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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. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Photic Zone
Carbon Cycle 2
Population
Substratum (soil/rock)
2. Determine by the amount of decaying plant and animal life in the soil
Nitrogen Cycle 5
Conditions for stability in an Ecosystem
Substratum-Humus
Niche
3. Consists of populations of different plants and animal species interacting with each other in a given environment
Communities
Food Web
Carbon Cycle 3
Climate and weather
4. 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
Climate and weather
Predator-Prey relationship
Competition Same Niche 3
Carnivores
5. Freshwater Biomes vs. Saltwater 3: Freshwater biomes - except very large lakes - are affected by variations in _________. temperature of freshwater bodies varies considerably; they may freeze or dry up - and mud from their floors may be stirred up by
Nitrogen Cycle 3
Temperate Coniferous Forest Biome
Climate and weather
Hydrosphere
6. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Littoral Zone Populations
Carbon Cycle 3
Photic Zone
Hemeothermic (Warm Blooded)
7. Links between oceans and land
Obligatory
Scavengers
Nitrogen Cycle 3
Marshes
8. Nekton and benthos - scavengers - and predators (fiercely competitive)
Deep-sea Organisms
Littoral Zone
Epiphytes
Aphotic Zone animals
9. Lichens and moss
Photic Zone
Tropical Rain Forest Animals
Dominant Species
Tundra Plants
10. Animals that eat both plants and animals
Communities
Omnivores
Nitrogen Cycle 2
Temperate Deciduous Forest Animals
11. Include saprophytic organisms and organisms of decay
Decomposer
Biome
Tropical Rain Forest Biome
Physical Environment-Sunlight
12. Polar bears - musk oxen - and arctic hens
Desert animals
Thundra Animals
Saprophytes
Food Pyramids
13. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Hypotonic
Photic zone
Intertidal Zone Population
Cohesive Force
14. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Hypotonic
Aquatic Biomes
Organism
Grassland Animals
15. Includes climate - temperature - availability of light and water - and the local topology
Freshwater Biomes
Substratum-texture
Abiotic (Physical) Environment
Biome
16. Community in an ecological succession is identified by a dominant species
Photic zone
Sere
Nitrogen Cycle 5
Communities
17. 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
Biosphere
Niche
Lithosphere
Substratum-Humus
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
Carnivores
Cohesive Force
Organism
Tropical Rain Forest Animals
19. Region typical of the open seas and can be divided into photic and aphotic zones
Communities
Carnivores
Food Chain
Pelagic Zone
20. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Polar Region
Littoral Zone
Grassland Animals
Littoral Zone Populations
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
Tropical Rain Forest Plants
Autotrophs
Physical Environment- Water
Carbon Cycle 1
22. Rivers - lakes - ponds - and marshes
Marshes
Aphotic Zone
Freshwater Biomes
Nitrogen Cycle 2
23. The study of interactions between organisms and their environment
Desert animals
Secondary Consumers
Ecology
Predator-Prey relationship
24. Recycle water - oxygen - and phosphorus
Other Cycles
Biome
Temperate Coniferous Plants
Nitrogen Cycle 4
25. Rhododendrons and pines are more suited for growth in acid oil
Temperate Coniferous Forest Biome
Dentrified
Biosphere
Substratum-pH
26. First to resettle a virgin area
Dominant Species
Coimax Vegetatioin
Environmental Factors
Pioneer Organism
27. Receive less rainfall than the temperate forests - have long - cold winters - and are inhabited by single coniferous tree-the spruce -extreme northern parts of Canada and Russia
Taiga Biome
Temperate Coniferous Plants
Deep-sea Organisms
Tropical Rain Forest Animals
28. 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
Epiphytes
Carbon Cycle 3
Nitrogen Cycle 3
Aphotic Zone animals
29. Affect the type of vegetation that can be supported
Taiga Animals
Temperate Deciduous Forest Plants
Tropical Rain Forest Biome
Substratum-Minerals
30. Forest floors contain moss and lichens
Freshwater Biomes
Hydrosphere
Taiga Plants
Competition Same Niche
31. Includes the community and the environment and usually all five kingdoms
Ecosystem
Species
Nitrogen Cycle 2
Competition Same Niche 2
32. Organisms that manufacture their own food
Pioneer Organism
Sere
Autotrophs
Hemeothermic (Warm Blooded)
33. Animals that consume only plants or plant foods
Herbivores
Desert animals
Substratum (soil/rock)
Dentrified
34. Conserve water actively
Competition Same Niche 2
Desert Plants
Population
Food Web
35. One or both organisms can't survive without the other
Substratum-pH
Obligatory
Scavengers
Temperate Deciduous Forest Plants
36. Sunlit layer of the open sea extending to a depth of 250-600ft
Competition Same Niche 2
Nitrified
Photic zone
Carbon Cycle 1
37. Any group of similar organisms that are capable of reproducing
Omnivores
Tropical Rain Forest Animals
Species
Nitrogen
38. When one organism is benefited by the association and the other is not affected
Carbon Cycle 1
Tundra Plants
Intertidal Zone
Commensalism
39. 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
Carnivores
Temperate Deciduous Forest Animals
Dentrified
Pyramid of Mass
40. 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
Rootlike holdfasts
Ecosystem
Saprophytes
Taiga Animals
41. The chief disruptive force
Competition
Biosphere
Communities
Pyramid of Mass
42. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Marine Biomes
Organism
Carbon Cycle 1
Substratum-Humus
43. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Ecological Succession
Nitrogen cycle 1
Desert animals
Taiga Animals
44. Include reproduction and protection from predators and destructive weather
Dominant Species
Nitrogen Cycle 4
Cohesive Force
Carnivores
45. 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
Littoral Zone Populations
Lithosphere
Competition Same Niche 2
Carbon Cycle 2
46. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Intraspecific Interactions
Abiotic (Physical) Environment
Predator-Prey relationship
Carnivores
47. 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
Herbivores
Nitrogen cycle 1
Pioneer Organism
Deep-sea Organisms
48. 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
Tundra Biome
Substratum-Minerals
Nitrogen Cycle 5
Biotic Environment
49. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Heterotrophs
Poikilothermic (Cold Blooded)
Grassland Animals
Temperate Coniferous Plants
50. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Pyramid of Numbers
Biotic Community
Ecosystem
Polar Region