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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
Physical Environment-Temperature
Substratum-Minerals
Aphotic Zone animals
Thundra Animals
2. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Freshwater Biomes
Symbionts
Aphotic Zone
Nitrogen Cycle 4
3. Determine by the amount of decaying plant and animal life in the soil
Competition
Temperate Coniferous Plants
Photic zone
Substratum-Humus
4. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Taiga Plants
Temperate Deciduous Forest Biome
Substratum-Humus
Desert animals
5. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Communities
Environment
Taiga Animals
Organism
6. Used to include only the population and not their physical environment
Tundra Biome
Tropical Rain Forest Biome
Aphotic Zone
Biotic Community
7. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Nature of Biomes
Secondary Consumers
Predator-Prey relationship
Hypotonic
8. 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
Omnivores
Desert Biome
Aphotic Zone
Taiga Animals
9. 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
Pyramid of Energy
Biotic Community
Niche
Physical Environment-Temperature
10. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Tundra Biome
Biotic Community
Substratum (soil/rock)
Poikilothermic (Cold Blooded)
11. 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
Mutualims
Food Pyramids
Obligatory
Nitrogen cycle 1
12. Crawling and sessile organsms
Benthos
Temperate Deciduous Forest Biome
Nitrogen Cycle 3
Nitrified
13. Polar bears - musk oxen - and arctic hens
Taiga Biome
Commensalism
Thundra Animals
Cohesive Force
14. The chief disruptive force
Photic zone
Carbon Cycle 1
Nitrogen cycle 1
Competition
15. 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
Temperate Coniferous Forest Biome
Cohesive Force
Successive Communities
Climate and weather
16. Encompasses all that is external to the organism and is necessary for its existence
Temperate Coniferous Plants
Littoral Zone Populations
Environment
Competition Same Niche 2
17. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Heterotrophs
Grassland Animals
Biotic Environment
Food Pyramids
18. Group of organisms of the same species living together in a given location
Omnivores
Littoral Zone Populations
Population
Producers
19. 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
Carnivores
Carbon Cycle 1
Deep-sea Organisms
Saprophytes
20. The vegetation that becomes dominant and stable after years of evolutiionary development
Biotic Environment
Pyramid of Numbers
Coimax Vegetatioin
Nekton
21. 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
Competition
Nitrogen Cycle 5
Littoral Zone
Nitrogen Cycle 4
22. Animals that feed on secondary consumer
Tertiary Consumers
Climax Community
Autotrophs
Community
23. Organisms that manufacture their own food
Deep-sea Organisms
Nitrogen Cycle 5
Autotrophs
Substratum-pH
24. Regiong beneatht he photic zone that receives no light
Aphotic Zone animals
Predators
Tropical Rain Forest Plants
Aphotic Zone
25. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Ecological Succession
Photic zone
Biotic Environment
Tundra Biome
26. First to resettle a virgin area
Taiga Biome
Tertiary Consumers
Photic zone
Pioneer Organism
27. Lichens and moss
Tundra Plants
Intertidal Zone Population
Second Law of Thermodynamics
Tropical Rain Forest Biome
28. 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
Ecosystem
Second Law of Thermodynamics
Cohesive Force
Environmental Factors
29. The study of interactions between organisms and their environment
Grassland Biome
Food Web
Ecology
Omnivores
30. One or both organisms can't survive without the other
Benthos
Tertiary Consumers
Obligatory
Ecosystem
31. One that exerts control over the other species that are present
Dominant Species
Coimax Vegetatioin
Taiga Plants
Rootlike holdfasts
32. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Dominant Species
Intertidal Zone
Carbon Cycle 1
Intraspecific Interactions
33. Two fates await the ammonia (NH3). some are nitrified or dentrified
Pelagic Zone
Nitrogen Cycle 5
Tundra Plants
Freshwater Biomes
34. 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
Polar Region
Physical Environment- Water
Climate and weather
Nature of Biomes
35. Algae - crabs - crustacea - and many different species of fish
Niche
Obligatory
Tropical Rain Forest Biome
Littoral Zone Populations
36. One species may be competitively superior to the other and drive the second to extinction
Rootlike holdfasts
Climate and weather
Environmental Factors
Competition Same Niche
37. Animals that consume green plants (herbivores)
Ecology
Primary Consumers
Nitrified
Photic Zone
38. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Niche
Substratum (soil/rock)
Marine Biomes
Nitrogen Cycle 4
39. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Intertidal Zone Population
Dentrified
Communities
Biosphere
40. 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
Pyramid of Numbers
Nitrogen
Thundra Animals
Tundra Biome
41. 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
Food Pyramids
Marine Biomes
Substratum-pH
Nitrogen cycle 1
42. Sunlit layer of the open sea extending to a depth of 250-600ft
Community
Nitrogen cycle 1
Predators
Photic zone
43. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Primary Consumers
Marshes
Decomposer
44. Forest floors contain moss and lichens
Successive Communities
Taiga Plants
Nitrified
Intraspecific Interactions
45. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Nitrogen Cycle 2
Material Cycles
Predator-Prey relationship
Substratum-pH
46. Conserve water actively
Tundra Biome
Desert Plants
Grassland Animals
Polar Region
47. Determines water holding capacity
Photic Zone
Marine Biomes
Grassland Animals
Substratum-texture
48. Include reproduction and protection from predators and destructive weather
Taiga Plants
Commensalism
Taiga Animals
Cohesive Force
49. Recycle water - oxygen - and phosphorus
Grassland Animals
Species
Other Cycles
Substratum-texture
50. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Hemeothermic (Warm Blooded)
Saprophytes
Temperate Deciduous Forest Plants
Carbon Cycle 2