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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. Distinct community in a geographic region
Coimax Vegetatioin
Biotic Environment
Ecology
Biome
2. Free-living organisms that feed on other living organisms
Nitrogen Cycle 2
Dominant Species
Predators
Other Cycles
3. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Taiga Biome
Grassland Animals
Dentrified
Environment
4. Region typical of the open seas and can be divided into photic and aphotic zones
Conditions for stability in an Ecosystem
Ecological Succession
Aphotic Zone animals
Pelagic Zone
5. Affect the type of vegetation that can be supported
Commensalism
Omnivores
Pioneer Organism
Substratum-Minerals
6. Polar bears - musk oxen - and arctic hens
Thundra Animals
Second Law of Thermodynamics
Predator-Prey relationship
Biotic Community
7. When one organism is benefited by the association and the other is not affected
Commensalism
Communities
Pyramid of Energy
Tundra Biome
8. Regiong beneatht he photic zone that receives no light
Aphotic Zone
Carbon Cycle 2
Dentrified
Carnivores
9. One or both organisms can't survive without the other
Marine Biomes
Desert Plants
Obligatory
Biosphere
10. Freshwater Biomes vs. Saltwater 1: Freshwater is _______________ which results in the passage of water into the cell. Freshwater organisms have homeostatic mechanisms to maintain water balance by the regular removal of the excess water. these include
Autotrophs
Hypotonic
Carbon Cycle 2
Desert Plants
11. 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
Nitrified
Niche
Competition
Competition Same Niche 2
12. Symbiotic relationship from which both organisms derive some benefit
Biotic Community
Mutualims
Nitrogen Cycle 3
Nitrogen Cycle 2
13. Determines water holding capacity
Nitrogen Cycle 5
Substratum-texture
Ecological Succession
Carbon Cycle 1
14. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Food Pyramids
Temperate Deciduous Forest Animals
Food Chain
Ecology
15. Animals that consume dead animals
Temperate Coniferous Forest Biome
Scavengers
Photic Zone animals
Commensalism
16. Group of organisms of the same species living together in a given location
Climax Community
Temperate Deciduous Forest Animals
Desert Plants
Population
17. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Benthos
Hypotonic
Taiga Animals
Polar Region
18. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Rootlike holdfasts
Successive Communities
Intertidal Zone
Autotrophs
19. 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
Photic Zone
Competition Same Niche
Biome
Taiga Biome
20. Rhododendrons and pines are more suited for growth in acid oil
Biome
Substratum-pH
Food Pyramids
Carbon Cycle 1
21. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Biosphere
Physical Environment-Sunlight
Nitrogen Cycle 4
Nitrogen
22. Food chain is not a simple linear chain but an intricate web
Osmoregulation
Biotic Community
Rootlike holdfasts
Food Web
23. Include saprophytic organisms and organisms of decay
Marshes
Pyramid of Numbers
Pioneer Organism
Decomposer
24. Every energy transfer involves a loss of energy and each level of the food chain uses some of the energy it obtains from the food for its own metabolism and loses some additional energy in the form of heat
Nitrified
Food Chain
Thundra Animals
Second Law of Thermodynamics
25. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Poikilothermic (Cold Blooded)
Biosphere
Climax Community
Desert animals
26. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Photic zone
Physical Environment-Temperature
Predators
Nitrified
27. The major component of the internal environment of all living things
Intraspecific Interactions
Decomposer
Pioneer Organism
Physical Environment- Water
28. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Tropical Rain Forest Biome
Environmental Factors
Dominant Species
Primary Consumers
29. Include reproduction and protection from predators and destructive weather
Nitrogen Cycle 2
Cohesive Force
Substratum-pH
Physical Environment-Sunlight
30. 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
Benthos
Tundra Biome
Hypotonic
Substratum (soil/rock)
31. Needs constant energy source and cycling of materials between the living system
Poikilothermic (Cold Blooded)
Abiotic (Physical) Environment
Conditions for stability in an Ecosystem
Taiga Biome
32. Crawling and sessile organsms
Benthos
Species
Thundra Animals
Competition Same Niche 3
33. 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
Desert animals
Carbon Cycle 3
Competition Same Niche 2
Ecological Succession
34. Animals that feed on secondary consumer
Climate and weather
Tertiary Consumers
Taiga Plants
Carnivores
35. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Nitrified
Ecological Succession
Physical Environment- Water
Carbon Cycle 2
36. Includes the community and the environment and usually all five kingdoms
Ecosystem
Dentrified
Desert Plants
Temperate Deciduous Forest Biome
37. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Taiga Animals
Other Cycles
Mutualims
Second Law of Thermodynamics
38. When a parasite benefits at the expense of the host
Littoral Zone
Parasitism
Obligatory
Tropical Rain Forest Plants
39. Encompasses all that is external to the organism and is necessary for its existence
Desert animals
Temperate Coniferous Plants
Intraspecific Interactions
Environment
40. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Organism
Biosphere
Temperate Coniferous Forest Biome
Parasitism
41. Animals that eat both plants and animals
Substratum-pH
Omnivores
Aphotic Zone
Temperate Deciduous Forest Biome
42. 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
Grassland Biome
Abiotic (Physical) Environment
Carnivores
Mutualims
43. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Scavengers
Competition Same Niche 3
Predator-Prey relationship
Material Cycles
44. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Tropical Rain Forest Biome
Hemeothermic (Warm Blooded)
Intraspecific Interactions
Epiphytes
45. The vegetation that becomes dominant and stable after years of evolutiionary development
Hypotonic
Coimax Vegetatioin
Communities
Temperate Deciduous Forest Biome
46. Used to include only the population and not their physical environment
Desert Plants
Rootlike holdfasts
Biotic Community
Dentrified
47. The study of interactions between organisms and their environment
Aphotic Zone animals
Nitrified
Tropical Rain Forest Plants
Ecology
48. Lichens and moss
Second Law of Thermodynamics
Photic Zone animals
Ecological Succession
Tundra Plants
49. Without a constant input of energy from the sun - an ecosystem would soon run down - as food is transferred from one level of the food chain to the next - a transfer of energy occurs
Food Pyramids
Substratum-Minerals
Physical Environment- Water
Abiotic (Physical) Environment
50. Forest floors contain moss and lichens
Taiga Plants
Pyramid of Energy
Carbon Cycle 1
Competition Same Niche