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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. Needs constant energy source and cycling of materials between the living system
Conditions for stability in an Ecosystem
Successive Communities
Pelagic Zone
Organism
2. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Carbon Cycle 1
Temperate Deciduous Forest Biome
Decomposer
Cohesive Force
3. 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
Nitrogen
Tundra Biome
Carbon Cycle 3
Temperate Deciduous Forest Animals
4. 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
Community
Nitrogen Cycle 2
Marine Biomes
Competition Same Niche 3
5. Animals that consume green plants (herbivores)
Primary Consumers
Second Law of Thermodynamics
Biotic Community
Tertiary Consumers
6. Forest floors contain moss and lichens
Taiga Plants
Littoral Zone Populations
Intertidal Zone
Tundra Plants
7. Includes the community and the environment and usually all five kingdoms
Ecosystem
Predator-Prey relationship
Hydrosphere
Pioneer Organism
8. Include saprophytic organisms and organisms of decay
Polar Region
Successive Communities
Decomposer
Nekton
9. Sunlit layer of the open sea extending to a depth of 250-600ft
Temperate Coniferous Plants
Photic zone
Primary Consumers
Secondary Consumers
10. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Cohesive Force
Thundra Animals
Tropical Rain Forest Biome
Nitrogen
11. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Tertiary Consumers
Nitrogen Cycle 4
Other Cycles
Hemeothermic (Warm Blooded)
12. 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
Ecological Succession
Nitrogen Cycle 2
Taiga Animals
13. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Osmoregulation
Tropical Rain Forest Biome
Nekton
Deep-sea Organisms
14. Animals that feed on secondary consumer
Substratum-pH
Tertiary Consumers
Species
Obligatory
15. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Community
Predators
Producers
Freshwater Biomes
16. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Nekton
Predator-Prey relationship
Nature of Biomes
Predators
17. When a parasite benefits at the expense of the host
Photic Zone
Parasitism
Intertidal Zone
Successive Communities
18. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Predators
Climax Community
Hydrosphere
Tertiary Consumers
19. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Coimax Vegetatioin
Autotrophs
Environmental Factors
Food Pyramids
20. Used to include only the population and not their physical environment
Carnivores
Decomposer
Biotic Community
Marshes
21. Links between oceans and land
Aphotic Zone
Pyramid of Numbers
Food Pyramids
Marshes
22. One or both organisms can't survive without the other
Organism
Freshwater Biomes
Tertiary Consumers
Obligatory
23. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Deep-sea Organisms
Desert Biome
Scavengers
Nitrified
24. 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
Photic Zone animals
Decomposer
Climate and weather
Taiga Biome
25. Integrated system of species that are dependent upon one another for survival
Hypotonic
Community
Organism
Dentrified
26. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Epiphytes
Thundra Animals
Nitrogen Cycle 2
Physical Environment-Temperature
27. When one organism is benefited by the association and the other is not affected
Biotic Environment
Substratum-pH
Commensalism
Nitrogen Cycle 3
28. The oceans
Poikilothermic (Cold Blooded)
Competition Same Niche
Hydrosphere
Predators
29. 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
Hypotonic
Biotic Community
Grassland Biome
Taiga Plants
30. 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
Lithosphere
Autotrophs
Biotic Community
31. Regiong beneatht he photic zone that receives no light
Nitrogen Cycle 4
Substratum (soil/rock)
Aphotic Zone
Heterotrophs
32. 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
Species
Physical Environment-Sunlight
Tundra Biome
Polar Region
33. The vegetation that becomes dominant and stable after years of evolutiionary development
Polar Region
Rootlike holdfasts
Pyramid of Energy
Coimax Vegetatioin
34. 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
Substratum-Minerals
Carnivores
Nitrogen Cycle 3
Competition Same Niche
35. Determine by the amount of decaying plant and animal life in the soil
Substratum-Humus
Aphotic Zone animals
Substratum-pH
Desert Plants
36. Only animal life and other heterotrophic life exists
Biosphere
Competition Same Niche 2
Aphotic Zone
Biotic Environment
37. Free-living organisms that feed on other living organisms
Littoral Zone Populations
Predators
Climax Community
Lithosphere
38. 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
Taiga Biome
Communities
Coimax Vegetatioin
39. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Competition Same Niche 2
Intertidal Zone Population
Predators
Predator-Prey relationship
40. 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
Nekton
Autotrophs
Biome
Temperate Coniferous Forest Biome
41. 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
Carbon Cycle 1
Desert animals
Pyramid of Mass
Substratum-Minerals
42. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Second Law of Thermodynamics
Tropical Rain Forest Animals
Physical Environment-Temperature
Environmental Factors
43. Affect the type of vegetation that can be supported
Substratum-Minerals
Pyramid of Energy
Temperate Coniferous Plants
Thundra Animals
44. Polar bears - musk oxen - and arctic hens
Thundra Animals
Community
Osmoregulation
Substratum-pH
45. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Desert animals
Grassland Animals
Temperate Deciduous Forest Plants
Scavengers
46. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Mutualims
Intertidal Zone
Carnivores
Food Web
47. Lichens and moss
Benthos
Tundra Plants
Temperate Coniferous Plants
Second Law of Thermodynamics
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
Tropical Rain Forest Biome
Aquatic Biomes
Competition Same Niche 2
Carnivores
49. One that exerts control over the other species that are present
Epiphytes
Predator-Prey relationship
Temperate Deciduous Forest Plants
Dominant Species
50. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Nekton
Taiga Biome
Nitrogen cycle 1
Photic Zone animals