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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. Includes climate - temperature - availability of light and water - and the local topology
Abiotic (Physical) Environment
Climax Community
Second Law of Thermodynamics
Osmoregulation
2. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Producers
Sere
Temperate Deciduous Forest Animals
Pioneer Organism
3. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Desert animals
Substratum-Humus
Photic Zone animals
Environmental Factors
4. Two species may rapidly evolve in divergent directions under the strong selection pressure resulting from intense competition. thus - the two species would rapidly evolve greater differences in their niches
Pyramid of Numbers
Competition Same Niche 3
Carbon Cycle 2
Species
5. 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
Environmental Factors
Tertiary Consumers
Scavengers
6. One species may be competitively superior to the other and drive the second to extinction
Competition Same Niche
Community
Intertidal Zone Population
Pioneer Organism
7. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Tropical Rain Forest Biome
Scavengers
Dentrified
Littoral Zone Populations
8. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Nitrified
Intertidal Zone Population
Pelagic Zone
Intraspecific Interactions
9. 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 Biome
Species
Food Chain
Grassland Animals
10. 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
Intraspecific Interactions
Freshwater Biomes
Food Pyramids
Polar Region
11. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Scavengers
Heterotrophs
Nitrogen Cycle 2
Marine Biomes
12. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Biosphere
Pyramid of Energy
Nitrogen
Sere
13. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Osmoregulation
Biome
Hemeothermic (Warm Blooded)
Scavengers
14. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Ecosystem
Nitrogen Cycle 3
Predators
Poikilothermic (Cold Blooded)
15. Affect the type of vegetation that can be supported
Aphotic Zone
Substratum-Minerals
Autotrophs
Food Web
16. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Nitrogen Cycle 4
Climate and weather
Pyramid of Numbers
Epiphytes
17. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Ecological Succession
Parasitism
Marine Biomes
Pelagic Zone
18. Crawling and sessile organsms
Saprophytes
Commensalism
Conditions for stability in an Ecosystem
Benthos
19. Deer - fox - woodchuck - and squirrel
Pyramid of Energy
Abiotic (Physical) Environment
Temperate Deciduous Forest Animals
Substratum-Minerals
20. 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
Competition Same Niche 3
Carbon Cycle 1
Tundra Biome
Substratum-texture
21. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Conditions for stability in an Ecosystem
Photic Zone
Heterotrophs
Physical Environment-Sunlight
22. Any group of similar organisms that are capable of reproducing
Species
Pyramid of Energy
Food Chain
Temperate Deciduous Forest Biome
23. One that exerts control over the other species that are present
Temperate Deciduous Forest Biome
Primary Consumers
Other Cycles
Dominant Species
24. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Parasitism
Pyramid of Numbers
Photic Zone animals
Heterotrophs
25. The oceans
Ecology
Hydrosphere
Biotic Community
Nitrogen Cycle 3
26. Composed of populations that are able to exist under the new conditions
Freshwater Biomes
Deep-sea Organisms
Successive Communities
Tropical Rain Forest Animals
27. Include saprophytic organisms and organisms of decay
Decomposer
Physical Environment-Sunlight
Pyramid of Energy
Material Cycles
28. Links between oceans and land
Producers
Marshes
Temperate Deciduous Forest Plants
Tertiary Consumers
29. Two fates await the ammonia (NH3). some are nitrified or dentrified
Primary Consumers
Tropical Rain Forest Biome
Nitrogen Cycle 5
Saprophytes
30. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Successive Communities
Temperate Deciduous Forest Plants
Conditions for stability in an Ecosystem
Taiga Animals
31. Recycle water - oxygen - and phosphorus
Other Cycles
Food Pyramids
Taiga Plants
Material Cycles
32. Determined by the same decisive factors-temperatures and rainfall
Competition Same Niche 2
Material Cycles
Nature of Biomes
Aphotic Zone
33. Animals that feed on secondary consumer
Carbon Cycle 3
Second Law of Thermodynamics
Saprophytes
Tertiary Consumers
34. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Intertidal Zone
Competition Same Niche
Desert Biome
Photic Zone animals
35. Animals that consume only plants or plant foods
Niche
Commensalism
Herbivores
Ecological Succession
36. The vegetation that becomes dominant and stable after years of evolutiionary development
Obligatory
Littoral Zone Populations
Mutualims
Coimax Vegetatioin
37. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Parasitism
Tropical Rain Forest Biome
Tropical Rain Forest Animals
Dentrified
38. 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
Other Cycles
Tropical Rain Forest Biome
Niche
Nitrogen Cycle 4
39. 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
Lithosphere
Carbon Cycle 1
Food Pyramids
Substratum-pH
40. Polar bears - musk oxen - and arctic hens
Obligatory
Climax Community
Species
Thundra Animals
41. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Nitrified
Cohesive Force
Intertidal Zone Population
Predator-Prey relationship
42. Encompasses all that is external to the organism and is necessary for its existence
Environment
Obligatory
Mutualims
Conditions for stability in an Ecosystem
43. Animals that consume primary consumers (carnivores)
Intraspecific Interactions
Coimax Vegetatioin
Secondary Consumers
Aphotic Zone
44. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Littoral Zone
Aphotic Zone
Symbionts
Climax Community
45. Food chain is not a simple linear chain but an intricate web
Dominant Species
Food Web
Tundra Biome
Photic zone
46. 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
Parasitism
Competition Same Niche 2
Population
Omnivores
47. Rhododendrons and pines are more suited for growth in acid oil
Substratum-pH
Competition
Intraspecific Interactions
Omnivores
48. Conserve water actively
Food Chain
Temperate Deciduous Forest Plants
Desert Plants
Organism
49. 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
Pyramid of Energy
Parasitism
Pelagic Zone
Photic zone
50. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Aphotic Zone
Nekton
Food Chain
Community