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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. Affect the type of vegetation that can be supported
Substratum-Minerals
Tertiary Consumers
Pyramid of Energy
Carnivores
2. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Hypotonic
Climax Community
Food Chain
Sere
3. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Freshwater Biomes
Substratum-Minerals
Ecosystem
Nekton
4. The vegetation that becomes dominant and stable after years of evolutiionary development
Coimax Vegetatioin
Nitrogen
Producers
Communities
5. Lichens and moss
Secondary Consumers
Dentrified
Tundra Plants
Communities
6. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Tropical Rain Forest Biome
Symbionts
Grassland Animals
Tropical Rain Forest Plants
7. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Epiphytes
Environmental Factors
Tropical Rain Forest Biome
Temperate Deciduous Forest Animals
8. Nekton and benthos - scavengers - and predators (fiercely competitive)
Aphotic Zone animals
Biosphere
Nitrogen Cycle 4
Aphotic Zone
9. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Ecological Succession
Biotic Environment
Pyramid of Numbers
Marine Biomes
10. When a parasite benefits at the expense of the host
Grassland Biome
Marshes
Competition Same Niche 2
Parasitism
11. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Intertidal Zone
Aphotic Zone
Photic Zone
Freshwater Biomes
12. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Conditions for stability in an Ecosystem
Decomposer
Ecology
Intertidal Zone
13. Animals that consume green plants (herbivores)
Nitrogen Cycle 3
Nature of Biomes
Primary Consumers
Intertidal Zone Population
14. Includes the community and the environment and usually all five kingdoms
Hydrosphere
Carnivores
Substratum-Minerals
Ecosystem
15. Animals that feed on secondary consumer
Pioneer Organism
Tertiary Consumers
Pyramid of Mass
Biosphere
16. Without a constant input of energy from the sun - an ecosystem would soon run down - as food is transferred from one level of the food chain to the next - a transfer of energy occurs
Grassland Animals
Food Pyramids
Parasitism
Desert animals
17. One species may be competitively superior to the other and drive the second to extinction
Competition Same Niche
Obligatory
Tropical Rain Forest Biome
Aphotic Zone animals
18. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Hypotonic
Desert animals
Community
Mutualims
19. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Ecosystem
Climax Community
Population
Biotic Community
20. Composed of populations that are able to exist under the new conditions
Successive Communities
Taiga Plants
Physical Environment-Temperature
Substratum-pH
21. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Conditions for stability in an Ecosystem
Aphotic Zone
Nitrogen
Temperate Deciduous Forest Animals
22. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Intertidal Zone Population
Biotic Environment
Osmoregulation
Carnivores
23. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Pioneer Organism
Taiga Animals
Cohesive Force
Physical Environment-Temperature
24. Animals eat plants and use the digested nutrients to form carbohydrates - fats - and proteins characteristic of the species. a part of these organic compounds is used as fuel in respiration in plants and animals
Marshes
Carbon Cycle 2
Aphotic Zone animals
Littoral Zone
25. Recycle water - oxygen - and phosphorus
Mutualims
Scavengers
Pioneer Organism
Other Cycles
26. First to resettle a virgin area
Pioneer Organism
Aphotic Zone
Dentrified
Polar Region
27. The chief disruptive force
Competition
Taiga Animals
Autotrophs
Biotic Community
28. One that exerts control over the other species that are present
Species
Dominant Species
Substratum-Humus
Intertidal Zone Population
29. 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
Mutualims
Temperate Coniferous Forest Biome
Temperate Deciduous Forest Animals
Marshes
30. 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
Food Web
Second Law of Thermodynamics
Competition Same Niche 3
Secondary Consumers
31. Sunlit layer of the open sea extending to a depth of 250-600ft
Food Chain
Nitrified
Photic zone
Scavengers
32. Animals that consume primary consumers (carnivores)
Ecosystem
Herbivores
Aphotic Zone
Secondary Consumers
33. The ultimate source of energy for all organisms
Polar Region
Pioneer Organism
Carnivores
Physical Environment-Sunlight
34. 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
Substratum (soil/rock)
Primary Consumers
Omnivores
Niche
35. Polar bears - musk oxen - and arctic hens
Secondary Consumers
Nitrogen Cycle 5
Nitrogen Cycle 4
Thundra Animals
36. Regiong beneatht he photic zone that receives no light
Substratum-Minerals
Aphotic Zone
Substratum-Humus
Niche
37. 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
Community
Carbon Cycle 2
Hypotonic
Commensalism
38. 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
Saprophytes
Communities
Tropical Rain Forest Plants
Pyramid of Numbers
39. 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
Climax Community
Carbon Cycle 3
Polar Region
Lithosphere
40. Forest floors contain moss and lichens
Niche
Conditions for stability in an Ecosystem
Marshes
Taiga Plants
41. Free-living organisms that feed on other living organisms
Cohesive Force
Rootlike holdfasts
Predators
Taiga Animals
42. Determines the nature of plant and animal life in the soil
Substratum (soil/rock)
Climate and weather
Competition Same Niche 2
Tropical Rain Forest Biome
43. Includes climate - temperature - availability of light and water - and the local topology
Osmoregulation
Food Web
Abiotic (Physical) Environment
Temperate Coniferous Forest Biome
44. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Hemeothermic (Warm Blooded)
Rootlike holdfasts
Nitrified
Species
45. Rhododendrons and pines are more suited for growth in acid oil
Substratum-pH
Poikilothermic (Cold Blooded)
Other Cycles
Herbivores
46. Crawling and sessile organsms
Dominant Species
Competition Same Niche 3
Climax Community
Benthos
47. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Predator-Prey relationship
Nitrogen Cycle 5
Nitrogen Cycle 2
Producers
48. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Temperate Deciduous Forest Plants
Tundra Plants
Dentrified
Deep-sea Organisms
49. Links between oceans and land
Tropical Rain Forest Plants
Ecology
Carbon Cycle 3
Marshes
50. When one organism is benefited by the association and the other is not affected
Nitrogen Cycle 4
Commensalism
Pioneer Organism
Competition Same Niche 2