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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. Because organisms at the upper levels of the food chain derive their food energy from organisms at lower levels - and because energy is lost from one level to the next - each level can support a successively smaller biomass
Aphotic Zone animals
Grassland Biome
Thundra Animals
Pyramid of Mass
2. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Carnivores
Tertiary Consumers
Ecology
Organism
3. Conserve water actively
Desert Plants
Obligatory
Biosphere
Deep-sea Organisms
4. Rhododendrons and pines are more suited for growth in acid oil
Poikilothermic (Cold Blooded)
Herbivores
Food Web
Substratum-pH
5. Organisms that manufacture their own food
Substratum-Minerals
Nitrogen Cycle 2
Autotrophs
Abiotic (Physical) Environment
6. 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
Other Cycles
Epiphytes
Grassland Biome
Substratum-texture
7. 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
Photic Zone
Taiga Plants
Nitrogen Cycle 4
Obligatory
8. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Marine Biomes
Aphotic Zone
Desert Plants
Pyramid of Mass
9. Region typical of the open seas and can be divided into photic and aphotic zones
Lithosphere
Pelagic Zone
Carbon Cycle 1
Organism
10. 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
Carbon Cycle 1
Nitrogen Cycle 2
Desert Biome
Tropical Rain Forest Biome
11. The vegetation that becomes dominant and stable after years of evolutiionary development
Coimax Vegetatioin
Hemeothermic (Warm Blooded)
Other Cycles
Dentrified
12. Animals that consume only plants or plant foods
Biotic Community
Herbivores
Dentrified
Aphotic Zone animals
13. Determines the nature of plant and animal life in the soil
Substratum (soil/rock)
Pyramid of Mass
Second Law of Thermodynamics
Nitrogen cycle 1
14. Composed of populations that are able to exist under the new conditions
Successive Communities
Parasitism
Competition Same Niche 3
Aphotic Zone
15. Developed long legs and many are hoofed
Osmoregulation
Aquatic Biomes
Grassland Animals
Other Cycles
16. The major component of the internal environment of all living things
Population
Littoral Zone
Climax Community
Physical Environment- Water
17. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Littoral Zone Populations
Community
Saprophytes
Predator-Prey relationship
18. Distinct community in a geographic region
Physical Environment- Water
Tundra Biome
Biome
Environmental Factors
19. One species may be competitively superior to the other and drive the second to extinction
Abiotic (Physical) Environment
Biosphere
Temperate Deciduous Forest Plants
Competition Same Niche
20. Group of organisms of the same species living together in a given location
Biotic Community
Osmoregulation
Aquatic Biomes
Population
21. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Climate and weather
Intertidal Zone
Photic Zone
Marshes
22. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Physical Environment-Sunlight
Hemeothermic (Warm Blooded)
Coimax Vegetatioin
Primary Consumers
23. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Taiga Biome
Substratum-texture
Pyramid of Numbers
Temperate Coniferous Plants
24. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Hydrosphere
Aphotic Zone
Parasitism
Nitrified
25. When one organism is benefited by the association and the other is not affected
Substratum-pH
Nitrogen Cycle 3
Grassland Biome
Commensalism
26. 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
Intraspecific Interactions
Nitrogen cycle 1
Aquatic Biomes
Sere
27. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Pioneer Organism
Symbionts
Photic Zone animals
Grassland Animals
28. Rivers - lakes - ponds - and marshes
Desert Plants
Predators
Freshwater Biomes
Competition
29. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Rootlike holdfasts
Biosphere
Epiphytes
Environment
30. Includes the community and the environment and usually all five kingdoms
Tundra Plants
Ecosystem
Hemeothermic (Warm Blooded)
Sere
31. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Poikilothermic (Cold Blooded)
Nitrogen Cycle 2
Tropical Rain Forest Animals
Rootlike holdfasts
32. One that exerts control over the other species that are present
Dominant Species
Biome
Taiga Biome
Symbionts
33. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Nekton
Parasitism
Physical Environment-Temperature
Taiga Animals
34. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Scavengers
Nitrogen Cycle 2
Ecosystem
Heterotrophs
35. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Pyramid of Numbers
Temperate Deciduous Forest Biome
Littoral Zone Populations
Nitrified
36. 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
Tundra Plants
Pyramid of Energy
Parasitism
Substratum-texture
37. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Marshes
Temperate Deciduous Forest Biome
Obligatory
Pyramid of Numbers
38. Crawling and sessile organsms
Biosphere
Benthos
Biotic Environment
Polar Region
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
Pyramid of Energy
Material Cycles
Producers
Species
40. Forest floors contain moss and lichens
Taiga Plants
Biome
Biotic Environment
Carbon Cycle 3
41. Deer - fox - woodchuck - and squirrel
Littoral Zone Populations
Community
Benthos
Temperate Deciduous Forest Animals
42. 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
Biome
Substratum (soil/rock)
Aquatic Biomes
43. Links between oceans and land
Environmental Factors
Aphotic Zone
Marshes
Material Cycles
44. Animals that consume dead animals
Primary Consumers
Scavengers
Littoral Zone Populations
Mutualims
45. Rock and soil surface
Competition Same Niche 2
Population
Lithosphere
Cohesive Force
46. Determine by the amount of decaying plant and animal life in the soil
Substratum-Humus
Biotic Community
Benthos
Taiga Animals
47. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Nitrogen
Abiotic (Physical) Environment
Tundra Plants
Littoral Zone
48. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Obligatory
Environmental Factors
Dentrified
49. Community in an ecological succession is identified by a dominant species
Photic zone
Grassland Animals
Sere
Substratum-pH
50. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Symbionts
Producers
Nitrogen Cycle 4
Other Cycles