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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. Includes the community and the environment and usually all five kingdoms
Conditions for stability in an Ecosystem
Nitrogen cycle 1
Physical Environment-Sunlight
Ecosystem
2. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Photic Zone animals
Polar Region
Competition
Grassland Biome
3. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Dominant Species
Heterotrophs
Climax Community
Carnivores
4. Animals that consume primary consumers (carnivores)
Secondary Consumers
Nitrogen Cycle 3
Nitrogen Cycle 5
Substratum (soil/rock)
5. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Desert animals
Temperate Coniferous Forest Biome
Organism
Competition
6. Include saprophytic organisms and organisms of decay
Littoral Zone
Decomposer
Poikilothermic (Cold Blooded)
Dentrified
7. The ultimate source of energy for all organisms
Scavengers
Tundra Biome
Temperate Coniferous Plants
Physical Environment-Sunlight
8. Polar bears - musk oxen - and arctic hens
Thundra Animals
Deep-sea Organisms
Substratum-texture
Species
9. Distinct community in a geographic region
Polar Region
Commensalism
Biome
Substratum-Humus
10. One or both organisms can't survive without the other
Material Cycles
Obligatory
Desert Plants
Osmoregulation
11. 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
Substratum (soil/rock)
Grassland Biome
Autotrophs
Conditions for stability in an Ecosystem
12. Only animal life and other heterotrophic life exists
Carbon Cycle 3
Photic zone
Autotrophs
Aphotic Zone
13. Determines the nature of plant and animal life in the soil
Nitrogen
Aquatic Biomes
Substratum (soil/rock)
Decomposer
14. 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
Pyramid of Mass
Tropical Rain Forest Biome
Aquatic Biomes
Substratum (soil/rock)
15. 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
Substratum-pH
Nitrogen Cycle 4
Sere
Other Cycles
16. Lichens and moss
Obligatory
Omnivores
Osmoregulation
Tundra Plants
17. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Heterotrophs
Marshes
Desert Plants
Thundra Animals
18. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Intertidal Zone
Poikilothermic (Cold Blooded)
Biosphere
Nekton
19. The vegetation that becomes dominant and stable after years of evolutiionary development
Sere
Dentrified
Pyramid of Energy
Coimax Vegetatioin
20. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Omnivores
Photic Zone animals
Taiga Biome
21. Animals that consume only plants or plant foods
Intertidal Zone
Food Chain
Symbionts
Herbivores
22. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Desert animals
Primary Consumers
Nitrogen Cycle 3
Nitrified
23. Rhododendrons and pines are more suited for growth in acid oil
Aphotic Zone
Substratum-pH
Biosphere
Producers
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
Carbon Cycle 1
Niche
Pyramid of Energy
Communities
25. Rock and soil surface
Environment
Food Chain
Cohesive Force
Lithosphere
26. 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
Predator-Prey relationship
Nitrogen cycle 1
Aquatic Biomes
Aphotic Zone
27. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Dentrified
Lithosphere
Abiotic (Physical) Environment
Saprophytes
28. Animals that feed on secondary consumer
Tertiary Consumers
Obligatory
Species
Tropical Rain Forest Animals
29. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Osmoregulation
Competition Same Niche
Desert animals
Food Pyramids
30. Integrated system of species that are dependent upon one another for survival
Coimax Vegetatioin
Omnivores
Community
Biotic Environment
31. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Substratum (soil/rock)
Carbon Cycle 3
Producers
Biosphere
32. The oceans
Hydrosphere
Temperate Deciduous Forest Plants
Food Chain
Nitrogen Cycle 3
33. Links between oceans and land
Marshes
Parasitism
Successive Communities
Competition Same Niche 3
34. Deer - fox - woodchuck - and squirrel
Physical Environment-Temperature
Tropical Rain Forest Animals
Intertidal Zone
Temperate Deciduous Forest Animals
35. Animals eat plants and use the digested nutrients to form carbohydrates - fats - and proteins characteristic of the species. a part of these organic compounds is used as fuel in respiration in plants and animals
Material Cycles
Taiga Animals
Carbon Cycle 2
Deep-sea Organisms
36. Animals that consume green plants (herbivores)
Community
Desert Plants
Primary Consumers
Taiga Biome
37. Include reproduction and protection from predators and destructive weather
Cohesive Force
Intertidal Zone
Desert Plants
Coimax Vegetatioin
38. When one organism is benefited by the association and the other is not affected
Food Pyramids
Commensalism
Substratum-pH
Benthos
39. 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
Commensalism
Competition Same Niche 3
Nitrogen
Marshes
40. Group of organisms of the same species living together in a given location
Population
Grassland Biome
Deep-sea Organisms
Nekton
41. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Symbionts
Competition Same Niche 2
Other Cycles
Epiphytes
42. 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
Marshes
Temperate Coniferous Forest Biome
Photic Zone animals
43. 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
Marshes
Other Cycles
Ecology
Climate and weather
44. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Tundra Plants
Aphotic Zone
Pyramid of Numbers
Nitrified
45. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Carnivores
Marine Biomes
Intertidal Zone Population
Material Cycles
46. Symbiotic relationship from which both organisms derive some benefit
Intertidal Zone Population
Desert animals
Mutualims
Pyramid of Mass
47. The study of interactions between organisms and their environment
Ecology
Omnivores
Herbivores
Nekton
48. First to resettle a virgin area
Carnivores
Nitrified
Pyramid of Energy
Pioneer Organism
49. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Autotrophs
Hemeothermic (Warm Blooded)
Photic Zone animals
Taiga Plants
50. 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
Substratum-Humus
Cohesive Force
Substratum (soil/rock)
Saprophytes