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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. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Aphotic Zone
Epiphytes
Intertidal Zone Population
Climax Community
2. Determines the nature of plant and animal life in the soil
Substratum (soil/rock)
Photic zone
Substratum-Humus
Tundra Plants
3. 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
Tropical Rain Forest Plants
Hemeothermic (Warm Blooded)
Niche
Substratum-pH
4. 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
Sere
Food Chain
Scavengers
Saprophytes
5. Regiong beneatht he photic zone that receives no light
Producers
Aphotic Zone
Environment
Scavengers
6. When a parasite benefits at the expense of the host
Temperate Deciduous Forest Animals
Parasitism
Marine Biomes
Hydrosphere
7. Deer - fox - woodchuck - and squirrel
Food Chain
Biotic Environment
Temperate Deciduous Forest Animals
Aphotic Zone
8. Consists of populations of different plants and animal species interacting with each other in a given environment
Communities
Polar Region
Heterotrophs
Tropical Rain Forest Biome
9. Rhododendrons and pines are more suited for growth in acid oil
Competition Same Niche
Dentrified
Substratum-pH
Primary Consumers
10. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Competition Same Niche
Marine Biomes
Pyramid of Mass
Intertidal Zone Population
11. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Dentrified
Nitrogen cycle 1
Thundra Animals
Substratum (soil/rock)
12. More than 70% of earth -plants have little controlling influence in communities -most stable ecosystems; the conditions affecting temperature - amount of available oxygen and cabon dioxide - and amount of suspended or dissolve materials are very stab
Aquatic Biomes
Communities
Desert Plants
Physical Environment- Water
13. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Tropical Rain Forest Biome
Ecological Succession
Desert Biome
Organism
14. Vegetation such as vines and eppiphytes
Epiphytes
Tropical Rain Forest Plants
Tropical Rain Forest Biome
Food Pyramids
15. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Symbionts
Marine Biomes
Nitrogen Cycle 2
16. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Benthos
Tropical Rain Forest Biome
Intertidal Zone
Producers
17. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Symbionts
Competition Same Niche 2
Nature of Biomes
Cohesive Force
18. 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
Marine Biomes
Organism
Tundra Biome
Carnivores
19. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Nekton
Conditions for stability in an Ecosystem
Temperate Deciduous Forest Biome
Littoral Zone
20. The major component of the internal environment of all living things
Physical Environment- Water
Dentrified
Coimax Vegetatioin
Lithosphere
21. 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
Substratum-Humus
Temperate Deciduous Forest Biome
Nitrogen Cycle 3
Second Law of Thermodynamics
22. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Tundra Plants
Littoral Zone Populations
Food Chain
Parasitism
23. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Nitrogen cycle 1
Taiga Plants
Aphotic Zone
Nitrogen
24. 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
Tropical Rain Forest Animals
Cohesive Force
Tundra Plants
25. Determines water holding capacity
Substratum-texture
Climax Community
Pyramid of Numbers
Taiga Plants
26. Treeless - frozen plain found between the taiga lands and the northern ice sheets - very short summer and thus a very short growing season during which time the ground becomes wet and marshy
Photic Zone animals
Tundra Biome
Community
Taiga Plants
27. Animals that consume primary consumers (carnivores)
Temperate Deciduous Forest Plants
Hydrosphere
Secondary Consumers
Marshes
28. Distinct community in a geographic region
Biome
Carnivores
Climax Community
Polar Region
29. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Nitrified
Poikilothermic (Cold Blooded)
Community
Desert animals
30. Animals that feed on secondary consumer
Mutualims
Tertiary Consumers
Rootlike holdfasts
Pyramid of Energy
31. 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
Heterotrophs
Carbon Cycle 2
Nitrogen
Substratum-pH
32. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Nitrogen Cycle 3
Aquatic Biomes
Food Chain
Organism
33. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Desert Biome
Littoral Zone
Marshes
Heterotrophs
34. Free-living organisms that feed on other living organisms
Environmental Factors
Predators
Temperate Deciduous Forest Animals
Littoral Zone
35. 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
Carbon Cycle 1
Taiga Biome
Substratum-texture
Intraspecific Interactions
36. Determine by the amount of decaying plant and animal life in the soil
Symbionts
Substratum-Humus
Biotic Environment
Littoral Zone Populations
37. Developed long legs and many are hoofed
Grassland Animals
Marine Biomes
Temperate Coniferous Forest Biome
Temperate Deciduous Forest Animals
38. 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
Ecology
Marshes
Tropical Rain Forest Animals
Rootlike holdfasts
39. 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
Carbon Cycle 1
Temperate Coniferous Plants
Dentrified
Competition Same Niche 2
40. The chief disruptive force
Temperate Coniferous Plants
Competition
Deep-sea Organisms
Heterotrophs
41. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Biotic Environment
Tropical Rain Forest Plants
Photic Zone animals
Cohesive Force
42. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Predators
Grassland Biome
Littoral Zone
Tertiary Consumers
43. Nekton and benthos - scavengers - and predators (fiercely competitive)
Rootlike holdfasts
Aphotic Zone animals
Population
Physical Environment- Water
44. Group of organisms of the same species living together in a given location
Population
Pyramid of Numbers
Grassland Biome
Abiotic (Physical) Environment
45. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Carbon Cycle 1
Tropical Rain Forest Animals
Hemeothermic (Warm Blooded)
46. 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
Omnivores
Tundra Biome
Pelagic Zone
Carbon Cycle 3
47. Polar bears - musk oxen - and arctic hens
Autotrophs
Parasitism
Thundra Animals
Nitrogen cycle 1
48. One species may be competitively superior to the other and drive the second to extinction
Second Law of Thermodynamics
Deep-sea Organisms
Competition Same Niche
Grassland Biome
49. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Grassland Animals
Nitrogen Cycle 3
Thundra Animals
Temperate Coniferous Plants
50. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Decomposer
Species
Competition Same Niche 2
Photic Zone animals