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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. Nekton and benthos - scavengers - and predators (fiercely competitive)
Omnivores
Competition Same Niche 3
Communities
Aphotic Zone animals
2. When one organism is benefited by the association and the other is not affected
Commensalism
Scavengers
Environmental Factors
Littoral Zone
3. 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
Tropical Rain Forest Plants
Symbionts
Intraspecific Interactions
Population
4. Includes the community and the environment and usually all five kingdoms
Climax Community
Marine Biomes
Physical Environment-Temperature
Ecosystem
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
Heterotrophs
Grassland Biome
Producers
Substratum-pH
6. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Competition Same Niche 2
Biome
Nitrified
Tropical Rain Forest Plants
7. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Nitrogen Cycle 4
Saprophytes
Epiphytes
Lithosphere
8. Encompasses all that is external to the organism and is necessary for its existence
Photic zone
Temperate Deciduous Forest Plants
Carbon Cycle 1
Environment
9. Sunlit layer of the open sea extending to a depth of 250-600ft
Pyramid of Energy
Benthos
Carbon Cycle 1
Photic zone
10. Receive less than ten inches of rain each year; the rain is concentrated within a few heavy cloudbursts -ex: Sahara in Africa and Gobi in Asia
Tropical Rain Forest Biome
Desert Plants
Desert Biome
Nitrogen Cycle 5
11. Animals that consume green plants (herbivores)
Dentrified
Primary Consumers
Temperate Coniferous Forest Biome
Species
12. 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
Marshes
Photic Zone
Ecological Succession
Food Pyramids
13. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Pelagic Zone
Tropical Rain Forest Animals
Biotic Environment
Material Cycles
14. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Desert Biome
Climax Community
Freshwater Biomes
Predator-Prey relationship
15. 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
Scavengers
Omnivores
Pyramid of Mass
Species
16. Animals that consume dead animals
Pyramid of Energy
Scavengers
Poikilothermic (Cold Blooded)
Deep-sea Organisms
17. Rivers - lakes - ponds - and marshes
Taiga Biome
Second Law of Thermodynamics
Other Cycles
Freshwater Biomes
18. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Competition Same Niche 3
Ecosystem
Saprophytes
Polar Region
19. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Ecosystem
Taiga Plants
Biotic Environment
Aphotic Zone
20. Determined by the same decisive factors-temperatures and rainfall
Dentrified
Littoral Zone Populations
Nature of Biomes
Physical Environment- Water
21. 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
Freshwater Biomes
Intertidal Zone Population
Cohesive Force
22. Polar bears - musk oxen - and arctic hens
Hemeothermic (Warm Blooded)
Aquatic Biomes
Thundra Animals
Tertiary Consumers
23. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Physical Environment-Temperature
Intertidal Zone
Photic Zone animals
Hemeothermic (Warm Blooded)
24. Developed long legs and many are hoofed
Grassland Animals
Climax Community
Food Pyramids
Aphotic Zone
25. Free-living organisms that feed on other living organisms
Polar Region
Predators
Competition Same Niche 2
Food Chain
26. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Rootlike holdfasts
Coimax Vegetatioin
Symbionts
Aphotic Zone
27. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Aphotic Zone
Intertidal Zone Population
Heterotrophs
Rootlike holdfasts
28. Links between oceans and land
Marshes
Herbivores
Physical Environment-Temperature
Abiotic (Physical) Environment
29. Needs constant energy source and cycling of materials between the living system
Nitrogen Cycle 3
Taiga Animals
Conditions for stability in an Ecosystem
Desert Plants
30. 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
Successive Communities
Pyramid of Energy
Predator-Prey relationship
Symbionts
31. Food chain is not a simple linear chain but an intricate web
Food Web
Marine Biomes
Competition Same Niche 3
Carnivores
32. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Substratum (soil/rock)
Taiga Biome
Nitrogen Cycle 3
Material Cycles
33. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Osmoregulation
Temperate Coniferous Plants
Marine Biomes
Competition
34. Includes climate - temperature - availability of light and water - and the local topology
Biotic Environment
Abiotic (Physical) Environment
Carbon Cycle 1
Species
35. Algae - crabs - crustacea - and many different species of fish
Tundra Biome
Littoral Zone Populations
Carbon Cycle 2
Lithosphere
36. Deer - fox - woodchuck - and squirrel
Temperate Deciduous Forest Animals
Ecology
Tropical Rain Forest Plants
Marine Biomes
37. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Tundra Plants
Competition Same Niche 3
Photic Zone
Decomposer
38. First to resettle a virgin area
Food Chain
Lithosphere
Pioneer Organism
Taiga Biome
39. The oceans
Coimax Vegetatioin
Hydrosphere
Temperate Coniferous Forest Biome
Food Pyramids
40. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Grassland Biome
Intertidal Zone
Species
Pyramid of Numbers
41. Receive less rainfall than the temperate forests - have long - cold winters - and are inhabited by single coniferous tree-the spruce -extreme northern parts of Canada and Russia
Aquatic Biomes
Taiga Biome
Marine Biomes
Temperate Deciduous Forest Animals
42. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Temperate Deciduous Forest Biome
Marshes
Carnivores
Temperate Deciduous Forest Animals
43. The major component of the internal environment of all living things
Physical Environment- Water
Secondary Consumers
Biotic Community
Aquatic Biomes
44. 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
Autotrophs
Tropical Rain Forest Plants
Temperate Deciduous Forest Plants
Carbon Cycle 3
45. When a parasite benefits at the expense of the host
Tundra Plants
Parasitism
Dentrified
Littoral Zone
46. Group of organisms of the same species living together in a given location
Biotic Environment
Herbivores
Population
Obligatory
47. Distinct community in a geographic region
Conditions for stability in an Ecosystem
Nitrogen Cycle 4
Cohesive Force
Biome
48. More than 70% of earth -plants have little controlling influence in communities -most stable ecosystems; the conditions affecting temperature - amount of available oxygen and cabon dioxide - and amount of suspended or dissolve materials are very stab
Niche
Aquatic Biomes
Environmental Factors
Carbon Cycle 3
49. Regiong beneatht he photic zone that receives no light
Predators
Saprophytes
Population
Aphotic Zone
50. Conserve water actively
Community
Physical Environment-Sunlight
Desert Plants
Osmoregulation