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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.
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. The chief disruptive force
Competition
Physical Environment-Sunlight
Intertidal Zone Population
Competition Same Niche 2
2. Developed long legs and many are hoofed
Grassland Animals
Substratum-pH
Carbon Cycle 2
Temperate Deciduous Forest Biome
3. Determined by the same decisive factors-temperatures and rainfall
Hydrosphere
Physical Environment-Sunlight
Coimax Vegetatioin
Nature of Biomes
4. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Decomposer
Aphotic Zone
Hydrosphere
Poikilothermic (Cold Blooded)
5. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Hemeothermic (Warm Blooded)
Tropical Rain Forest Animals
Physical Environment-Temperature
Nature of Biomes
6. Animals that consume only plants or plant foods
Herbivores
Grassland Animals
Communities
Nekton
7. Include saprophytic organisms and organisms of decay
Conditions for stability in an Ecosystem
Desert animals
Decomposer
Other Cycles
8. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Nitrified
Tropical Rain Forest Plants
Temperate Deciduous Forest Plants
Carbon Cycle 2
9. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Marine Biomes
Biotic Environment
Communities
Material Cycles
10. 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
Biosphere
Carnivores
Nitrogen cycle 1
Pyramid of Energy
11. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Intertidal Zone Population
Food Chain
Parasitism
Ecosystem
12. 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
Deep-sea Organisms
Second Law of Thermodynamics
Niche
Omnivores
13. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Carnivores
Marine Biomes
Nitrified
Producers
14. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Physical Environment- Water
Climax Community
Rootlike holdfasts
Commensalism
15. 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
Taiga Biome
Competition Same Niche 3
Tropical Rain Forest Biome
Climate and weather
16. Used to include only the population and not their physical environment
Biotic Community
Nature of Biomes
Freshwater Biomes
Taiga Plants
17. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Obligatory
Taiga Biome
Tertiary Consumers
Symbionts
18. Algae - crabs - crustacea - and many different species of fish
Littoral Zone Populations
Taiga Biome
Biotic Community
Food Chain
19. 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
Commensalism
Temperate Coniferous Plants
Taiga Biome
20. 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
Nitrogen Cycle 2
Intertidal Zone
Saprophytes
Autotrophs
21. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Predator-Prey relationship
Pyramid of Numbers
Desert animals
Species
22. First to resettle a virgin area
Other Cycles
Pioneer Organism
Carbon Cycle 1
Grassland Biome
23. 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
Hypotonic
Commensalism
Hemeothermic (Warm Blooded)
Pyramid of Energy
24. Free-living organisms that feed on other living organisms
Scavengers
Photic Zone animals
Aquatic Biomes
Predators
25. Polar bears - musk oxen - and arctic hens
Thundra Animals
Obligatory
Tropical Rain Forest Animals
Taiga Plants
26. Include reproduction and protection from predators and destructive weather
Other Cycles
Pioneer Organism
Cohesive Force
Desert Biome
27. Crawling and sessile organsms
Benthos
Nitrified
Cohesive Force
Decomposer
28. Region typical of the open seas and can be divided into photic and aphotic zones
Obligatory
Pelagic Zone
Nekton
Hemeothermic (Warm Blooded)
29. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Pyramid of Numbers
Intertidal Zone Population
Lithosphere
Taiga Animals
30. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Grassland Biome
Substratum-Humus
Producers
Pioneer Organism
31. Only animal life and other heterotrophic life exists
Aphotic Zone
Ecosystem
Nitrified
Biotic Environment
32. Determine by the amount of decaying plant and animal life in the soil
Environment
Tropical Rain Forest Animals
Substratum-Humus
Ecosystem
33. When a parasite benefits at the expense of the host
Parasitism
Predators
Pyramid of Mass
Nitrogen Cycle 3
34. Composed of populations that are able to exist under the new conditions
Intertidal Zone Population
Nekton
Substratum-pH
Successive Communities
35. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Temperate Coniferous Plants
Nekton
Nitrogen Cycle 4
Aphotic Zone animals
36. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Saprophytes
Carbon Cycle 2
Parasitism
Epiphytes
37. Includes climate - temperature - availability of light and water - and the local topology
Abiotic (Physical) Environment
Cohesive Force
Aphotic Zone
Biotic Environment
38. Animals that consume dead animals
Scavengers
Aquatic Biomes
Food Pyramids
Environment
39. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Intraspecific Interactions
Sere
Scavengers
Nekton
40. When one organism is benefited by the association and the other is not affected
Obligatory
Intertidal Zone Population
Commensalism
Biome
41. 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
Desert Biome
Food Pyramids
Tropical Rain Forest Plants
Biosphere
42. Determines water holding capacity
Climax Community
Cohesive Force
Substratum-texture
Communities
43. Encompasses all that is external to the organism and is necessary for its existence
Nekton
Environment
Saprophytes
Benthos
44. Forest floors contain moss and lichens
Rootlike holdfasts
Climax Community
Secondary Consumers
Taiga Plants
45. 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
Aphotic Zone
Substratum-texture
Lithosphere
Competition Same Niche 2
46. Animals eat plants and use the digested nutrients to form carbohydrates - fats - and proteins characteristic of the species. a part of these organic compounds is used as fuel in respiration in plants and animals
Carbon Cycle 2
Ecological Succession
Tropical Rain Forest Biome
Pioneer Organism
47. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Carbon Cycle 1
Biotic Environment
Commensalism
Autotrophs
48. Freshwater Biomes vs. Saltwater 2: In rivers and streams - strong swift currents exist - and thus fish that have developed strong muscles and plants with _____________ have survived
Predators
Grassland Biome
Littoral Zone
Rootlike holdfasts
49. Links between oceans and land
Marshes
Decomposer
Climax Community
Tundra Plants
50. Conserve water actively
Successive Communities
Substratum-Humus
Intertidal Zone Population
Desert Plants
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