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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. 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
Dentrified
Nitrogen Cycle 4
Lithosphere
Physical Environment-Sunlight
2. Include reproduction and protection from predators and destructive weather
Cohesive Force
Substratum (soil/rock)
Food Chain
Predators
3. Nekton and benthos - scavengers - and predators (fiercely competitive)
Aphotic Zone animals
Material Cycles
Aquatic Biomes
Rootlike holdfasts
4. 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
Freshwater Biomes
Food Chain
Food Pyramids
Desert Plants
5. 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
Heterotrophs
Scavengers
Dominant Species
6. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Temperate Coniferous Forest Biome
Nitrogen cycle 1
Substratum-Humus
7. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Tertiary Consumers
Temperate Deciduous Forest Plants
Mutualims
Ecosystem
8. Animals that eat both plants and animals
Pyramid of Mass
Omnivores
Tropical Rain Forest Biome
Secondary Consumers
9. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Nitrogen Cycle 5
Benthos
Biosphere
Pyramid of Numbers
10. Determines water holding capacity
Temperate Coniferous Plants
Poikilothermic (Cold Blooded)
Substratum-texture
Nitrogen
11. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Food Chain
Temperate Coniferous Plants
Epiphytes
Desert animals
12. Region typical of the open seas and can be divided into photic and aphotic zones
Pelagic Zone
Aquatic Biomes
Deep-sea Organisms
Nature of Biomes
13. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Producers
Aphotic Zone
Substratum-Humus
Hypotonic
14. Integrated system of species that are dependent upon one another for survival
Aphotic Zone
Material Cycles
Substratum-texture
Community
15. Freshwater Biomes vs. Saltwater 2: In rivers and streams - strong swift currents exist - and thus fish that have developed strong muscles and plants with _____________ have survived
Predator-Prey relationship
Scavengers
Rootlike holdfasts
Biosphere
16. Consists of populations of different plants and animal species interacting with each other in a given environment
Environmental Factors
Taiga Biome
Climax Community
Communities
17. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Photic Zone
Sere
Aquatic Biomes
Temperate Coniferous Forest Biome
18. Regiong beneatht he photic zone that receives no light
Second Law of Thermodynamics
Aphotic Zone
Temperate Deciduous Forest Animals
Herbivores
19. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Benthos
Organism
Pyramid of Numbers
Substratum-texture
20. Symbiotic relationship from which both organisms derive some benefit
Mutualims
Herbivores
Marine Biomes
Substratum-Humus
21. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Ecological Succession
Predators
Substratum-texture
Nekton
22. One species may be competitively superior to the other and drive the second to extinction
Dentrified
Material Cycles
Taiga Animals
Competition Same Niche
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
Osmoregulation
Primary Consumers
Population
24. 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
Intertidal Zone Population
Substratum-texture
Carbon Cycle 1
Biotic Community
25. 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
Intertidal Zone
Competition Same Niche 2
Autotrophs
26. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Second Law of Thermodynamics
Carbon Cycle 2
Aquatic Biomes
Heterotrophs
27. 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
Marshes
Environment
Niche
Nitrogen Cycle 2
28. Affect the type of vegetation that can be supported
Ecosystem
Substratum-Minerals
Temperate Coniferous Forest Biome
Carbon Cycle 1
29. Distinct community in a geographic region
Aphotic Zone
Predators
Biome
Obligatory
30. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Nekton
Temperate Deciduous Forest Plants
Environment
Aphotic Zone animals
31. Determines the nature of plant and animal life in the soil
Competition Same Niche 2
Substratum (soil/rock)
Dominant Species
Substratum-Minerals
32. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Temperate Deciduous Forest Biome
Desert Biome
Physical Environment- Water
Benthos
33. Individuals belonging to the same species use the same resources and if a particular resource is limited - then these organisms must compete with one another
Intraspecific Interactions
Food Pyramids
Biotic Environment
Marshes
34. Recycle water - oxygen - and phosphorus
Marine Biomes
Pioneer Organism
Other Cycles
Heterotrophs
35. Food chain is not a simple linear chain but an intricate web
Taiga Animals
Commensalism
Food Web
Photic Zone
36. Vegetation such as vines and eppiphytes
Dentrified
Tropical Rain Forest Plants
Nitrogen Cycle 4
Photic Zone
37. Links between oceans and land
Ecological Succession
Marshes
Physical Environment- Water
Competition Same Niche 2
38. One that exerts control over the other species that are present
Population
Littoral Zone Populations
Dominant Species
Deep-sea Organisms
39. Polar bears - musk oxen - and arctic hens
Competition Same Niche 3
Desert Biome
Thundra Animals
Ecology
40. 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
Sere
Niche
Physical Environment- Water
Carbon Cycle 3
41. 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
Second Law of Thermodynamics
Substratum-Humus
Physical Environment-Temperature
Food Pyramids
42. Only animal life and other heterotrophic life exists
Photic Zone animals
Aphotic Zone
Primary Consumers
Carnivores
43. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Pyramid of Mass
Polar Region
Successive Communities
Lithosphere
44. The oceans
Substratum (soil/rock)
Hypotonic
Tundra Plants
Hydrosphere
45. Animals that consume green plants (herbivores)
Taiga Biome
Substratum (soil/rock)
Primary Consumers
Pyramid of Mass
46. Encompasses all that is external to the organism and is necessary for its existence
Rootlike holdfasts
Environment
Primary Consumers
Nitrogen Cycle 2
47. Developed long legs and many are hoofed
Material Cycles
Grassland Animals
Food Chain
Temperate Deciduous Forest Biome
48. Rhododendrons and pines are more suited for growth in acid oil
Temperate Coniferous Plants
Benthos
Nitrified
Substratum-pH
49. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Symbionts
Saprophytes
Hypotonic
Tropical Rain Forest Biome
50. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Dentrified
Nitrogen Cycle 2
Biome
Poikilothermic (Cold Blooded)