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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. Crawling and sessile organsms
Benthos
Lithosphere
Secondary Consumers
Climax Community
2. Food chain is not a simple linear chain but an intricate web
Conditions for stability in an Ecosystem
Food Web
Photic zone
Taiga Plants
3. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Decomposer
Tundra Biome
Material Cycles
Photic Zone
4. Determines the nature of plant and animal life in the soil
Ecosystem
Substratum (soil/rock)
Omnivores
Nekton
5. 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
Physical Environment-Sunlight
Climate and weather
Heterotrophs
Substratum-texture
6. Deer - fox - woodchuck - and squirrel
Other Cycles
Temperate Deciduous Forest Animals
Benthos
Secondary Consumers
7. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Obligatory
Temperate Deciduous Forest Plants
Temperate Deciduous Forest Animals
Predator-Prey relationship
8. Includes climate - temperature - availability of light and water - and the local topology
Abiotic (Physical) Environment
Intraspecific Interactions
Hypotonic
Photic zone
9. Organisms that manufacture their own food
Nitrogen Cycle 4
Autotrophs
Nitrogen
Grassland Biome
10. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Tropical Rain Forest Plants
Scavengers
Substratum (soil/rock)
Food Chain
11. 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
Aphotic Zone
Nitrogen Cycle 4
Osmoregulation
Niche
12. 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
Food Pyramids
Other Cycles
Community
Second Law of Thermodynamics
13. Include saprophytic organisms and organisms of decay
Physical Environment-Temperature
Decomposer
Substratum-texture
Material Cycles
14. Any group of similar organisms that are capable of reproducing
Marine Biomes
Niche
Lithosphere
Species
15. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Nitrogen Cycle 3
Competition
Intertidal Zone Population
Polar Region
16. 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 3
Epiphytes
Temperate Coniferous Forest Biome
Temperate Coniferous Plants
17. Integrated system of species that are dependent upon one another for survival
Tertiary Consumers
Rootlike holdfasts
Community
Pyramid of Energy
18. The chief disruptive force
Competition
Herbivores
Commensalism
Deep-sea Organisms
19. 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
Hypotonic
Species
Carbon Cycle 3
Primary Consumers
20. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Tertiary Consumers
Intertidal Zone
Hydrosphere
Carbon Cycle 1
21. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Environment
Nekton
Deep-sea Organisms
Benthos
22. Includes the community and the environment and usually all five kingdoms
Ecosystem
Temperate Deciduous Forest Animals
Predators
Physical Environment- Water
23. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Benthos
Taiga Animals
Nitrogen cycle 1
Environmental Factors
24. Regiong beneatht he photic zone that receives no light
Autotrophs
Tundra Biome
Aphotic Zone
Nitrogen cycle 1
25. 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
Tundra Plants
Biotic Environment
26. Symbiotic relationship from which both organisms derive some benefit
Tertiary Consumers
Mutualims
Benthos
Physical Environment-Temperature
27. 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
Littoral Zone Populations
Nitrogen cycle 1
Competition
Biosphere
28. Developed long legs and many are hoofed
Tropical Rain Forest Biome
Grassland Animals
Niche
Producers
29. When a parasite benefits at the expense of the host
Epiphytes
Carnivores
Parasitism
Littoral Zone
30. Nekton and benthos - scavengers - and predators (fiercely competitive)
Lithosphere
Photic zone
Competition Same Niche 3
Aphotic Zone animals
31. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Biosphere
Temperate Deciduous Forest Plants
Taiga Biome
Physical Environment-Temperature
32. 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 4
Intraspecific Interactions
Aquatic Biomes
Communities
33. Forest floors contain moss and lichens
Nekton
Material Cycles
Carbon Cycle 2
Taiga Plants
34. 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
Symbionts
Saprophytes
Taiga Biome
Grassland Animals
35. The study of interactions between organisms and their environment
Ecology
Communities
Commensalism
Marshes
36. Vegetation such as vines and eppiphytes
Population
Competition
Tropical Rain Forest Plants
Niche
37. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Lithosphere
Nitrogen Cycle 3
Competition Same Niche
Climate and weather
38. Polar bears - musk oxen - and arctic hens
Littoral Zone
Thundra Animals
Secondary Consumers
Carnivores
39. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Ecosystem
Epiphytes
Benthos
Temperate Deciduous Forest Biome
40. Community in an ecological succession is identified by a dominant species
Omnivores
Secondary Consumers
Cohesive Force
Sere
41. Region typical of the open seas and can be divided into photic and aphotic zones
Pelagic Zone
Environment
Dentrified
Polar Region
42. Links between oceans and land
Biosphere
Substratum-Minerals
Nature of Biomes
Marshes
43. One that exerts control over the other species that are present
Dominant Species
Environment
Population
Hypotonic
44. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Photic Zone
Communities
Temperate Coniferous Forest Biome
Environmental Factors
45. 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
Species
Nitrogen Cycle 4
Tropical Rain Forest Animals
Freshwater Biomes
46. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Deep-sea Organisms
Food Web
Physical Environment- Water
Biome
47. First to resettle a virgin area
Pioneer Organism
Nitrogen Cycle 4
Symbionts
Tropical Rain Forest Animals
48. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Photic Zone
Grassland Animals
Nitrogen Cycle 3
Temperate Coniferous Plants
49. Sunlit layer of the open sea extending to a depth of 250-600ft
Photic zone
Tropical Rain Forest Animals
Thundra Animals
Taiga Biome
50. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Decomposer
Temperate Deciduous Forest Biome
Tundra Plants
Tundra Biome