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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.
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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. Rhododendrons and pines are more suited for growth in acid oil
Competition Same Niche
Substratum-pH
Niche
Community
2. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Photic zone
Hemeothermic (Warm Blooded)
Nitrogen Cycle 5
Food Chain
3. Include reproduction and protection from predators and destructive weather
Decomposer
Cohesive Force
Nekton
Epiphytes
4. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Carbon Cycle 2
Littoral Zone Populations
Physical Environment-Temperature
Benthos
5. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Cohesive Force
Carbon Cycle 3
Organism
Grassland Animals
6. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Nitrogen Cycle 2
Ecosystem
Marshes
Second Law of Thermodynamics
7. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Hemeothermic (Warm Blooded)
Tropical Rain Forest Animals
Desert animals
Aphotic Zone
8. 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
Carbon Cycle 2
Successive Communities
Commensalism
9. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Pyramid of Mass
Nitrogen Cycle 5
Intertidal Zone Population
Poikilothermic (Cold Blooded)
10. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Grassland Animals
Commensalism
Environmental Factors
Taiga Animals
11. Needs constant energy source and cycling of materials between the living system
Pyramid of Mass
Conditions for stability in an Ecosystem
Intertidal Zone
Successive Communities
12. When a parasite benefits at the expense of the host
Climax Community
Substratum-Humus
Parasitism
Predator-Prey relationship
13. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Nekton
Aquatic Biomes
Rootlike holdfasts
Heterotrophs
14. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Climax Community
Deep-sea Organisms
Poikilothermic (Cold Blooded)
Autotrophs
15. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Sere
Taiga Biome
Thundra Animals
Ecological Succession
16. 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
Dominant Species
Taiga Animals
Competition Same Niche
17. Group of organisms of the same species living together in a given location
Population
Competition Same Niche 3
Aphotic Zone
Temperate Coniferous Forest Biome
18. 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
Environment
Pelagic Zone
Grassland Animals
Second Law of Thermodynamics
19. Lichens and moss
Food Pyramids
Taiga Animals
Osmoregulation
Tundra Plants
20. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Grassland Animals
Littoral Zone
Nekton
Tropical Rain Forest Biome
21. Region typical of the open seas and can be divided into photic and aphotic zones
Tundra Plants
Pelagic Zone
Hydrosphere
Nitrogen Cycle 5
22. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Taiga Biome
Niche
Pyramid of Numbers
Producers
23. Elemental nitrogen is chemically inert and cannot be used by most organisms. Lightning and nitrogen-fixing bacteria in the roots of legumes change the nitrogen into the usable - soluble nitrates
Pioneer Organism
Taiga Plants
Nitrogen cycle 1
Parasitism
24. 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
Hydrosphere
Freshwater Biomes
Carbon Cycle 3
25. Animals that consume primary consumers (carnivores)
Tropical Rain Forest Biome
Nitrogen cycle 1
Population
Secondary Consumers
26. Polar bears - musk oxen - and arctic hens
Thundra Animals
Herbivores
Food Web
Temperate Coniferous Plants
27. Symbiotic relationship from which both organisms derive some benefit
Mutualims
Biosphere
Nitrogen Cycle 5
Abiotic (Physical) Environment
28. Forest floors contain moss and lichens
Taiga Plants
Desert animals
Other Cycles
Commensalism
29. First to resettle a virgin area
Polar Region
Pioneer Organism
Nekton
Predator-Prey relationship
30. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Biotic Community
Environmental Factors
Littoral Zone
Producers
31. Used to include only the population and not their physical environment
Substratum-texture
Biotic Community
Taiga Plants
Substratum (soil/rock)
32. One or both organisms can't survive without the other
Hemeothermic (Warm Blooded)
Obligatory
Environmental Factors
Other Cycles
33. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Second Law of Thermodynamics
Tropical Rain Forest Animals
Nitrogen
Nature of Biomes
34. Determines the nature of plant and animal life in the soil
Tundra Plants
Substratum (soil/rock)
Grassland Biome
Marine Biomes
35. 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
Abiotic (Physical) Environment
Biotic Community
Carbon Cycle 1
Carbon Cycle 2
36. One that exerts control over the other species that are present
Temperate Coniferous Forest Biome
Nitrogen Cycle 4
Dominant Species
Grassland Biome
37. 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
Nature of Biomes
Climate and weather
Environment
Saprophytes
38. Determine by the amount of decaying plant and animal life in the soil
Competition
Nitrogen Cycle 3
Substratum-Humus
Desert Biome
39. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Material Cycles
Aphotic Zone
Substratum-Minerals
Intraspecific Interactions
40. Include saprophytic organisms and organisms of decay
Decomposer
Physical Environment-Sunlight
Scavengers
Commensalism
41. 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
Community
Species
Rootlike holdfasts
Pelagic Zone
42. 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
Food Pyramids
Carbon Cycle 2
Pioneer Organism
Intertidal Zone
43. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Nekton
Competition Same Niche 2
Photic zone
Biosphere
44. Algae - crabs - crustacea - and many different species of fish
Mutualims
Temperate Deciduous Forest Plants
Producers
Littoral Zone Populations
45. 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
Autotrophs
Saprophytes
Organism
Carbon Cycle 3
46. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Biotic Community
Biotic Environment
Tropical Rain Forest Animals
Omnivores
47. 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
Aquatic Biomes
Tundra Biome
Primary Consumers
Littoral Zone
48. 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
Climax Community
Pelagic Zone
Pyramid of Energy
Heterotrophs
49. Animals that feed on secondary consumer
Temperate Coniferous Forest Biome
Tertiary Consumers
Intertidal Zone Population
Carbon Cycle 3
50. The ultimate source of energy for all organisms
Physical Environment-Sunlight
Osmoregulation
Tropical Rain Forest Biome
Tropical Rain Forest Plants
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