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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.
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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. 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
Benthos
Hemeothermic (Warm Blooded)
Grassland Biome
Ecology
2. 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
Hypotonic
Competition Same Niche
Nitrogen Cycle 2
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
Niche
Conditions for stability in an Ecosystem
Substratum-pH
Hemeothermic (Warm Blooded)
4. One or both organisms can't survive without the other
Littoral Zone Populations
Marine Biomes
Commensalism
Obligatory
5. Any group of similar organisms that are capable of reproducing
Carbon Cycle 2
Nitrogen
Intertidal Zone Population
Species
6. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Ecology
Temperate Deciduous Forest Plants
Competition Same Niche
Lithosphere
7. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Nature of Biomes
Photic Zone animals
Temperate Deciduous Forest Plants
Desert animals
8. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Grassland Biome
Predators
Food Chain
Heterotrophs
9. The study of interactions between organisms and their environment
Poikilothermic (Cold Blooded)
Nekton
Climate and weather
Ecology
10. When one organism is benefited by the association and the other is not affected
Intertidal Zone Population
Niche
Competition Same Niche 2
Commensalism
11. Nekton and benthos - scavengers - and predators (fiercely competitive)
Aphotic Zone animals
Food Chain
Carbon Cycle 3
Producers
12. Includes the community and the environment and usually all five kingdoms
Desert animals
Ecosystem
Niche
Second Law of Thermodynamics
13. The oceans
Lithosphere
Hydrosphere
Photic Zone animals
Second Law of Thermodynamics
14. Animals that consume only plants or plant foods
Herbivores
Primary Consumers
Climax Community
Coimax Vegetatioin
15. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Parasitism
Dentrified
Pelagic Zone
Photic Zone
16. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Temperate Deciduous Forest Biome
Nitrogen cycle 1
Coimax Vegetatioin
17. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Physical Environment- Water
Dentrified
Grassland Animals
Community
18. Rock and soil surface
Environment
Scavengers
Lithosphere
Tropical Rain Forest Biome
19. One that exerts control over the other species that are present
Mutualims
Material Cycles
Dominant Species
Cohesive Force
20. 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
Cohesive Force
Temperate Coniferous Forest Biome
Second Law of Thermodynamics
Population
21. The major component of the internal environment of all living things
Biotic Environment
Ecological Succession
Physical Environment- Water
Pyramid of Mass
22. Algae - crabs - crustacea - and many different species of fish
Nitrogen Cycle 4
Climax Community
Littoral Zone Populations
Temperate Coniferous Plants
23. 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
Grassland Animals
Physical Environment-Sunlight
Hypotonic
Successive Communities
24. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Biotic Environment
Scavengers
Tropical Rain Forest Plants
Aquatic Biomes
25. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Osmoregulation
Carnivores
Climax Community
Carbon Cycle 1
26. 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
Biome
Temperate Coniferous Plants
Pyramid of Mass
Saprophytes
27. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Food Web
Competition
Nitrogen Cycle 2
Omnivores
28. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Substratum-pH
Littoral Zone
Community
Freshwater Biomes
29. Encompasses all that is external to the organism and is necessary for its existence
Nitrogen
Environment
Pyramid of Energy
Hypotonic
30. The chief disruptive force
Polar Region
Taiga Biome
Competition
Nitrogen
31. Region typical of the open seas and can be divided into photic and aphotic zones
Other Cycles
Carnivores
Conditions for stability in an Ecosystem
Pelagic Zone
32. Vegetation such as vines and eppiphytes
Physical Environment-Sunlight
Tropical Rain Forest Plants
Temperate Coniferous Forest Biome
Nitrogen Cycle 3
33. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Organism
Climax Community
Heterotrophs
Ecological Succession
34. Two species may rapidly evolve in divergent directions under the strong selection pressure resulting from intense competition. thus - the two species would rapidly evolve greater differences in their niches
Intraspecific Interactions
Community
Competition Same Niche 3
Deep-sea Organisms
35. Conserve water actively
Ecosystem
Photic zone
Desert Plants
Substratum-Minerals
36. Integrated system of species that are dependent upon one another for survival
Physical Environment-Temperature
Community
Obligatory
Ecological Succession
37. One species may be competitively superior in some regions - and the other may be superior in other regions under different environmental conditions. this would result in the elimination of one species in some places and the other in other places
Photic Zone
Photic zone
Environment
Competition Same Niche 2
38. Animals that feed on secondary consumer
Parasitism
Aphotic Zone animals
Temperate Coniferous Plants
Tertiary Consumers
39. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Competition Same Niche 3
Photic Zone animals
Littoral Zone Populations
Ecological Succession
40. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Nitrified
Carnivores
Heterotrophs
Nature of Biomes
41. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Ecological Succession
Deep-sea Organisms
Intertidal Zone
Substratum-pH
42. Determined by the same decisive factors-temperatures and rainfall
Nature of Biomes
Deep-sea Organisms
Aphotic Zone animals
Other Cycles
43. Lichens and moss
Substratum-Minerals
Tundra Plants
Carbon Cycle 3
Ecology
44. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Deep-sea Organisms
Littoral Zone
Intertidal Zone Population
Ecosystem
45. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Saprophytes
Sere
Nitrogen
Successive Communities
46. Animals that eat both plants and animals
Photic Zone animals
Conditions for stability in an Ecosystem
Aphotic Zone
Omnivores
47. Include reproduction and protection from predators and destructive weather
Competition Same Niche
Dentrified
Cohesive Force
Competition Same Niche 2
48. When a parasite benefits at the expense of the host
Autotrophs
Omnivores
Desert animals
Parasitism
49. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Poikilothermic (Cold Blooded)
Community
Physical Environment- Water
Desert Plants
50. First to resettle a virgin area
Pioneer Organism
Competition
Biome
Aphotic Zone animals
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