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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. Adaptations for maintaining their internal osmolarity and conserving water
Tropical Rain Forest Animals
Hypotonic
Tertiary Consumers
Osmoregulation
2. Algae - crabs - crustacea - and many different species of fish
Food Web
Tundra Biome
Organism
Littoral Zone Populations
3. Consists of populations of different plants and animal species interacting with each other in a given environment
Second Law of Thermodynamics
Ecosystem
Lithosphere
Communities
4. Free-living organisms that feed on other living organisms
Environmental Factors
Predators
Conditions for stability in an Ecosystem
Tundra Plants
5. Includes climate - temperature - availability of light and water - and the local topology
Obligatory
Hypotonic
Rootlike holdfasts
Abiotic (Physical) Environment
6. Used to include only the population and not their physical environment
Climate and weather
Biotic Community
Temperate Coniferous Plants
Nitrified
7. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Dentrified
Competition Same Niche 3
Temperate Deciduous Forest Plants
Abiotic (Physical) Environment
8. Sunlit layer of the open sea extending to a depth of 250-600ft
Hypotonic
Nekton
Primary Consumers
Photic zone
9. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Primary Consumers
Autotrophs
Photic Zone animals
Intertidal Zone
10. The oceans
Hydrosphere
Mutualims
Aphotic Zone
Nitrogen Cycle 4
11. Distinct community in a geographic region
Physical Environment- Water
Food Pyramids
Biome
Littoral Zone Populations
12. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Obligatory
Polar Region
Biotic Community
Desert Biome
13. Determines water holding capacity
Community
Substratum-texture
Physical Environment- Water
Population
14. 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
Symbionts
Carbon Cycle 3
Environmental Factors
Aquatic Biomes
15. Affect the type of vegetation that can be supported
Marshes
Substratum-Minerals
Pyramid of Numbers
Desert Biome
16. 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
Competition Same Niche 3
Temperate Deciduous Forest Plants
Lithosphere
17. Nekton and benthos - scavengers - and predators (fiercely competitive)
Scavengers
Competition Same Niche
Aphotic Zone animals
Food Chain
18. The ultimate source of energy for all organisms
Physical Environment-Sunlight
Aquatic Biomes
Competition Same Niche
Communities
19. 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
Nitrogen cycle 1
Secondary Consumers
Grassland Biome
Marshes
20. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Desert animals
Tropical Rain Forest Plants
Heterotrophs
Tundra Plants
21. Includes the community and the environment and usually all five kingdoms
Carnivores
Nekton
Tropical Rain Forest Animals
Ecosystem
22. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Taiga Animals
Hydrosphere
Biome
Population
23. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Herbivores
Intertidal Zone
Biotic Environment
Biotic Community
24. Determine by the amount of decaying plant and animal life in the soil
Deep-sea Organisms
Substratum-Humus
Climate and weather
Grassland Animals
25. Animals that consume only plants or plant foods
Substratum-texture
Freshwater Biomes
Herbivores
Tertiary Consumers
26. 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
Epiphytes
Intraspecific Interactions
Nitrogen cycle 1
Desert animals
27. When one organism is benefited by the association and the other is not affected
Dentrified
Nitrogen Cycle 3
Ecology
Commensalism
28. Food chain is not a simple linear chain but an intricate web
Heterotrophs
Biosphere
Other Cycles
Food Web
29. Region typical of the open seas and can be divided into photic and aphotic zones
Pelagic Zone
Heterotrophs
Nitrogen Cycle 5
Mutualims
30. Links between oceans and land
Commensalism
Nitrogen Cycle 4
Omnivores
Marshes
31. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Hydrosphere
Biotic Community
Desert Plants
Marine Biomes
32. 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
Competition Same Niche 3
Hydrosphere
Nitrogen cycle 1
Saprophytes
33. Any group of similar organisms that are capable of reproducing
Marshes
Carbon Cycle 2
Species
Parasitism
34. When a parasite benefits at the expense of the host
Hemeothermic (Warm Blooded)
Parasitism
Biotic Community
Commensalism
35. Freshwater Biomes vs. Saltwater 1: Freshwater is _______________ which results in the passage of water into the cell. Freshwater organisms have homeostatic mechanisms to maintain water balance by the regular removal of the excess water. these include
Intertidal Zone
Hypotonic
Producers
Biotic Environment
36. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Climate and weather
Temperate Deciduous Forest Biome
Tropical Rain Forest Animals
Littoral Zone
37. 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
Commensalism
Freshwater Biomes
Second Law of Thermodynamics
Climate and weather
38. Group of organisms of the same species living together in a given location
Organism
Population
Temperate Deciduous Forest Biome
Lithosphere
39. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Polar Region
Nitrogen Cycle 3
Lithosphere
Predator-Prey relationship
40. 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
Pyramid of Energy
Tropical Rain Forest Biome
Photic zone
Aphotic Zone
41. Encompasses all that is external to the organism and is necessary for its existence
Population
Environment
Parasitism
Scavengers
42. Animals that consume green plants (herbivores)
Primary Consumers
Physical Environment- Water
Nature of Biomes
Nitrogen Cycle 2
43. Determines the nature of plant and animal life in the soil
Population
Freshwater Biomes
Littoral Zone
Substratum (soil/rock)
44. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Biome
Hypotonic
Marine Biomes
45. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Predators
Desert animals
Scavengers
Coimax Vegetatioin
46. Without a constant input of energy from the sun - an ecosystem would soon run down - as food is transferred from one level of the food chain to the next - a transfer of energy occurs
Desert Plants
Population
Nature of Biomes
Food Pyramids
47. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Tropical Rain Forest Animals
Environmental Factors
Biosphere
Competition Same Niche 2
48. 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
Tertiary Consumers
Tundra Biome
Aphotic Zone
49. The chief disruptive force
Nitrogen cycle 1
Competition
Carbon Cycle 3
Littoral Zone Populations
50. One or both organisms can't survive without the other
Nature of Biomes
Species
Aphotic Zone
Obligatory