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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. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Freshwater Biomes
Taiga Biome
Producers
Littoral Zone
2. Affect the type of vegetation that can be supported
Pyramid of Numbers
Environmental Factors
Tropical Rain Forest Animals
Substratum-Minerals
3. Composed of populations that are able to exist under the new conditions
Environment
Aphotic Zone animals
Tundra Biome
Successive Communities
4. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Autotrophs
Cohesive Force
Nitrogen
Littoral Zone
5. Free-living organisms that feed on other living organisms
Grassland Biome
Other Cycles
Competition Same Niche 3
Predators
6. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Food Chain
Saprophytes
Carnivores
Temperate Deciduous Forest Plants
7. 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
Hypotonic
Food Web
Taiga Biome
Nitrogen Cycle 4
8. Consists of populations of different plants and animal species interacting with each other in a given environment
Communities
Osmoregulation
Substratum-Minerals
Pyramid of Energy
9. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Littoral Zone
Environmental Factors
Thundra Animals
Abiotic (Physical) Environment
10. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Food Web
Symbionts
Substratum-Humus
Littoral Zone
11. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Climax Community
Lithosphere
Physical Environment-Sunlight
Climate and weather
12. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Hemeothermic (Warm Blooded)
Polar Region
Temperate Coniferous Plants
Littoral Zone
13. 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
Hydrosphere
Primary Consumers
Symbionts
Competition Same Niche 3
14. Includes climate - temperature - availability of light and water - and the local topology
Tropical Rain Forest Animals
Food Web
Abiotic (Physical) Environment
Predator-Prey relationship
15. Determined by the same decisive factors-temperatures and rainfall
Ecology
Desert Plants
Second Law of Thermodynamics
Nature of Biomes
16. Rivers - lakes - ponds - and marshes
Decomposer
Parasitism
Freshwater Biomes
Predators
17. Developed long legs and many are hoofed
Marshes
Grassland Animals
Physical Environment-Sunlight
Osmoregulation
18. 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
Substratum-pH
Conditions for stability in an Ecosystem
Rootlike holdfasts
Photic Zone animals
19. Used to include only the population and not their physical environment
Biotic Community
Photic Zone animals
Nitrogen Cycle 3
Substratum-texture
20. Animals that feed on secondary consumer
Tertiary Consumers
Physical Environment- Water
Physical Environment-Sunlight
Grassland Biome
21. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Epiphytes
Littoral Zone
Nitrogen Cycle 4
Physical Environment-Sunlight
22. The major component of the internal environment of all living things
Physical Environment- Water
Benthos
Polar Region
Food Web
23. 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
Nitrogen Cycle 4
Carbon Cycle 2
Niche
Commensalism
24. Conserve water actively
Decomposer
Desert Plants
Tundra Plants
Taiga Biome
25. 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
Deep-sea Organisms
Aquatic Biomes
Abiotic (Physical) Environment
Substratum (soil/rock)
26. 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
Hydrosphere
Lithosphere
Photic zone
27. Individuals belonging to the same species use the same resources and if a particular resource is limited - then these organisms must compete with one another
Coimax Vegetatioin
Intraspecific Interactions
Obligatory
Biotic Community
28. Integrated system of species that are dependent upon one another for survival
Community
Marine Biomes
Freshwater Biomes
Poikilothermic (Cold Blooded)
29. Recycle water - oxygen - and phosphorus
Other Cycles
Aphotic Zone
Parasitism
Freshwater Biomes
30. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Second Law of Thermodynamics
Nitrogen Cycle 3
Intertidal Zone
Nekton
31. Links between oceans and land
Nitrogen Cycle 4
Coimax Vegetatioin
Marshes
Substratum-Humus
32. Rhododendrons and pines are more suited for growth in acid oil
Polar Region
Nitrogen Cycle 2
Substratum-pH
Ecosystem
33. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Pyramid of Mass
Carbon Cycle 1
Temperate Deciduous Forest Plants
Competition Same Niche 2
34. Encompasses all that is external to the organism and is necessary for its existence
Dominant Species
Nitrogen
Environment
Decomposer
35. Distinct community in a geographic region
Species
Biome
Ecological Succession
Nitrified
36. 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
Tundra Biome
Taiga Animals
Nitrogen Cycle 5
Pyramid of Energy
37. 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
Temperate Deciduous Forest Plants
Polar Region
Grassland Biome
Nitrogen Cycle 3
38. One species may be competitively superior to the other and drive the second to extinction
Physical Environment-Sunlight
Successive Communities
Competition Same Niche
Communities
39. Animals that consume primary consumers (carnivores)
Environment
Carbon Cycle 1
Secondary Consumers
Ecosystem
40. Food chain is not a simple linear chain but an intricate web
Carbon Cycle 1
Primary Consumers
Nature of Biomes
Food Web
41. Animals that consume only plants or plant foods
Food Web
Hydrosphere
Herbivores
Heterotrophs
42. When one organism is benefited by the association and the other is not affected
Commensalism
Intraspecific Interactions
Temperate Coniferous Forest Biome
Pyramid of Numbers
43. Animals that eat both plants and animals
Primary Consumers
Omnivores
Lithosphere
Tropical Rain Forest Animals
44. Nekton and benthos - scavengers - and predators (fiercely competitive)
Food Pyramids
Aphotic Zone
Omnivores
Aphotic Zone animals
45. Group of organisms of the same species living together in a given location
Grassland Biome
Sere
Population
Producers
46. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Aphotic Zone
Taiga Biome
Tropical Rain Forest Animals
Nitrogen
47. 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
Omnivores
Population
Photic Zone animals
Pyramid of Mass
48. 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 Cycle 4
Substratum (soil/rock)
Carbon Cycle 3
Nitrogen Cycle 5
49. Includes the community and the environment and usually all five kingdoms
Second Law of Thermodynamics
Physical Environment-Sunlight
Photic Zone animals
Ecosystem
50. When a parasite benefits at the expense of the host
Polar Region
Benthos
Parasitism
Grassland Biome