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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. The oceans
Competition Same Niche
Ecosystem
Physical Environment-Temperature
Hydrosphere
2. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Nitrogen Cycle 4
Biome
Competition
Organism
3. When one organism is benefited by the association and the other is not affected
Thundra Animals
Commensalism
Hypotonic
Communities
4. Forest floors contain moss and lichens
Nitrogen Cycle 5
Species
Taiga Plants
Organism
5. Animals that eat both plants and animals
Biome
Conditions for stability in an Ecosystem
Coimax Vegetatioin
Omnivores
6. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Nitrogen Cycle 3
Freshwater Biomes
Carnivores
Taiga Animals
7. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Osmoregulation
Photic Zone
Nitrogen Cycle 3
Material Cycles
8. Crawling and sessile organsms
Autotrophs
Conditions for stability in an Ecosystem
Saprophytes
Benthos
9. Rhododendrons and pines are more suited for growth in acid oil
Temperate Deciduous Forest Biome
Substratum-Minerals
Substratum-pH
Pelagic Zone
10. One that exerts control over the other species that are present
Pioneer Organism
Littoral Zone Populations
Conditions for stability in an Ecosystem
Dominant Species
11. 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
Nitrogen Cycle 3
Aquatic Biomes
Deep-sea Organisms
Nitrogen cycle 1
12. Animals that feed on secondary consumer
Tertiary Consumers
Polar Region
Temperate Coniferous Plants
Saprophytes
13. Treeless - frozen plain found between the taiga lands and the northern ice sheets - very short summer and thus a very short growing season during which time the ground becomes wet and marshy
Tundra Biome
Community
Polar Region
Temperate Coniferous Forest Biome
14. The chief disruptive force
Competition
Heterotrophs
Ecological Succession
Nitrogen cycle 1
15. Organisms that manufacture their own food
Heterotrophs
Autotrophs
Marine Biomes
Ecology
16. Includes climate - temperature - availability of light and water - and the local topology
Abiotic (Physical) Environment
Grassland Animals
Herbivores
Niche
17. Polar bears - musk oxen - and arctic hens
Sere
Thundra Animals
Pyramid of Numbers
Nekton
18. 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
Carbon Cycle 3
Marshes
Substratum-pH
Desert Biome
19. Determined by the same decisive factors-temperatures and rainfall
Grassland Animals
Littoral Zone Populations
Competition Same Niche
Nature of Biomes
20. 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
Temperate Deciduous Forest Animals
Coimax Vegetatioin
Parasitism
21. 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
Saprophytes
Biome
Community
Abiotic (Physical) Environment
22. Determines the nature of plant and animal life in the soil
Tropical Rain Forest Plants
Autotrophs
Substratum (soil/rock)
Aphotic Zone
23. 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
Pelagic Zone
Grassland Biome
Food Chain
Deep-sea Organisms
24. The major component of the internal environment of all living things
Physical Environment- Water
Saprophytes
Biotic Environment
Decomposer
25. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Community
Environmental Factors
Desert Biome
Littoral Zone Populations
26. First to resettle a virgin area
Freshwater Biomes
Deep-sea Organisms
Pioneer Organism
Obligatory
27. Recycle water - oxygen - and phosphorus
Other Cycles
Carbon Cycle 1
Tropical Rain Forest Biome
Temperate Coniferous Plants
28. Determine by the amount of decaying plant and animal life in the soil
Intertidal Zone
Producers
Substratum-Humus
Osmoregulation
29. Two fates await the ammonia (NH3). some are nitrified or dentrified
Food Chain
Physical Environment-Sunlight
Population
Nitrogen Cycle 5
30. Animals that consume only plants or plant foods
Poikilothermic (Cold Blooded)
Biotic Community
Deep-sea Organisms
Herbivores
31. When a parasite benefits at the expense of the host
Environmental Factors
Parasitism
Tropical Rain Forest Biome
Hypotonic
32. Animals that consume green plants (herbivores)
Primary Consumers
Temperate Deciduous Forest Plants
Decomposer
Abiotic (Physical) Environment
33. 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
Desert Biome
Deep-sea Organisms
Marshes
34. Regiong beneatht he photic zone that receives no light
Aphotic Zone
Competition
Material Cycles
Pyramid of Numbers
35. 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
Sere
Hypotonic
Temperate Coniferous Forest Biome
Tropical Rain Forest Plants
36. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Lithosphere
Carbon Cycle 2
Material Cycles
Producers
37. 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
Nitrogen cycle 1
Deep-sea Organisms
Pelagic Zone
Competition Same Niche 3
38. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Carbon Cycle 3
Polar Region
Dentrified
Sere
39. Lichens and moss
Ecology
Tundra Plants
Herbivores
Environmental Factors
40. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Communities
Biosphere
Temperate Coniferous Forest Biome
Littoral Zone
41. Distinct community in a geographic region
Temperate Coniferous Forest Biome
Nitrogen cycle 1
Biotic Community
Biome
42. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Tropical Rain Forest Animals
Nitrified
Temperate Coniferous Forest Biome
Deep-sea Organisms
43. Any group of similar organisms that are capable of reproducing
Tropical Rain Forest Biome
Ecosystem
Species
Tertiary Consumers
44. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Nekton
Communities
Poikilothermic (Cold Blooded)
Photic Zone animals
45. 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
Nitrified
Predator-Prey relationship
Successive Communities
Carbon Cycle 1
46. Include saprophytic organisms and organisms of decay
Other Cycles
Autotrophs
Decomposer
Photic Zone animals
47. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Desert Plants
Communities
Sere
Marine Biomes
48. 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
Climax Community
Heterotrophs
Autotrophs
49. Deer - fox - woodchuck - and squirrel
Coimax Vegetatioin
Aphotic Zone animals
Temperate Deciduous Forest Animals
Temperate Deciduous Forest Plants
50. Links between oceans and land
Biotic Environment
Environmental Factors
Marshes
Saprophytes
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