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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 only plants or plant foods
Biotic Environment
Temperate Coniferous Forest Biome
Herbivores
Epiphytes
2. Recycle water - oxygen - and phosphorus
Carbon Cycle 3
Pyramid of Mass
Other Cycles
Polar Region
3. Because organisms at the upper levels of the food chain derive their food energy from organisms at lower levels - and because energy is lost from one level to the next - each level can support a successively smaller biomass
Littoral Zone Populations
Nitrified
Food Pyramids
Pyramid of Mass
4. One or both organisms can't survive without the other
Obligatory
Biosphere
Heterotrophs
Saprophytes
5. 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
Epiphytes
Dominant Species
Physical Environment-Temperature
Grassland Biome
6. Consists of populations of different plants and animal species interacting with each other in a given environment
Aphotic Zone
Ecosystem
Communities
Successive Communities
7. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Nitrogen Cycle 4
Taiga Plants
Thundra Animals
8. Used to include only the population and not their physical environment
Biotic Community
Physical Environment-Sunlight
Substratum (soil/rock)
Producers
9. Any group of similar organisms that are capable of reproducing
Heterotrophs
Species
Grassland Animals
Coimax Vegetatioin
10. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Food Pyramids
Obligatory
Rootlike holdfasts
Nekton
11. Conserve water actively
Food Chain
Secondary Consumers
Desert Plants
Biosphere
12. Only animal life and other heterotrophic life exists
Obligatory
Pyramid of Mass
Carbon Cycle 3
Aphotic Zone
13. 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
Carbon Cycle 3
Nitrogen
Primary Consumers
14. Community in an ecological succession is identified by a dominant species
Sere
Substratum-pH
Marine Biomes
Ecological Succession
15. Includes the community and the environment and usually all five kingdoms
Aphotic Zone
Ecosystem
Aquatic Biomes
Symbionts
16. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Intertidal Zone
Saprophytes
Rootlike holdfasts
Organism
17. Links between oceans and land
Substratum-texture
Nitrogen cycle 1
Nitrogen Cycle 4
Marshes
18. Determine by the amount of decaying plant and animal life in the soil
Food Web
Substratum-Humus
Food Pyramids
Aphotic Zone animals
19. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Deep-sea Organisms
Substratum (soil/rock)
Dentrified
Substratum-texture
20. Rock and soil surface
Community
Desert animals
Poikilothermic (Cold Blooded)
Lithosphere
21. The major component of the internal environment of all living things
Physical Environment- Water
Physical Environment-Temperature
Grassland Biome
Temperate Deciduous Forest Biome
22. Nekton and benthos - scavengers - and predators (fiercely competitive)
Aphotic Zone animals
Cohesive Force
Osmoregulation
Second Law of Thermodynamics
23. Animals that feed on secondary consumer
Substratum (soil/rock)
Tertiary Consumers
Community
Food Pyramids
24. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Photic Zone
Desert Plants
Hydrosphere
Deep-sea Organisms
25. Rivers - lakes - ponds - and marshes
Freshwater Biomes
Carbon Cycle 3
Food Chain
Pyramid of Numbers
26. Organisms that manufacture their own food
Population
Intertidal Zone Population
Autotrophs
Other Cycles
27. One that exerts control over the other species that are present
Taiga Plants
Biome
Predators
Dominant Species
28. Determines water holding capacity
Nitrogen Cycle 3
Lithosphere
Commensalism
Substratum-texture
29. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Material Cycles
Substratum-texture
Carnivores
Poikilothermic (Cold Blooded)
30. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Temperate Coniferous Plants
Littoral Zone Populations
Organism
Carbon Cycle 2
31. 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
Photic Zone animals
Producers
Climate and weather
Species
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
Biome
Pelagic Zone
Nitrogen cycle 1
Competition Same Niche 2
33. Includes climate - temperature - availability of light and water - and the local topology
Desert Biome
Abiotic (Physical) Environment
Aphotic Zone
Ecology
34. One species may be competitively superior to the other and drive the second to extinction
Grassland Animals
Carbon Cycle 1
Pyramid of Energy
Competition Same Niche
35. Distinct community in a geographic region
Hemeothermic (Warm Blooded)
Biome
Littoral Zone Populations
Osmoregulation
36. Polar bears - musk oxen - and arctic hens
Thundra Animals
Pyramid of Numbers
Competition
Carbon Cycle 2
37. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Second Law of Thermodynamics
Rootlike holdfasts
Communities
Predator-Prey relationship
38. Include saprophytic organisms and organisms of decay
Nitrogen Cycle 5
Substratum-pH
Decomposer
Nature of Biomes
39. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Nitrogen Cycle 5
Biosphere
Pelagic Zone
Epiphytes
40. The vegetation that becomes dominant and stable after years of evolutiionary development
Desert Plants
Temperate Deciduous Forest Animals
Species
Coimax Vegetatioin
41. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Biotic Environment
Temperate Deciduous Forest Biome
Marine Biomes
Cohesive Force
42. Lichens and moss
Pelagic Zone
Physical Environment-Temperature
Photic Zone animals
Tundra Plants
43. 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
Temperate Coniferous Forest Biome
Tropical Rain Forest Plants
Niche
Decomposer
44. 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
Biotic Community
Second Law of Thermodynamics
Cohesive Force
Littoral Zone
45. When a parasite benefits at the expense of the host
Organism
Rootlike holdfasts
Nature of Biomes
Parasitism
46. 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
Desert Plants
Physical Environment- Water
Material Cycles
Competition Same Niche 3
47. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Biotic Environment
Grassland Animals
Littoral Zone
Intraspecific Interactions
48. 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
Tundra Biome
Biosphere
Predator-Prey relationship
Lithosphere
49. Algae - crabs - crustacea - and many different species of fish
Littoral Zone Populations
Pyramid of Energy
Carbon Cycle 2
Taiga Biome
50. 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
Carbon Cycle 3
Nitrogen cycle 1
Competition Same Niche 2
Substratum (soil/rock)