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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. Community in an ecological succession is identified by a dominant species
Organism
Poikilothermic (Cold Blooded)
Sere
Aphotic Zone
2. Animals that feed on secondary consumer
Tundra Biome
Nitrogen
Tertiary Consumers
Pyramid of Energy
3. Animals that consume green plants (herbivores)
Material Cycles
Aphotic Zone
Photic Zone animals
Primary Consumers
4. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Predator-Prey relationship
Dentrified
Pelagic Zone
Substratum-Humus
5. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Polar Region
Biotic Community
Secondary Consumers
Abiotic (Physical) Environment
6. Determines water holding capacity
Pyramid of Energy
Biotic Environment
Desert Biome
Substratum-texture
7. Region typical of the open seas and can be divided into photic and aphotic zones
Pelagic Zone
Climate and weather
Tropical Rain Forest Plants
Nature of Biomes
8. 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
Poikilothermic (Cold Blooded)
Physical Environment-Temperature
Tundra Plants
Nitrogen cycle 1
9. One that exerts control over the other species that are present
Taiga Plants
Nitrogen Cycle 2
Food Web
Dominant Species
10. 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
Nitrogen Cycle 3
Tropical Rain Forest Plants
Pyramid of Energy
Marshes
11. Group of organisms of the same species living together in a given location
Species
Lithosphere
Carbon Cycle 1
Population
12. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Substratum-Humus
Tundra Plants
Ecosystem
Littoral Zone
13. The oceans
Pyramid of Numbers
Competition Same Niche 3
Aphotic Zone animals
Hydrosphere
14. 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
Niche
Population
Dominant Species
Physical Environment-Temperature
15. Conserve water actively
Photic zone
Substratum-pH
Pelagic Zone
Desert Plants
16. Food chain is not a simple linear chain but an intricate web
Polar Region
Food Web
Tropical Rain Forest Plants
Competition Same Niche 2
17. Encompasses all that is external to the organism and is necessary for its existence
Desert animals
Parasitism
Environment
Tundra Biome
18. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Decomposer
Predator-Prey relationship
Successive Communities
Tropical Rain Forest Biome
19. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Aphotic Zone
Nitrogen Cycle 5
Commensalism
Nitrogen
20. The ultimate source of energy for all organisms
Predator-Prey relationship
Substratum (soil/rock)
Physical Environment-Sunlight
Other Cycles
21. 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
Obligatory
Taiga Biome
Competition Same Niche 2
Tropical Rain Forest Animals
22. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Deep-sea Organisms
Tropical Rain Forest Plants
Mutualims
Temperate Coniferous Plants
23. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Competition Same Niche 3
Biosphere
Carnivores
Autotrophs
24. Regiong beneatht he photic zone that receives no light
Physical Environment-Sunlight
Aphotic Zone
Food Web
Littoral Zone Populations
25. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Food Pyramids
Organism
Species
Marshes
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
Physical Environment- Water
Organism
Nature of Biomes
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
Carnivores
Nitrogen Cycle 5
Intraspecific Interactions
Ecosystem
28. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Epiphytes
Desert Plants
Cohesive Force
Symbionts
29. Lichens and moss
Pioneer Organism
Competition Same Niche 2
Conditions for stability in an Ecosystem
Tundra Plants
30. Include saprophytic organisms and organisms of decay
Predators
Pioneer Organism
Decomposer
Tropical Rain Forest Biome
31. 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
Nitrogen cycle 1
Temperate Coniferous Forest Biome
Epiphytes
Carbon Cycle 2
32. Animals that consume dead animals
Environment
Scavengers
Pioneer Organism
Littoral Zone Populations
33. Two fates await the ammonia (NH3). some are nitrified or dentrified
Physical Environment-Temperature
Nitrogen Cycle 5
Predator-Prey relationship
Biome
34. Only animal life and other heterotrophic life exists
Pyramid of Mass
Photic Zone
Competition Same Niche 3
Aphotic Zone
35. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Organism
Physical Environment-Temperature
Deep-sea Organisms
Carbon Cycle 2
36. Algae - crabs - crustacea - and many different species of fish
Biotic Environment
Environment
Population
Littoral Zone Populations
37. Animals that eat both plants and animals
Competition Same Niche 3
Omnivores
Intertidal Zone Population
Pyramid of Numbers
38. 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
Decomposer
Nitrogen cycle 1
Temperate Deciduous Forest Biome
Hypotonic
39. First to resettle a virgin area
Pioneer Organism
Successive Communities
Tropical Rain Forest Plants
Aphotic Zone animals
40. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Autotrophs
Substratum (soil/rock)
Intertidal Zone
Dentrified
41. Forest floors contain moss and lichens
Substratum-texture
Herbivores
Scavengers
Taiga Plants
42. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Competition Same Niche
Epiphytes
Pelagic Zone
Biotic Community
43. Composed of populations that are able to exist under the new conditions
Successive Communities
Tertiary Consumers
Intertidal Zone Population
Biotic Environment
44. The chief disruptive force
Obligatory
Competition
Rootlike holdfasts
Poikilothermic (Cold Blooded)
45. Vegetation such as vines and eppiphytes
Commensalism
Tropical Rain Forest Plants
Thundra Animals
Desert Plants
46. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Temperate Deciduous Forest Plants
Cohesive Force
Heterotrophs
Ecological Succession
47. 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
Grassland Biome
Nitrogen cycle 1
Osmoregulation
Biome
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
Hypotonic
Carbon Cycle 3
Desert Plants
Competition Same Niche 2
49. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Temperate Deciduous Forest Biome
Food Pyramids
Marshes
Food Web
50. 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
Carbon Cycle 3
Tundra Plants
Climate and weather
Mutualims
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