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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. 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
Lithosphere
Grassland Biome
Competition Same Niche 2
Littoral Zone Populations
2. Animals that feed on secondary consumer
Material Cycles
Tertiary Consumers
Dominant Species
Climax Community
3. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Aquatic Biomes
Environmental Factors
Competition
Intertidal Zone
4. Rhododendrons and pines are more suited for growth in acid oil
Tropical Rain Forest Biome
Substratum-pH
Photic Zone
Predators
5. 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
Intertidal Zone Population
Tropical Rain Forest Plants
Autotrophs
Aquatic Biomes
6. 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
Competition
Benthos
Nitrogen Cycle 4
Tundra Biome
7. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Nekton
Freshwater Biomes
Pyramid of Mass
Ecosystem
8. Rock and soil surface
Food Pyramids
Temperate Coniferous Plants
Lithosphere
Ecology
9. First to resettle a virgin area
Pioneer Organism
Physical Environment-Temperature
Environmental Factors
Nitrogen
10. 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
Ecosystem
Parasitism
Competition Same Niche 2
Photic Zone
11. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Omnivores
Scavengers
Nitrogen Cycle 2
Biotic Environment
12. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Littoral Zone Populations
Cohesive Force
Heterotrophs
Nitrogen Cycle 3
13. Animals that consume primary consumers (carnivores)
Conditions for stability in an Ecosystem
Secondary Consumers
Competition Same Niche 3
Predators
14. 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
Substratum-Minerals
Biotic Community
Carbon Cycle 1
Epiphytes
15. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Climax Community
Intraspecific Interactions
Ecological Succession
Dominant Species
16. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Secondary Consumers
Physical Environment-Temperature
Desert Biome
Desert Plants
17. Include reproduction and protection from predators and destructive weather
Cohesive Force
Food Chain
Predators
Benthos
18. Rivers - lakes - ponds - and marshes
Carbon Cycle 1
Sere
Hypotonic
Freshwater Biomes
19. 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
Competition Same Niche 3
Ecosystem
Nature of Biomes
Population
20. When one organism is benefited by the association and the other is not affected
Tropical Rain Forest Animals
Environmental Factors
Commensalism
Predator-Prey relationship
21. 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
Food Pyramids
Climate and weather
Successive Communities
Carnivores
22. Needs constant energy source and cycling of materials between the living system
Nature of Biomes
Conditions for stability in an Ecosystem
Environmental Factors
Ecology
23. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Aquatic Biomes
Temperate Deciduous Forest Animals
Ecological Succession
Commensalism
24. One or both organisms can't survive without the other
Community
Obligatory
Cohesive Force
Nitrogen Cycle 5
25. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Nitrified
Competition Same Niche 2
Organism
Littoral Zone
26. Symbiotic relationship from which both organisms derive some benefit
Deep-sea Organisms
Mutualims
Nitrogen Cycle 5
Carnivores
27. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Marine Biomes
Temperate Deciduous Forest Animals
Nitrogen Cycle 4
Food Chain
28. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Commensalism
Temperate Coniferous Plants
Nitrogen cycle 1
Heterotrophs
29. Animals that eat both plants and animals
Osmoregulation
Nitrogen Cycle 3
Omnivores
Herbivores
30. 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
Food Pyramids
Hypotonic
Biotic Environment
Tundra Biome
31. Composed of populations that are able to exist under the new conditions
Successive Communities
Pelagic Zone
Nitrogen Cycle 2
Substratum-Humus
32. The major component of the internal environment of all living things
Physical Environment- Water
Biotic Community
Biosphere
Nitrogen cycle 1
33. Integrated system of species that are dependent upon one another for survival
Cohesive Force
Temperate Deciduous Forest Plants
Community
Communities
34. Determines the nature of plant and animal life in the soil
Substratum (soil/rock)
Nitrogen Cycle 5
Nitrogen cycle 1
Intertidal Zone
35. Consists of populations of different plants and animal species interacting with each other in a given environment
Saprophytes
Communities
Pyramid of Energy
Herbivores
36. Deer - fox - woodchuck - and squirrel
Temperate Deciduous Forest Animals
Physical Environment-Sunlight
Competition Same Niche
Saprophytes
37. Polar bears - musk oxen - and arctic hens
Food Web
Nitrogen cycle 1
Predator-Prey relationship
Thundra Animals
38. Determines water holding capacity
Environmental Factors
Substratum-texture
Nature of Biomes
Nitrogen Cycle 4
39. Determined by the same decisive factors-temperatures and rainfall
Poikilothermic (Cold Blooded)
Biotic Community
Species
Nature of Biomes
40. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Temperate Coniferous Forest Biome
Pioneer Organism
Food Chain
41. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Nature of Biomes
Dominant Species
Aphotic Zone
Temperate Deciduous Forest Plants
42. Includes climate - temperature - availability of light and water - and the local topology
Carnivores
Tropical Rain Forest Biome
Physical Environment- Water
Abiotic (Physical) Environment
43. 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
Environment
Photic Zone
Tundra Biome
Ecology
44. Conserve water actively
Desert Plants
Nitrogen cycle 1
Nature of Biomes
Predator-Prey relationship
45. Affect the type of vegetation that can be supported
Carbon Cycle 2
Substratum-Minerals
Physical Environment- Water
Grassland Animals
46. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Taiga Plants
Secondary Consumers
Pyramid of Numbers
Benthos
47. 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
Pyramid of Mass
Substratum-Humus
Hydrosphere
Nitrogen Cycle 2
48. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Tropical Rain Forest Animals
Biosphere
Biotic Community
Pioneer Organism
49. One species may be competitively superior to the other and drive the second to extinction
Aquatic Biomes
Competition Same Niche
Nitrogen
Coimax Vegetatioin
50. Crawling and sessile organsms
Benthos
Carbon Cycle 2
Marshes
Nature of Biomes