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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. Determines the nature of plant and animal life in the soil
Dentrified
Photic zone
Biome
Substratum (soil/rock)
2. Crawling and sessile organsms
Benthos
Autotrophs
Ecosystem
Pioneer Organism
3. Needs constant energy source and cycling of materials between the living system
Ecosystem
Ecological Succession
Grassland Biome
Conditions for stability in an Ecosystem
4. One that exerts control over the other species that are present
Poikilothermic (Cold Blooded)
Dominant Species
Species
Biotic Environment
5. When one organism is benefited by the association and the other is not affected
Commensalism
Pelagic Zone
Desert Plants
Taiga Biome
6. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Substratum (soil/rock)
Intertidal Zone
Nitrogen cycle 1
Desert Biome
7. Affect the type of vegetation that can be supported
Substratum-Minerals
Tundra Biome
Photic zone
Producers
8. 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
Population
Aphotic Zone
Secondary Consumers
9. 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
Climax Community
Marine Biomes
Saprophytes
Photic zone
10. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Substratum-Minerals
Predator-Prey relationship
Temperate Deciduous Forest Biome
Tropical Rain Forest Animals
11. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Temperate Deciduous Forest Plants
Mutualims
Marine Biomes
Poikilothermic (Cold Blooded)
12. Encompasses all that is external to the organism and is necessary for its existence
Littoral Zone Populations
Environment
Hemeothermic (Warm Blooded)
Heterotrophs
13. Free-living organisms that feed on other living organisms
Organism
Taiga Biome
Predators
Temperate Deciduous Forest Plants
14. Nekton and benthos - scavengers - and predators (fiercely competitive)
Desert animals
Aphotic Zone animals
Carbon Cycle 2
Competition Same Niche 2
15. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Polar Region
Environmental Factors
Conditions for stability in an Ecosystem
Littoral Zone
16. Conserve water actively
Hydrosphere
Temperate Coniferous Plants
Physical Environment-Temperature
Desert Plants
17. Sunlit layer of the open sea extending to a depth of 250-600ft
Tropical Rain Forest Biome
Photic zone
Substratum-texture
Carbon Cycle 3
18. 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
Mutualims
Nekton
Competition Same Niche 2
Ecosystem
19. Group of organisms of the same species living together in a given location
Population
Poikilothermic (Cold Blooded)
Competition Same Niche
Nitrogen Cycle 5
20. Deer - fox - woodchuck - and squirrel
Physical Environment-Temperature
Symbionts
Tropical Rain Forest Plants
Temperate Deciduous Forest Animals
21. Community in an ecological succession is identified by a dominant species
Carnivores
Temperate Deciduous Forest Biome
Substratum-texture
Sere
22. Animals that consume dead animals
Scavengers
Aphotic Zone
Substratum-Humus
Decomposer
23. 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
Marshes
Ecological Succession
Biosphere
24. Organisms that manufacture their own food
Saprophytes
Carbon Cycle 1
Littoral Zone Populations
Autotrophs
25. Algae - crabs - crustacea - and many different species of fish
Littoral Zone Populations
Nitrified
Temperate Deciduous Forest Biome
Population
26. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Physical Environment-Temperature
Predator-Prey relationship
Climax Community
Ecology
27. Include reproduction and protection from predators and destructive weather
Intertidal Zone Population
Hemeothermic (Warm Blooded)
Climax Community
Cohesive Force
28. The vegetation that becomes dominant and stable after years of evolutiionary development
Coimax Vegetatioin
Lithosphere
Desert Plants
Successive Communities
29. Vegetation such as vines and eppiphytes
Coimax Vegetatioin
Aquatic Biomes
Epiphytes
Tropical Rain Forest Plants
30. The oceans
Coimax Vegetatioin
Hydrosphere
Tertiary Consumers
Temperate Deciduous Forest Plants
31. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Pyramid of Numbers
Freshwater Biomes
Competition Same Niche
Deep-sea Organisms
32. Developed long legs and many are hoofed
Grassland Animals
Physical Environment-Temperature
Tropical Rain Forest Plants
Cohesive Force
33. Only animal life and other heterotrophic life exists
Conditions for stability in an Ecosystem
Aphotic Zone
Food Pyramids
Intertidal Zone Population
34. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Nature of Biomes
Temperate Coniferous Plants
Physical Environment-Temperature
Substratum-Minerals
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
Abiotic (Physical) Environment
Nitrogen cycle 1
Niche
Taiga Plants
36. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Nitrogen Cycle 2
Carnivores
Nitrogen Cycle 3
Competition Same Niche 2
37. Rhododendrons and pines are more suited for growth in acid oil
Substratum-pH
Temperate Deciduous Forest Animals
Population
Parasitism
38. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Photic zone
Temperate Coniferous Plants
Epiphytes
Carbon Cycle 1
39. First to resettle a virgin area
Pioneer Organism
Marshes
Nitrogen Cycle 4
Environment
40. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Nitrogen Cycle 3
Aquatic Biomes
Poikilothermic (Cold Blooded)
Secondary Consumers
41. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Nitrogen Cycle 4
Pioneer Organism
Food Chain
Nature of Biomes
42. Determine by the amount of decaying plant and animal life in the soil
Tertiary Consumers
Intertidal Zone Population
Substratum-Humus
Heterotrophs
43. One or both organisms can't survive without the other
Obligatory
Epiphytes
Rootlike holdfasts
Tropical Rain Forest Animals
44. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Tropical Rain Forest Animals
Photic zone
Communities
Photic Zone animals
45. Recycle water - oxygen - and phosphorus
Species
Other Cycles
Substratum-Minerals
Intertidal Zone Population
46. Any group of similar organisms that are capable of reproducing
Taiga Plants
Species
Tropical Rain Forest Plants
Predator-Prey relationship
47. Animals that consume only plants or plant foods
Dentrified
Pyramid of Mass
Tropical Rain Forest Biome
Herbivores
48. Lichens and moss
Secondary Consumers
Dominant Species
Tundra Plants
Aphotic Zone animals
49. 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
Desert Plants
Second Law of Thermodynamics
Thundra Animals
Nitrogen cycle 1
50. Region typical of the open seas and can be divided into photic and aphotic zones
Taiga Biome
Commensalism
Hydrosphere
Pelagic Zone