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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. Include saprophytic organisms and organisms of decay
Species
Predator-Prey relationship
Decomposer
Carbon Cycle 3
2. Free-living organisms that feed on other living organisms
Marshes
Pioneer Organism
Taiga Plants
Predators
3. The oceans
Hydrosphere
Ecological Succession
Secondary Consumers
Freshwater Biomes
4. 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
Cohesive Force
Nitrogen Cycle 4
Physical Environment- Water
Tundra Biome
5. Composed of populations that are able to exist under the new conditions
Taiga Plants
Successive Communities
Biome
Substratum-Humus
6. Nekton and benthos - scavengers - and predators (fiercely competitive)
Aphotic Zone animals
Rootlike holdfasts
Aphotic Zone
Temperate Deciduous Forest Biome
7. Animals that eat both plants and animals
Omnivores
Desert Plants
Competition Same Niche
Environmental Factors
8. 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
Desert Biome
Grassland Animals
Omnivores
Decomposer
9. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Second Law of Thermodynamics
Aphotic Zone
Aphotic Zone
Temperate Deciduous Forest Plants
10. 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
Pyramid of Mass
Aphotic Zone
Osmoregulation
11. Links between oceans and land
Marshes
Tertiary Consumers
Parasitism
Polar Region
12. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Nitrogen Cycle 4
Lithosphere
Poikilothermic (Cold Blooded)
Temperate Deciduous Forest Plants
13. Determines water holding capacity
Tundra Biome
Substratum-texture
Communities
Community
14. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Marine Biomes
Temperate Coniferous Plants
Polar Region
Abiotic (Physical) Environment
15. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Nitrified
Food Web
Ecological Succession
Community
16. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Predators
Taiga Plants
Ecological Succession
Biosphere
17. The major component of the internal environment of all living things
Intertidal Zone Population
Substratum-Humus
Physical Environment- Water
Hydrosphere
18. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Successive Communities
Taiga Biome
Environmental Factors
Community
19. Group of organisms of the same species living together in a given location
Population
Pyramid of Energy
Tundra Biome
Commensalism
20. Region typical of the open seas and can be divided into photic and aphotic zones
Pelagic Zone
Substratum-Minerals
Tropical Rain Forest Plants
Benthos
21. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Littoral Zone Populations
Symbionts
Marshes
Nekton
22. 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
Temperate Deciduous Forest Plants
Conditions for stability in an Ecosystem
Saprophytes
Biosphere
23. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Tertiary Consumers
Polar Region
Predator-Prey relationship
Cohesive Force
24. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Temperate Deciduous Forest Biome
Nitrogen Cycle 2
Scavengers
Herbivores
25. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Pioneer Organism
Marine Biomes
Epiphytes
Photic zone
26. 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 Energy
Climate and weather
Material Cycles
Pyramid of Mass
27. Rock and soil surface
Tertiary Consumers
Lithosphere
Autotrophs
Carnivores
28. Organisms that manufacture their own food
Autotrophs
Saprophytes
Aphotic Zone
Tertiary Consumers
29. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Heterotrophs
Nitrogen Cycle 3
Marshes
Dentrified
30. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Ecosystem
Photic Zone
Climax Community
Freshwater Biomes
31. Rivers - lakes - ponds - and marshes
Freshwater Biomes
Carbon Cycle 3
Marine Biomes
Aquatic Biomes
32. Lichens and moss
Intraspecific Interactions
Temperate Coniferous Plants
Tundra Plants
Cohesive Force
33. The study of interactions between organisms and their environment
Temperate Deciduous Forest Plants
Commensalism
Nature of Biomes
Ecology
34. 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
Deep-sea Organisms
Competition Same Niche 3
Ecosystem
Biotic Environment
35. Rhododendrons and pines are more suited for growth in acid oil
Deep-sea Organisms
Substratum-pH
Competition
Photic Zone
36. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Nitrogen
Conditions for stability in an Ecosystem
Tropical Rain Forest Biome
Parasitism
37. Any group of similar organisms that are capable of reproducing
Species
Pyramid of Mass
Intraspecific Interactions
Symbionts
38. Includes climate - temperature - availability of light and water - and the local topology
Nitrogen Cycle 5
Taiga Plants
Tropical Rain Forest Animals
Abiotic (Physical) Environment
39. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Mutualims
Tropical Rain Forest Biome
Food Chain
Temperate Deciduous Forest Biome
40. 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
Tropical Rain Forest Plants
Climate and weather
Intraspecific Interactions
Dentrified
41. Includes the community and the environment and usually all five kingdoms
Ecosystem
Food Web
Competition Same Niche 3
Polar Region
42. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Food Pyramids
Successive Communities
Climax Community
Climate and weather
43. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Saprophytes
Biotic Environment
Marine Biomes
Other Cycles
44. 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
Second Law of Thermodynamics
Tropical Rain Forest Plants
Pyramid of Mass
45. One or both organisms can't survive without the other
Ecosystem
Obligatory
Carbon Cycle 2
Pelagic Zone
46. 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
Conditions for stability in an Ecosystem
Successive Communities
Biosphere
Rootlike holdfasts
47. When one organism is benefited by the association and the other is not affected
Conditions for stability in an Ecosystem
Thundra Animals
Physical Environment-Sunlight
Commensalism
48. Sunlit layer of the open sea extending to a depth of 250-600ft
Climate and weather
Saprophytes
Photic zone
Substratum (soil/rock)
49. Two fates await the ammonia (NH3). some are nitrified or dentrified
Scavengers
Cohesive Force
Dentrified
Nitrogen Cycle 5
50. 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
Carbon Cycle 3
Heterotrophs
Benthos
Pyramid of Energy