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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
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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. Vegetation such as vines and eppiphytes
Heterotrophs
Grassland Biome
Aphotic Zone animals
Tropical Rain Forest Plants
2. Rock and soil surface
Lithosphere
Aphotic Zone animals
Climax Community
Nitrogen Cycle 5
3. Include reproduction and protection from predators and destructive weather
Dentrified
Cohesive Force
Substratum-Humus
Physical Environment-Temperature
4. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Marine Biomes
Temperate Deciduous Forest Plants
Grassland Biome
Physical Environment-Temperature
5. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Population
Nitrified
Ecology
Desert Plants
6. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Photic Zone
Climate and weather
Nekton
Symbionts
7. Adaptations for maintaining their internal osmolarity and conserving water
Photic Zone
Ecology
Successive Communities
Osmoregulation
8. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Predators
Carbon Cycle 1
Taiga Biome
Littoral Zone
9. The ultimate source of energy for all organisms
Saprophytes
Physical Environment-Temperature
Cohesive Force
Physical Environment-Sunlight
10. 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
Heterotrophs
Grassland Biome
Food Pyramids
Substratum-Minerals
11. Animals that consume only plants or plant foods
Intraspecific Interactions
Biome
Temperate Coniferous Forest Biome
Herbivores
12. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Predator-Prey relationship
Tropical Rain Forest Animals
Epiphytes
Temperate Coniferous Plants
13. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Taiga Animals
Deep-sea Organisms
Substratum-texture
Producers
14. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Intertidal Zone Population
Nitrogen Cycle 3
Pelagic Zone
Tundra Plants
15. 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
Tropical Rain Forest Animals
Competition Same Niche 3
Secondary Consumers
Second Law of Thermodynamics
16. 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
Pyramid of Mass
Intertidal Zone Population
Pioneer Organism
Deep-sea Organisms
17. 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
Second Law of Thermodynamics
Climate and weather
Temperate Deciduous Forest Animals
Marshes
18. Regiong beneatht he photic zone that receives no light
Pelagic Zone
Decomposer
Aphotic Zone
Substratum-pH
19. When one organism is benefited by the association and the other is not affected
Second Law of Thermodynamics
Nitrified
Pyramid of Energy
Commensalism
20. The vegetation that becomes dominant and stable after years of evolutiionary development
Saprophytes
Coimax Vegetatioin
Pyramid of Energy
Environment
21. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Grassland Biome
Ecological Succession
Substratum-Minerals
Climax Community
22. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Polar Region
Photic Zone
Aphotic Zone
Temperate Deciduous Forest Animals
23. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Grassland Animals
Temperate Coniferous Forest Biome
Poikilothermic (Cold Blooded)
Climate and weather
24. Polar bears - musk oxen - and arctic hens
Environmental Factors
Littoral Zone Populations
Temperate Coniferous Forest Biome
Thundra Animals
25. Rhododendrons and pines are more suited for growth in acid oil
Intertidal Zone Population
Substratum-pH
Climate and weather
Aquatic Biomes
26. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Material Cycles
Pyramid of Energy
Nitrogen Cycle 4
Conditions for stability in an Ecosystem
27. 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
Carbon Cycle 3
Marine Biomes
Communities
Decomposer
28. 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
Autotrophs
Biosphere
Carbon Cycle 2
Thundra Animals
29. 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
Nitrogen Cycle 4
Autotrophs
Aphotic Zone animals
Competition Same Niche 3
30. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Nature of Biomes
Niche
Marine Biomes
Competition Same Niche
31. 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
Parasitism
Tertiary Consumers
Intraspecific Interactions
Poikilothermic (Cold Blooded)
32. Conserve water actively
Coimax Vegetatioin
Desert Plants
Decomposer
Substratum-Minerals
33. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Ecosystem
Temperate Coniferous Plants
Aphotic Zone animals
Population
34. Determined by the same decisive factors-temperatures and rainfall
Competition Same Niche
Nature of Biomes
Photic Zone animals
Taiga Plants
35. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Symbionts
Community
Herbivores
Freshwater Biomes
36. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Biome
Taiga Animals
Ecology
Taiga Plants
37. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Food Web
Nature of Biomes
Littoral Zone
Intertidal Zone Population
38. Nekton and benthos - scavengers - and predators (fiercely competitive)
Aphotic Zone animals
Parasitism
Temperate Deciduous Forest Plants
Organism
39. Lichens and moss
Pelagic Zone
Tundra Plants
Aphotic Zone
Carbon Cycle 3
40. Only animal life and other heterotrophic life exists
Carbon Cycle 1
Nitrogen Cycle 3
Substratum-texture
Aphotic Zone
41. 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
Substratum (soil/rock)
Competition
Intertidal Zone
42. Composed of populations that are able to exist under the new conditions
Climate and weather
Pyramid of Mass
Substratum-Humus
Successive Communities
43. Any group of similar organisms that are capable of reproducing
Food Pyramids
Material Cycles
Species
Polar Region
44. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Ecological Succession
Nitrogen Cycle 4
Environmental Factors
Decomposer
45. The chief disruptive force
Littoral Zone Populations
Hypotonic
Predator-Prey relationship
Competition
46. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Dentrified
Mutualims
Competition Same Niche
Herbivores
47. The oceans
Competition
Carbon Cycle 1
Climax Community
Hydrosphere
48. Animals that eat both plants and animals
Omnivores
Deep-sea Organisms
Marshes
Ecological Succession
49. One that exerts control over the other species that are present
Conditions for stability in an Ecosystem
Grassland Biome
Poikilothermic (Cold Blooded)
Dominant Species
50. Algae - crabs - crustacea - and many different species of fish
Climate and weather
Littoral Zone Populations
Pyramid of Mass
Osmoregulation
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