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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. One that exerts control over the other species that are present
Nekton
Physical Environment-Sunlight
Dominant Species
Ecological Succession
2. When a parasite benefits at the expense of the host
Competition Same Niche 3
Herbivores
Polar Region
Parasitism
3. Determine by the amount of decaying plant and animal life in the soil
Substratum (soil/rock)
Substratum-Humus
Lithosphere
Aquatic Biomes
4. Community in an ecological succession is identified by a dominant species
Sere
Abiotic (Physical) Environment
Producers
Desert animals
5. Composed of populations that are able to exist under the new conditions
Substratum-texture
Physical Environment-Temperature
Tundra Biome
Successive Communities
6. 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
Intertidal Zone Population
Intraspecific Interactions
Grassland Biome
Desert animals
7. Crawling and sessile organsms
Tropical Rain Forest Plants
Benthos
Organism
Tropical Rain Forest Animals
8. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Nature of Biomes
Grassland Animals
Physical Environment-Temperature
Nitrogen Cycle 3
9. Encompasses all that is external to the organism and is necessary for its existence
Organism
Aquatic Biomes
Species
Environment
10. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Tropical Rain Forest Biome
Nitrified
Heterotrophs
Carbon Cycle 1
11. First to resettle a virgin area
Pioneer Organism
Freshwater Biomes
Ecosystem
Ecological Succession
12. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Substratum (soil/rock)
Temperate Deciduous Forest Biome
Heterotrophs
Biotic Community
13. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Freshwater Biomes
Substratum-Minerals
Symbionts
Pyramid of Mass
14. 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
Aphotic Zone
Intraspecific Interactions
Nekton
Nitrogen cycle 1
15. Adaptations for maintaining their internal osmolarity and conserving water
Predator-Prey relationship
Organism
Osmoregulation
Benthos
16. Polar bears - musk oxen - and arctic hens
Climate and weather
Temperate Deciduous Forest Plants
Thundra Animals
Nitrogen cycle 1
17. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Nitrified
Marine Biomes
Nitrogen Cycle 3
Desert animals
18. Rivers - lakes - ponds - and marshes
Nitrogen Cycle 2
Conditions for stability in an Ecosystem
Freshwater Biomes
Deep-sea Organisms
19. Receive less than ten inches of rain each year; the rain is concentrated within a few heavy cloudbursts -ex: Sahara in Africa and Gobi in Asia
Taiga Plants
Nitrogen Cycle 5
Desert Biome
Carbon Cycle 1
20. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Hemeothermic (Warm Blooded)
Grassland Animals
Biotic Community
Carbon Cycle 2
21. Animals that eat both plants and animals
Competition Same Niche
Omnivores
Cohesive Force
Scavengers
22. Free-living organisms that feed on other living organisms
Material Cycles
Marshes
Food Web
Predators
23. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Organism
Pelagic Zone
Temperate Deciduous Forest Plants
Competition
24. 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
Aphotic Zone
Substratum-pH
Carbon Cycle 1
Climax Community
25. Distinct community in a geographic region
Thundra Animals
Producers
Pyramid of Numbers
Biome
26. 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
Food Web
Second Law of Thermodynamics
Deep-sea Organisms
Aphotic Zone
27. Two fates await the ammonia (NH3). some are nitrified or dentrified
Nitrogen Cycle 5
Photic zone
Intertidal Zone Population
Nitrogen Cycle 4
28. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Substratum-Humus
Producers
Decomposer
Poikilothermic (Cold Blooded)
29. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Carbon Cycle 1
Environmental Factors
Species
Grassland Animals
30. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Pyramid of Energy
Substratum (soil/rock)
Desert Biome
Nitrogen Cycle 3
31. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Herbivores
Pyramid of Numbers
Littoral Zone Populations
Environment
32. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Communities
Carbon Cycle 2
Other Cycles
Deep-sea Organisms
33. 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
Population
Predators
Saprophytes
34. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Pyramid of Numbers
Material Cycles
Temperate Deciduous Forest Plants
Niche
35. Group of organisms of the same species living together in a given location
Population
Nitrogen Cycle 4
Photic Zone animals
Physical Environment- Water
36. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Food Web
Climax Community
Physical Environment-Sunlight
Species
37. Vegetation such as vines and eppiphytes
Competition Same Niche 2
Competition
Tropical Rain Forest Plants
Substratum (soil/rock)
38. Rhododendrons and pines are more suited for growth in acid oil
Grassland Animals
Carbon Cycle 3
Pioneer Organism
Substratum-pH
39. Integrated system of species that are dependent upon one another for survival
Physical Environment- Water
Tundra Plants
Community
Communities
40. Conserve water actively
Lithosphere
Tropical Rain Forest Biome
Population
Desert Plants
41. When one organism is benefited by the association and the other is not affected
Commensalism
Competition
Primary Consumers
Obligatory
42. Animals that consume only plants or plant foods
Herbivores
Aphotic Zone animals
Tundra Biome
Second Law of Thermodynamics
43. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Niche
Scavengers
Temperate Coniferous Plants
44. Determines water holding capacity
Substratum-texture
Competition Same Niche
Desert Plants
Substratum-Minerals
45. Nekton and benthos - scavengers - and predators (fiercely competitive)
Food Chain
Nitrified
Aphotic Zone animals
Pioneer Organism
46. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Sere
Ecological Succession
Epiphytes
Successive Communities
47. Deer - fox - woodchuck - and squirrel
Temperate Deciduous Forest Animals
Sere
Aquatic Biomes
Substratum-Humus
48. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Desert Biome
Marine Biomes
Nekton
Polar Region
49. Animals that consume dead animals
Carbon Cycle 3
Scavengers
Climax Community
Commensalism
50. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Temperate Deciduous Forest Plants
Littoral Zone Populations
Hypotonic
Substratum-Humus