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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. 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
Ecosystem
Tertiary Consumers
Successive Communities
2. Consists of populations of different plants and animal species interacting with each other in a given environment
Communities
Ecosystem
Temperate Coniferous Plants
Material Cycles
3. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Benthos
Parasitism
Epiphytes
Substratum-Minerals
4. Free-living organisms that feed on other living organisms
Predators
Symbionts
Marine Biomes
Ecology
5. 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
Nitrogen Cycle 4
Aquatic Biomes
Taiga Animals
Nekton
6. Group of organisms of the same species living together in a given location
Grassland Animals
Population
Nitrogen
Ecology
7. 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
Polar Region
Desert Plants
Temperate Coniferous Forest Biome
Climate and weather
8. 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
Photic zone
Aquatic Biomes
Food Web
Physical Environment-Temperature
9. Animals that feed on secondary consumer
Tertiary Consumers
Physical Environment-Temperature
Polar Region
Photic Zone animals
10. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Substratum (soil/rock)
Nitrified
Dominant Species
Food Chain
11. The study of interactions between organisms and their environment
Desert Plants
Ecosystem
Cohesive Force
Ecology
12. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Biosphere
Littoral Zone
Intertidal Zone Population
Substratum-pH
13. 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
Competition Same Niche 2
Nitrogen Cycle 3
Thundra Animals
Tropical Rain Forest Plants
14. Affect the type of vegetation that can be supported
Producers
Substratum-Minerals
Competition
Second Law of Thermodynamics
15. Needs constant energy source and cycling of materials between the living system
Autotrophs
Competition Same Niche 3
Conditions for stability in an Ecosystem
Competition Same Niche 2
16. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Polar Region
Ecological Succession
Littoral Zone Populations
Taiga Biome
17. The oceans
Competition Same Niche
Hydrosphere
Predators
Nekton
18. Conserve water actively
Desert Plants
Photic zone
Temperate Coniferous Plants
Pelagic Zone
19. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Pyramid of Energy
Marine Biomes
Polar Region
Tropical Rain Forest Plants
20. Encompasses all that is external to the organism and is necessary for its existence
Environment
Photic zone
Climate and weather
Food Chain
21. When a parasite benefits at the expense of the host
Nitrogen Cycle 5
Parasitism
Coimax Vegetatioin
Producers
22. Animals that consume green plants (herbivores)
Primary Consumers
Nitrogen Cycle 5
Tropical Rain Forest Biome
Obligatory
23. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Parasitism
Tropical Rain Forest Plants
Physical Environment-Temperature
Deep-sea Organisms
24. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Competition Same Niche
Nitrogen Cycle 3
Autotrophs
Photic zone
25. Forest floors contain moss and lichens
Physical Environment-Temperature
Taiga Plants
Desert Biome
Competition Same Niche 2
26. Community in an ecological succession is identified by a dominant species
Rootlike holdfasts
Climate and weather
Sere
Decomposer
27. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Producers
Substratum (soil/rock)
Heterotrophs
Intertidal Zone
28. 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
Saprophytes
Coimax Vegetatioin
Nitrogen cycle 1
Competition Same Niche 3
29. The major component of the internal environment of all living things
Temperate Deciduous Forest Animals
Dominant Species
Cohesive Force
Physical Environment- Water
30. Developed long legs and many are hoofed
Desert animals
Grassland Animals
Poikilothermic (Cold Blooded)
Species
31. One or both organisms can't survive without the other
Substratum-texture
Taiga Biome
Obligatory
Dentrified
32. Rhododendrons and pines are more suited for growth in acid oil
Scavengers
Epiphytes
Symbionts
Substratum-pH
33. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Saprophytes
Dominant Species
Hemeothermic (Warm Blooded)
Pyramid of Numbers
34. Used to include only the population and not their physical environment
Nitrified
Rootlike holdfasts
Predator-Prey relationship
Biotic Community
35. 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
Deep-sea Organisms
Physical Environment- Water
Carbon Cycle 3
Predators
36. Adaptations for maintaining their internal osmolarity and conserving water
Carbon Cycle 3
Competition Same Niche
Osmoregulation
Tertiary Consumers
37. 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
Benthos
Niche
Carbon Cycle 3
Competition Same Niche
38. Any group of similar organisms that are capable of reproducing
Desert Biome
Species
Deep-sea Organisms
Food Web
39. Symbiotic relationship from which both organisms derive some benefit
Taiga Animals
Substratum-pH
Pyramid of Numbers
Mutualims
40. Integrated system of species that are dependent upon one another for survival
Pyramid of Energy
Pelagic Zone
Community
Photic Zone animals
41. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Carbon Cycle 2
Littoral Zone Populations
Nitrified
Physical Environment-Sunlight
42. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Dentrified
Epiphytes
Intertidal Zone
Substratum-pH
43. Include reproduction and protection from predators and destructive weather
Temperate Deciduous Forest Plants
Pyramid of Energy
Cohesive Force
Biotic Community
44. The vegetation that becomes dominant and stable after years of evolutiionary development
Coimax Vegetatioin
Nature of Biomes
Taiga Animals
Food Pyramids
45. Sunlit layer of the open sea extending to a depth of 250-600ft
Photic zone
Ecology
Freshwater Biomes
Substratum-texture
46. Includes the community and the environment and usually all five kingdoms
Ecosystem
Biosphere
Pioneer Organism
Biotic Community
47. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Pioneer Organism
Tropical Rain Forest Plants
Nekton
Thundra Animals
48. Recycle water - oxygen - and phosphorus
Nature of Biomes
Carbon Cycle 3
Nekton
Other Cycles
49. 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
Competition Same Niche 2
Hypotonic
Nature of Biomes
Freshwater Biomes
50. Freshwater Biomes vs. Saltwater 2: In rivers and streams - strong swift currents exist - and thus fish that have developed strong muscles and plants with _____________ have survived
Carbon Cycle 1
Other Cycles
Rootlike holdfasts
Hydrosphere