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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. 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
Competition Same Niche 3
Climate and weather
Parasitism
Second Law of Thermodynamics
2. Food chain is not a simple linear chain but an intricate web
Intertidal Zone
Nekton
Marshes
Food Web
3. Forest floors contain moss and lichens
Taiga Plants
Tertiary Consumers
Freshwater Biomes
Second Law of Thermodynamics
4. Two fates await the ammonia (NH3). some are nitrified or dentrified
Ecology
Carbon Cycle 2
Freshwater Biomes
Nitrogen Cycle 5
5. 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
Substratum-Humus
Pyramid of Mass
Parasitism
Nekton
6. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Osmoregulation
Intraspecific Interactions
Species
Nekton
7. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Cohesive Force
Aphotic Zone
Grassland Animals
Biosphere
8. When a parasite benefits at the expense of the host
Parasitism
Autotrophs
Population
Hydrosphere
9. One that exerts control over the other species that are present
Hypotonic
Omnivores
Pioneer Organism
Dominant Species
10. Rhododendrons and pines are more suited for growth in acid oil
Substratum-pH
Epiphytes
Biosphere
Marine Biomes
11. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Nature of Biomes
Carbon Cycle 3
Herbivores
Food Chain
12. Recycle water - oxygen - and phosphorus
Sere
Other Cycles
Primary Consumers
Physical Environment-Sunlight
13. One species may be competitively superior to the other and drive the second to extinction
Tertiary Consumers
Desert animals
Competition
Competition Same Niche
14. Animals that eat both plants and animals
Environmental Factors
Ecosystem
Omnivores
Dentrified
15. 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
Freshwater Biomes
Predator-Prey relationship
Mutualims
Nitrogen cycle 1
16. Animals that consume green plants (herbivores)
Temperate Deciduous Forest Animals
Environmental Factors
Primary Consumers
Dominant Species
17. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Second Law of Thermodynamics
Coimax Vegetatioin
Other Cycles
18. 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
Temperate Deciduous Forest Biome
Nature of Biomes
Nitrogen Cycle 4
Temperate Deciduous Forest Animals
19. When one organism is benefited by the association and the other is not affected
Osmoregulation
Tundra Plants
Pioneer Organism
Commensalism
20. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Epiphytes
Tundra Plants
Competition Same Niche 3
Aphotic Zone animals
21. 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
Nitrogen Cycle 2
Decomposer
Carbon Cycle 1
Physical Environment-Temperature
22. 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
Pyramid of Numbers
Carnivores
Food Chain
Taiga Animals
23. 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
Carbon Cycle 1
Omnivores
Heterotrophs
24. 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
Successive Communities
Tropical Rain Forest Plants
Hemeothermic (Warm Blooded)
Pyramid of Energy
25. Distinct community in a geographic region
Grassland Biome
Biome
Species
Substratum-pH
26. Cold - dry - and inhabited by fir - pine - and spruce trees -much vegetation has evolved adaptations for water conservation such as needle-shaped leaves -Extreme Northern Part of the US and in Southern Canada
Dominant Species
Temperate Coniferous Forest Biome
Poikilothermic (Cold Blooded)
Biotic Community
27. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Climax Community
Lithosphere
Organism
Nitrogen Cycle 3
28. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Temperate Deciduous Forest Biome
Community
Freshwater Biomes
Biosphere
29. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Competition Same Niche 2
Aquatic Biomes
Ecological Succession
Poikilothermic (Cold Blooded)
30. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Poikilothermic (Cold Blooded)
Environmental Factors
Biome
Competition
31. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Producers
Pelagic Zone
Food Web
Tundra Plants
32. Used to include only the population and not their physical environment
Temperate Deciduous Forest Biome
Biotic Environment
Biotic Community
Dominant Species
33. Needs constant energy source and cycling of materials between the living system
Communities
Second Law of Thermodynamics
Obligatory
Conditions for stability in an Ecosystem
34. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Polar Region
Successive Communities
Temperate Coniferous Plants
Nitrogen Cycle 2
35. 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
Rootlike holdfasts
Intertidal Zone
Successive Communities
Decomposer
36. The major component of the internal environment of all living things
Pelagic Zone
Physical Environment- Water
Community
Pioneer Organism
37. The chief disruptive force
Competition
Predators
Pyramid of Numbers
Nekton
38. Include reproduction and protection from predators and destructive weather
Taiga Plants
Secondary Consumers
Substratum-texture
Cohesive Force
39. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Physical Environment-Temperature
Physical Environment- Water
Pyramid of Numbers
Pyramid of Energy
40. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Organism
Temperate Deciduous Forest Plants
Niche
41. Organisms that manufacture their own food
Competition Same Niche 3
Biosphere
Autotrophs
Dentrified
42. Developed long legs and many are hoofed
Grassland Animals
Competition Same Niche 3
Tropical Rain Forest Plants
Carbon Cycle 3
43. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Hemeothermic (Warm Blooded)
Obligatory
Nitrogen Cycle 4
Substratum-pH
44. 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
Food Web
Carbon Cycle 3
Littoral Zone Populations
Temperate Deciduous Forest Animals
45. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Temperate Coniferous Plants
Nitrogen
Taiga Plants
Tundra Biome
46. Affect the type of vegetation that can be supported
Cohesive Force
Substratum-Minerals
Intraspecific Interactions
Pyramid of Mass
47. The oceans
Hydrosphere
Littoral Zone
Physical Environment-Sunlight
Climate and weather
48. Only animal life and other heterotrophic life exists
Coimax Vegetatioin
Aphotic Zone
Marine Biomes
Biosphere
49. 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
Littoral Zone
Obligatory
Intraspecific Interactions
Tropical Rain Forest Animals
50. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Substratum-pH
Nitrogen Cycle 2
Desert animals
Scavengers