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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. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Food Chain
Desert Plants
Tropical Rain Forest Animals
Substratum-Humus
2. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Competition Same Niche 2
Aphotic Zone
Symbionts
Substratum-Minerals
3. Rock and soil surface
Commensalism
Ecological Succession
Intraspecific Interactions
Lithosphere
4. Organisms that manufacture their own food
Food Pyramids
Autotrophs
Competition Same Niche 3
Ecology
5. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Other Cycles
Nitrogen Cycle 2
Food Pyramids
Nekton
6. Include saprophytic organisms and organisms of decay
Decomposer
Aphotic Zone
Tropical Rain Forest Biome
Abiotic (Physical) Environment
7. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Food Chain
Polar Region
Physical Environment-Sunlight
Epiphytes
8. 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
Carnivores
Nitrogen Cycle 4
Material Cycles
Nature of Biomes
9. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Lithosphere
Nitrogen Cycle 3
Scavengers
Deep-sea Organisms
10. The ultimate source of energy for all organisms
Marine Biomes
Physical Environment-Sunlight
Marshes
Substratum-Humus
11. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Ecology
Aphotic Zone
Nitrogen
Taiga Animals
12. Conserve water actively
Freshwater Biomes
Scavengers
Desert Biome
Desert Plants
13. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Dominant Species
Photic Zone animals
Grassland Biome
Osmoregulation
14. Animals that consume green plants (herbivores)
Primary Consumers
Pyramid of Numbers
Pelagic Zone
Commensalism
15. Encompasses all that is external to the organism and is necessary for its existence
Hypotonic
Autotrophs
Thundra Animals
Environment
16. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Temperate Coniferous Forest Biome
Heterotrophs
Desert animals
Tundra Biome
17. Animals that consume dead animals
Scavengers
Environment
Nitrogen cycle 1
Nitrogen Cycle 5
18. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Photic zone
Nitrogen Cycle 4
Nitrogen Cycle 2
19. One or both organisms can't survive without the other
Substratum-texture
Physical Environment-Sunlight
Pyramid of Numbers
Obligatory
20. Rhododendrons and pines are more suited for growth in acid oil
Herbivores
Pyramid of Numbers
Taiga Plants
Substratum-pH
21. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Commensalism
Obligatory
Hemeothermic (Warm Blooded)
Temperate Coniferous Forest Biome
22. 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 1
Second Law of Thermodynamics
Secondary Consumers
Hypotonic
23. Determines water holding capacity
Coimax Vegetatioin
Biotic Environment
Taiga Animals
Substratum-texture
24. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Hemeothermic (Warm Blooded)
Climax Community
Obligatory
Scavengers
25. Community in an ecological succession is identified by a dominant species
Decomposer
Sere
Communities
Carbon Cycle 3
26. Forest floors contain moss and lichens
Predators
Taiga Plants
Nitrogen Cycle 3
Biosphere
27. Determined by the same decisive factors-temperatures and rainfall
Species
Autotrophs
Nature of Biomes
Communities
28. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Secondary Consumers
Predators
Littoral Zone
Photic Zone animals
29. Recycle water - oxygen - and phosphorus
Littoral Zone Populations
Thundra Animals
Environmental Factors
Other Cycles
30. 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
Pyramid of Numbers
Rootlike holdfasts
Food Pyramids
Carbon Cycle 1
31. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Heterotrophs
Pioneer Organism
Nitrogen
Other Cycles
32. 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
Competition Same Niche 2
Heterotrophs
Dentrified
Poikilothermic (Cold Blooded)
33. Determine by the amount of decaying plant and animal life in the soil
Aphotic Zone
Substratum-Humus
Climate and weather
Substratum-texture
34. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Decomposer
Predator-Prey relationship
Predators
Nitrogen Cycle 3
35. 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
Littoral Zone
Nitrogen cycle 1
Temperate Deciduous Forest Plants
Niche
36. Include reproduction and protection from predators and destructive weather
Carbon Cycle 2
Photic zone
Obligatory
Cohesive Force
37. The study of interactions between organisms and their environment
Herbivores
Hypotonic
Ecology
Substratum-Minerals
38. Integrated system of species that are dependent upon one another for survival
Conditions for stability in an Ecosystem
Tropical Rain Forest Plants
Substratum-Humus
Community
39. 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
Climate and weather
Nitrogen cycle 1
Food Web
Aphotic Zone animals
40. Affect the type of vegetation that can be supported
Littoral Zone
Substratum-Minerals
Nitrogen cycle 1
Material Cycles
41. Needs constant energy source and cycling of materials between the living system
Biotic Environment
Competition
Conditions for stability in an Ecosystem
Sere
42. 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
Omnivores
Nitrogen Cycle 5
Biome
Competition Same Niche 3
43. Links between oceans and land
Symbionts
Temperate Deciduous Forest Animals
Taiga Biome
Marshes
44. Animals that consume only plants or plant foods
Herbivores
Temperate Deciduous Forest Animals
Mutualims
Secondary Consumers
45. Rivers - lakes - ponds - and marshes
Environment
Temperate Deciduous Forest Animals
Freshwater Biomes
Competition
46. Region typical of the open seas and can be divided into photic and aphotic zones
Pelagic Zone
Desert Plants
Temperate Deciduous Forest Plants
Decomposer
47. Determines the nature of plant and animal life in the soil
Pyramid of Mass
Carbon Cycle 2
Substratum (soil/rock)
Saprophytes
48. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Epiphytes
Biosphere
Intraspecific Interactions
Photic zone
49. Sunlit layer of the open sea extending to a depth of 250-600ft
Scavengers
Photic zone
Nitrogen Cycle 3
Physical Environment-Temperature
50. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Tropical Rain Forest Animals
Tropical Rain Forest Biome
Community
Substratum-Minerals