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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. Encompasses all that is external to the organism and is necessary for its existence
Pioneer Organism
Littoral Zone
Environment
Tertiary Consumers
2. Determined by the same decisive factors-temperatures and rainfall
Competition Same Niche 2
Successive Communities
Pyramid of Numbers
Nature of Biomes
3. 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
Nitrogen cycle 1
Carnivores
Competition Same Niche 3
Pyramid of Energy
4. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Nitrogen Cycle 3
Polar Region
Climate and weather
Biotic Community
5. Group of organisms of the same species living together in a given location
Poikilothermic (Cold Blooded)
Aphotic Zone animals
Population
Littoral Zone
6. Recycle water - oxygen - and phosphorus
Dentrified
Substratum-Minerals
Other Cycles
Omnivores
7. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Tundra Plants
Desert animals
Temperate Deciduous Forest Plants
Substratum-Minerals
8. Rivers - lakes - ponds - and marshes
Substratum-Minerals
Climate and weather
Tropical Rain Forest Animals
Freshwater Biomes
9. Determines the nature of plant and animal life in the soil
Substratum (soil/rock)
Successive Communities
Competition Same Niche 2
Conditions for stability in an Ecosystem
10. Links between oceans and land
Marshes
Ecological Succession
Symbionts
Photic zone
11. Affect the type of vegetation that can be supported
Nitrogen
Substratum-Minerals
Producers
Scavengers
12. Symbiotic relationship from which both organisms derive some benefit
Communities
Grassland Animals
Commensalism
Mutualims
13. Distinct community in a geographic region
Competition Same Niche 3
Biome
Predator-Prey relationship
Biotic Environment
14. Forest floors contain moss and lichens
Taiga Plants
Second Law of Thermodynamics
Producers
Aphotic Zone
15. 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
Ecological Succession
Competition Same Niche 3
Biotic Environment
Carbon Cycle 1
16. The major component of the internal environment of all living things
Substratum-Humus
Temperate Deciduous Forest Animals
Physical Environment- Water
Parasitism
17. 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
Physical Environment-Temperature
Substratum-Minerals
Nitrogen Cycle 3
Niche
18. Include reproduction and protection from predators and destructive weather
Epiphytes
Grassland Animals
Cohesive Force
Producers
19. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Littoral Zone
Physical Environment-Sunlight
Tundra Plants
Substratum-Minerals
20. Animals that only eat other animals -possess pointed teeth and fang-like canine teeth for tearing flesh -have shorter digestive tracts because the easier digestibility of animal food
Carnivores
Temperate Deciduous Forest Plants
Lithosphere
Competition Same Niche
21. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Obligatory
Freshwater Biomes
Symbionts
Competition Same Niche 2
22. The vegetation that becomes dominant and stable after years of evolutiionary development
Coimax Vegetatioin
Biosphere
Physical Environment-Sunlight
Epiphytes
23. Animals that eat both plants and animals
Species
Omnivores
Epiphytes
Food Chain
24. Freshwater Biomes vs. Saltwater 1: Freshwater is _______________ which results in the passage of water into the cell. Freshwater organisms have homeostatic mechanisms to maintain water balance by the regular removal of the excess water. these include
Tertiary Consumers
Pioneer Organism
Hypotonic
Secondary Consumers
25. The ultimate source of energy for all organisms
Desert Biome
Nitrogen Cycle 3
Carbon Cycle 1
Physical Environment-Sunlight
26. Includes climate - temperature - availability of light and water - and the local topology
Food Pyramids
Abiotic (Physical) Environment
Omnivores
Carbon Cycle 3
27. 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
Temperate Deciduous Forest Plants
Carbon Cycle 1
Nekton
Food Web
28. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Competition Same Niche 2
Photic Zone
Substratum (soil/rock)
Intertidal Zone Population
29. Determines water holding capacity
Substratum-texture
Nitrogen Cycle 3
Intertidal Zone Population
Tundra Biome
30. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Predator-Prey relationship
Producers
Temperate Deciduous Forest Biome
Marine Biomes
31. When one organism is benefited by the association and the other is not affected
Carbon Cycle 3
Dominant Species
Carbon Cycle 2
Commensalism
32. Lichens and moss
Material Cycles
Climate and weather
Tropical Rain Forest Plants
Tundra Plants
33. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Climax Community
Competition
Polar Region
34. 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
Grassland Animals
Biotic Community
Aquatic Biomes
Aphotic Zone
35. Include saprophytic organisms and organisms of decay
Dentrified
Mutualims
Carnivores
Decomposer
36. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Carbon Cycle 3
Pioneer Organism
Producers
Polar Region
37. Integrated system of species that are dependent upon one another for survival
Desert Plants
Nitrogen
Community
Temperate Coniferous Plants
38. Used to include only the population and not their physical environment
Commensalism
Carbon Cycle 1
Biotic Community
Nitrogen cycle 1
39. Nekton and benthos - scavengers - and predators (fiercely competitive)
Predators
Aphotic Zone animals
Tropical Rain Forest Biome
Temperate Coniferous Plants
40. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Pyramid of Mass
Material Cycles
Temperate Coniferous Plants
Photic Zone animals
41. Food chain is not a simple linear chain but an intricate web
Conditions for stability in an Ecosystem
Population
Nitrogen Cycle 3
Food Web
42. Composed of populations that are able to exist under the new conditions
Successive Communities
Food Pyramids
Climate and weather
Desert Biome
43. Developed long legs and many are hoofed
Ecology
Hemeothermic (Warm Blooded)
Nitrogen Cycle 3
Grassland Animals
44. The chief disruptive force
Nekton
Competition
Osmoregulation
Food Pyramids
45. 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
Benthos
Substratum (soil/rock)
Grassland Biome
Nitrogen Cycle 3
46. Any group of similar organisms that are capable of reproducing
Cohesive Force
Intraspecific Interactions
Species
Competition
47. Includes the community and the environment and usually all five kingdoms
Ecosystem
Decomposer
Grassland Animals
Niche
48. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Biotic Community
Photic Zone
Nekton
Taiga Biome
49. 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 (soil/rock)
Niche
Nitrogen Cycle 4
Deep-sea Organisms
50. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Ecology
Intertidal Zone
Population
Competition Same Niche 2