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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. Animals that consume dead animals
Scavengers
Biotic Community
Secondary Consumers
Food Chain
2. Group of organisms of the same species living together in a given location
Nitrogen Cycle 5
Biosphere
Substratum-Minerals
Population
3. Integrated system of species that are dependent upon one another for survival
Community
Species
Environmental Factors
Desert animals
4. The major component of the internal environment of all living things
Temperate Deciduous Forest Biome
Competition Same Niche
Physical Environment- Water
Substratum-pH
5. First to resettle a virgin area
Deep-sea Organisms
Freshwater Biomes
Hemeothermic (Warm Blooded)
Pioneer Organism
6. Any group of similar organisms that are capable of reproducing
Species
Food Chain
Photic Zone animals
Nitrogen Cycle 5
7. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Hemeothermic (Warm Blooded)
Marine Biomes
Intertidal Zone Population
Temperate Coniferous Plants
8. Animals that consume only plants or plant foods
Biome
Littoral Zone Populations
Marshes
Herbivores
9. 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
Competition Same Niche 2
Carbon Cycle 3
Nitrogen Cycle 2
Physical Environment-Temperature
10. Encompasses all that is external to the organism and is necessary for its existence
Conditions for stability in an Ecosystem
Successive Communities
Pelagic Zone
Environment
11. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Nitrogen Cycle 2
Photic Zone animals
Rootlike holdfasts
Nitrogen
12. Determined by the same decisive factors-temperatures and rainfall
Climax Community
Polar Region
Biotic Community
Nature of Biomes
13. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Climax Community
Omnivores
Taiga Animals
Hypotonic
14. 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
Nitrified
Omnivores
Marine Biomes
15. Animals that eat both plants and animals
Omnivores
Photic Zone
Temperate Deciduous Forest Biome
Parasitism
16. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Material Cycles
Biotic Environment
Ecological Succession
Physical Environment- Water
17. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Nitrogen
Environmental Factors
Tundra Biome
Substratum (soil/rock)
18. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Lithosphere
Hemeothermic (Warm Blooded)
Heterotrophs
Hydrosphere
19. Sunlit layer of the open sea extending to a depth of 250-600ft
Nitrogen Cycle 4
Ecological Succession
Biosphere
Photic zone
20. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Competition Same Niche 2
Deep-sea Organisms
Intertidal Zone Population
Taiga Plants
21. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Tundra Biome
Temperate Coniferous Plants
Physical Environment-Temperature
Substratum-texture
22. Animals that feed on secondary consumer
Tertiary Consumers
Autotrophs
Nitrogen cycle 1
Abiotic (Physical) Environment
23. Animals that consume green plants (herbivores)
Primary Consumers
Substratum-texture
Carbon Cycle 1
Aphotic Zone
24. 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
Substratum (soil/rock)
Food Pyramids
Temperate Coniferous Forest Biome
Conditions for stability in an Ecosystem
25. Region typical of the open seas and can be divided into photic and aphotic zones
Hydrosphere
Climate and weather
Lithosphere
Pelagic Zone
26. 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
Carbon Cycle 1
Temperate Deciduous Forest Animals
Taiga Plants
Tropical Rain Forest Plants
27. Organisms that manufacture their own food
Sere
Substratum-texture
Autotrophs
Littoral Zone Populations
28. Rhododendrons and pines are more suited for growth in acid oil
Substratum-pH
Benthos
Substratum-texture
Food Web
29. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Coimax Vegetatioin
Hypotonic
Photic Zone
Taiga Plants
30. Determine by the amount of decaying plant and animal life in the soil
Substratum-Humus
Pioneer Organism
Nitrogen Cycle 5
Successive Communities
31. Needs constant energy source and cycling of materials between the living system
Saprophytes
Physical Environment-Sunlight
Conditions for stability in an Ecosystem
Nitrified
32. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Taiga Plants
Nekton
Biotic Environment
Nature of Biomes
33. Used to include only the population and not their physical environment
Aphotic Zone animals
Sere
Physical Environment-Temperature
Biotic Community
34. Adaptations for maintaining their internal osmolarity and conserving water
Competition
Osmoregulation
Benthos
Food Pyramids
35. Affect the type of vegetation that can be supported
Cohesive Force
Substratum-Minerals
Deep-sea Organisms
Food Web
36. Developed long legs and many are hoofed
Hydrosphere
Coimax Vegetatioin
Grassland Animals
Benthos
37. Distinct community in a geographic region
Biome
Ecology
Decomposer
Pyramid of Numbers
38. Includes climate - temperature - availability of light and water - and the local topology
Abiotic (Physical) Environment
Heterotrophs
Lithosphere
Obligatory
39. 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
Niche
Aphotic Zone animals
Secondary Consumers
Nitrogen Cycle 4
40. Links between oceans and land
Taiga Animals
Population
Polar Region
Marshes
41. The vegetation that becomes dominant and stable after years of evolutiionary development
Carbon Cycle 2
Pyramid of Energy
Physical Environment-Temperature
Coimax Vegetatioin
42. 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
Nitrogen Cycle 3
Tundra Biome
Photic Zone
Physical Environment-Temperature
43. Rivers - lakes - ponds - and marshes
Ecological Succession
Biome
Pyramid of Numbers
Freshwater Biomes
44. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Substratum (soil/rock)
Organism
Desert Plants
Autotrophs
45. The study of interactions between organisms and their environment
Grassland Biome
Ecology
Osmoregulation
Marine Biomes
46. 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
Nitrogen Cycle 5
Saprophytes
Ecosystem
Aphotic Zone
47. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Autotrophs
Producers
Carbon Cycle 3
Primary Consumers
48. Determines water holding capacity
Substratum-texture
Tropical Rain Forest Biome
Community
Taiga Animals
49. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Intraspecific Interactions
Nitrogen Cycle 3
Autotrophs
Marine Biomes
50. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Tropical Rain Forest Animals
Taiga Plants
Competition Same Niche 3
Intertidal Zone Population