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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. Sunlit layer of the open sea extending to a depth of 250-600ft
Intertidal Zone Population
Photic zone
Competition Same Niche 3
Dentrified
2. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Intertidal Zone
Biotic Environment
Polar Region
Tundra Plants
3. Developed long legs and many are hoofed
Nitrified
Epiphytes
Niche
Grassland Animals
4. 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
Nitrogen cycle 1
Temperate Coniferous Plants
Carbon Cycle 2
Environment
5. Crawling and sessile organsms
Conditions for stability in an Ecosystem
Benthos
Coimax Vegetatioin
Nitrogen
6. Include saprophytic organisms and organisms of decay
Other Cycles
Nitrogen Cycle 3
Decomposer
Ecology
7. Links between oceans and land
Marshes
Tropical Rain Forest Animals
Substratum-pH
Food Web
8. When one organism is benefited by the association and the other is not affected
Commensalism
Saprophytes
Lithosphere
Food Chain
9. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Epiphytes
Ecology
Competition
Dentrified
10. Vegetation such as vines and eppiphytes
Tropical Rain Forest Plants
Substratum-Minerals
Autotrophs
Heterotrophs
11. Only animal life and other heterotrophic life exists
Primary Consumers
Producers
Dominant Species
Aphotic Zone
12. 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
Intraspecific Interactions
Substratum-Minerals
Food Pyramids
13. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Aphotic Zone
Tundra Biome
Scavengers
Nitrogen Cycle 2
14. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Climax Community
Nitrogen Cycle 5
Nekton
Nitrogen cycle 1
15. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Second Law of Thermodynamics
Desert animals
Biotic Community
Biome
16. One species may be competitively superior to the other and drive the second to extinction
Saprophytes
Competition Same Niche
Hemeothermic (Warm Blooded)
Competition Same Niche 2
17. Free-living organisms that feed on other living organisms
Saprophytes
Predators
Conditions for stability in an Ecosystem
Organism
18. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Obligatory
Predator-Prey relationship
Biosphere
Lithosphere
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
Community
Saprophytes
Hypotonic
Food Pyramids
20. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Deep-sea Organisms
Cohesive Force
Nature of Biomes
Secondary Consumers
21. Food chain is not a simple linear chain but an intricate web
Food Web
Lithosphere
Second Law of Thermodynamics
Nitrogen Cycle 3
22. Composed of populations that are able to exist under the new conditions
Tropical Rain Forest Animals
Desert Biome
Deep-sea Organisms
Successive Communities
23. Determines water holding capacity
Substratum-texture
Aphotic Zone
Physical Environment-Temperature
Aphotic Zone animals
24. Animals that eat both plants and animals
Taiga Animals
Omnivores
Temperate Deciduous Forest Animals
Physical Environment-Temperature
25. Animals that consume primary consumers (carnivores)
Substratum-texture
Temperate Coniferous Forest Biome
Secondary Consumers
Taiga Plants
26. 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
Biotic Environment
Physical Environment-Temperature
Nitrogen Cycle 4
27. When a parasite benefits at the expense of the host
Substratum-texture
Carnivores
Competition Same Niche 3
Parasitism
28. Includes climate - temperature - availability of light and water - and the local topology
Intraspecific Interactions
Ecosystem
Aphotic Zone animals
Abiotic (Physical) Environment
29. 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
Marshes
Tropical Rain Forest Animals
Climate and weather
Littoral Zone
30. Integrated system of species that are dependent upon one another for survival
Nitrified
Substratum-texture
Community
Dentrified
31. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Epiphytes
Substratum-Humus
Osmoregulation
Climax Community
32. Deer - fox - woodchuck - and squirrel
Temperate Deciduous Forest Animals
Producers
Nitrogen
Nekton
33. Animals that only eat other animals -possess pointed teeth and fang-like canine teeth for tearing flesh -have shorter digestive tracts because the easier digestibility of animal food
Temperate Deciduous Forest Animals
Competition Same Niche 3
Carnivores
Nature of Biomes
34. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Autotrophs
Tropical Rain Forest Animals
Tertiary Consumers
Marine Biomes
35. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Osmoregulation
Taiga Animals
Polar Region
Dentrified
36. Polar bears - musk oxen - and arctic hens
Thundra Animals
Substratum-Humus
Hydrosphere
Obligatory
37. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Secondary Consumers
Temperate Coniferous Plants
Poikilothermic (Cold Blooded)
Biosphere
38. The study of interactions between organisms and their environment
Littoral Zone
Carbon Cycle 3
Dominant Species
Ecology
39. Symbiotic relationship from which both organisms derive some benefit
Cohesive Force
Ecological Succession
Obligatory
Mutualims
40. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Physical Environment- Water
Grassland Animals
Biome
Intertidal Zone Population
41. Regiong beneatht he photic zone that receives no light
Tropical Rain Forest Animals
Marshes
Aphotic Zone
Commensalism
42. Organisms that manufacture their own food
Lithosphere
Tropical Rain Forest Biome
Autotrophs
Littoral Zone
43. Animals that feed on secondary consumer
Epiphytes
Tertiary Consumers
Cohesive Force
Carnivores
44. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Pyramid of Mass
Symbionts
Communities
Nitrogen
45. One that exerts control over the other species that are present
Dominant Species
Producers
Temperate Coniferous Plants
Obligatory
46. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Taiga Plants
Desert Plants
Organism
Temperate Coniferous Plants
47. Includes the community and the environment and usually all five kingdoms
Ecosystem
Food Web
Nitrogen Cycle 3
Coimax Vegetatioin
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
Climax Community
Rootlike holdfasts
Predator-Prey relationship
Poikilothermic (Cold Blooded)
49. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Competition Same Niche 2
Competition Same Niche
Predator-Prey relationship
Food Chain
50. The chief disruptive force
Competition
Nitrified
Aphotic Zone
Heterotrophs