbionts
Organism
Niche
Nitrogen Cycle 3
21. Forest floors contain moss and lichens
Hemeothermic (Warm Blooded)
Taiga Plants
Nitrified
Autotrophs
22. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Nitrogen cycle 1
Autotrophs
Tropical Rain Forest Biome
Substratum-Minerals
23. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Ecological Succession
Competition
Sere
Environmental Factors
24. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Nitrogen
Deep-sea Organisms
Competition Same Niche
Climate and weather
25. Animals that consume only plants or plant foods
Carbon Cycle 1
Food Web
Herbivores
Environment
26. Receive less than ten inches of rain each year; the rain is concentrated within a few heavy cloudbursts -ex: Sahara in Africa and Gobi in Asia
Scavengers
Desert animals
Deep-sea Organisms
Desert Biome
27. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Competition
Organism
Tropical Rain Forest Plants
Biosphere
28. Organisms that manufacture their own food
Saprophytes
Biome
Autotrophs
Dominant Species
29. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Taiga Animals
Ecology
Intertidal Zone
Dentrified
30. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Tundra Biome
Temperate Deciduous Forest Biome
Physical Environment-Sunlight
Food Web
31. 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
Tundra Plants
Obligatory
Nitrogen cycle 1
Hemeothermic (Warm Blooded)
32. Determined by the same decisive factors-temperatures and rainfall
Carbon Cycle 2
Predator-Prey relationship
Nature of Biomes
Pyramid of Mass
33. Affect the type of vegetation that can be supported
Tropical Rain Forest Biome
Saprophytes
Substratum-Minerals
Marine Biomes
34. Integrated system of species that are dependent upon one another for survival
Parasitism
Marine Biomes
Community
Hydrosphere
35. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Population
Desert animals
Environmental Factors
Nekton
36. The vegetation that becomes dominant and stable after years of evolutiionary development
Nitrogen Cycle 4
Saprophytes
Tundra Biome
Coimax Vegetatioin
37. Free-living organisms that feed on other living organisms
Population
Food Web
Rootlike holdfasts
Predators
38. Links between oceans and land
Deep-sea Organisms
Physical Environment- Water
Marshes
Desert Biome
39. Determines water holding capacity
Producers
Aquatic Biomes
Pelagic Zone
Substratum-texture
40. Includes climate - temperature - availability of light and water - and the local topology
Temperate Deciduous Forest Animals
Dominant Species
Abiotic (Physical) Environment
Pyramid of Numbers
41. Determine by the amount of decaying plant and animal life in the soil
Other Cycles
Nitrogen Cycle 2
Physical Environment-Temperature
Substratum-Humus
42. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Nitrogen cycle 1
Commensalism
Predator-Prey relationship
Tropical Rain Forest Plants
43. Needs constant energy source and cycling of materials between the living system
Pyramid of Numbers
Conditions for stability in an Ecosystem
Substratum-texture
Biotic Community
44. When a parasite benefits at the expense of the host
Tropical Rain Forest Animals
Taiga Biome
Omnivores
Parasitism
45. Determines the nature of plant and animal life in the soil
Predator-Prey relationship
Substratum (soil/rock)
Abiotic (Physical) Environment
Hydrosphere
46. The ultimate source of energy for all organisms
Physical Environment-Sunlight
Ecology
Food Web
Species
47. Lichens and moss
Pioneer Organism
Biotic Environment
Tundra Plants
Climate and weather
48. Adaptations for maintaining their internal osmolarity and conserving water
Nitrogen Cycle 5
Osmoregulation
Intertidal Zone
Grassland Biome
49. 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
Tropical Rain Forest Biome
Competition Same Niche
Pyramid of Mass
Aphotic Zone
50. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Intertidal Zone
Marine Biomes
Predator-Prey relationship
Substratum (soil/rock)
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