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Test your basic knowledge |
PCAT Biology Ecology
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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. First to resettle a virgin area
Pioneer Organism
Food Web
Carbon Cycle 1
Omnivores
2. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Pioneer Organism
Nitrogen Cycle 2
Substratum-pH
Epiphytes
3. Rhododendrons and pines are more suited for growth in acid oil
Nitrogen Cycle 4
Taiga Animals
Polar Region
Substratum-pH
4. Determined by the same decisive factors-temperatures and rainfall
Mutualims
Biosphere
Nature of Biomes
Community
5. Every energy transfer involves a loss of energy and each level of the food chain uses some of the energy it obtains from the food for its own metabolism and loses some additional energy in the form of heat
Biotic Community
Hypotonic
Scavengers
Second Law of Thermodynamics
6. Includes the community and the environment and usually all five kingdoms
Ecosystem
Nekton
Epiphytes
Photic Zone
7. Determine by the amount of decaying plant and animal life in the soil
Substratum-Humus
Symbionts
Marshes
Predator-Prey relationship
8. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Communities
Marine Biomes
Symbionts
Photic zone
9. Symbiotic relationship from which both organisms derive some benefit
Mutualims
Intertidal Zone Population
Nitrogen
Environment
10. 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
Pelagic Zone
Intertidal Zone
Ecosystem
11. Determines water holding capacity
Dentrified
Substratum-texture
Carbon Cycle 2
Physical Environment- Water
12. 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
Biotic Environment
Taiga Biome
Photic zone
Primary Consumers
13. The vegetation that becomes dominant and stable after years of evolutiionary development
Coimax Vegetatioin
Osmoregulation
Intertidal Zone Population
Herbivores
14. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Taiga Animals
Photic Zone animals
Aquatic Biomes
Aphotic Zone animals
15. Group of organisms of the same species living together in a given location
Population
Pyramid of Energy
Pyramid of Numbers
Photic Zone
16. Free-living organisms that feed on other living organisms
Photic Zone
Desert animals
Ecosystem
Predators
17. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Intertidal Zone
Obligatory
Organism
Substratum (soil/rock)
18. Integrated system of species that are dependent upon one another for survival
Conditions for stability in an Ecosystem
Hydrosphere
Community
Nitrogen cycle 1
19. 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
Predator-Prey relationship
Desert Biome
Competition Same Niche
Carbon Cycle 1
20. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Climax Community
Predator-Prey relationship
Niche
Aphotic Zone
21. One or both organisms can't survive without the other
Obligatory
Food Web
Nitrified
Pyramid of Numbers
22. 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
Marshes
Scavengers
Primary Consumers
Hypotonic
23. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Temperate Deciduous Forest Biome
Pelagic Zone
Aphotic Zone animals
Lithosphere
24. 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
Competition
Community
Intertidal Zone
25. Distinct community in a geographic region
Successive Communities
Biome
Producers
Marine Biomes
26. 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 Coniferous Forest Biome
Grassland Biome
Competition Same Niche
Ecology
27. Animals that consume only plants or plant foods
Grassland Biome
Communities
Herbivores
Heterotrophs
28. Developed long legs and many are hoofed
Herbivores
Cohesive Force
Grassland Animals
Aphotic Zone
29. Rock and soil surface
Substratum-Humus
Lithosphere
Pyramid of Numbers
Hydrosphere
30. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Marine Biomes
Environmental Factors
Niche
Tundra Biome
31. Composed of populations that are able to exist under the new conditions
Successive Communities
Thundra Animals
Deep-sea Organisms
Nitrogen Cycle 3
32. Animals that consume dead animals
Material Cycles
Scavengers
Obligatory
Biosphere
33. Deer - fox - woodchuck - and squirrel
Temperate Deciduous Forest Animals
Physical Environment-Temperature
Photic zone
Ecology
34. 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
Temperate Deciduous Forest Animals
Grassland Animals
Marine Biomes
35. When a parasite benefits at the expense of the host
Parasitism
Photic zone
Aphotic Zone animals
Food Chain
36. Conserve water actively
Desert Plants
Omnivores
Temperate Deciduous Forest Biome
Competition
37. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Predators
Hemeothermic (Warm Blooded)
Aphotic Zone
Biome
38. Determines the nature of plant and animal life in the soil
Substratum (soil/rock)
Desert Plants
Benthos
Abiotic (Physical) Environment
39. Recycle water - oxygen - and phosphorus
Tertiary Consumers
Secondary Consumers
Substratum-texture
Other Cycles
40. One species may be competitively superior to the other and drive the second to extinction
Competition Same Niche
Polar Region
Secondary Consumers
Autotrophs
41. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Tundra Plants
Climax Community
Nitrified
Littoral Zone
42. Include saprophytic organisms and organisms of decay
Nature of Biomes
Other Cycles
Producers
Decomposer
43. The study of interactions between organisms and their environment
Ecology
Photic Zone
Nitrogen Cycle 3
Other Cycles
44. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Hypotonic
Dominant Species
Hydrosphere
Nekton
45. Adaptations for maintaining their internal osmolarity and conserving water
Photic Zone animals
Hemeothermic (Warm Blooded)
Osmoregulation
Scavengers
46. Nekton and benthos - scavengers - and predators (fiercely competitive)
Carbon Cycle 2
Aphotic Zone animals
Desert animals
Competition
47. Sunlit layer of the open sea extending to a depth of 250-600ft
Cohesive Force
Photic zone
Intertidal Zone Population
Autotrophs
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
Environmental Factors
Carbon Cycle 3
Conditions for stability in an Ecosystem
Sere
49. 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
Nitrogen Cycle 5
Aquatic Biomes
Second Law of Thermodynamics
Cohesive Force
50. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Osmoregulation
Second Law of Thermodynamics
Tropical Rain Forest Animals
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