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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.
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. 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
Competition
Nitrogen
Food Web
2. 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
Benthos
Poikilothermic (Cold Blooded)
Competition Same Niche 2
Second Law of Thermodynamics
3. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Climax Community
Population
Autotrophs
Photic zone
4. Rhododendrons and pines are more suited for growth in acid oil
Substratum-pH
Intertidal Zone
Tundra Biome
Competition Same Niche 3
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
Desert Plants
Herbivores
Photic Zone
Climate and weather
6. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Climax Community
Aphotic Zone
Intertidal Zone
Hemeothermic (Warm Blooded)
7. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Poikilothermic (Cold Blooded)
Nature of Biomes
Biotic Community
Desert Plants
8. 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
Tundra Plants
Organism
Second Law of Thermodynamics
Saprophytes
9. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Dentrified
Marshes
Epiphytes
Biotic Environment
10. 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
Tundra Biome
Herbivores
Pyramid of Mass
Decomposer
11. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Autotrophs
Material Cycles
Coimax Vegetatioin
Climate and weather
12. Rivers - lakes - ponds - and marshes
Freshwater Biomes
Ecological Succession
Osmoregulation
Commensalism
13. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Rootlike holdfasts
Benthos
Food Web
Nitrified
14. One species may be competitively superior to the other and drive the second to extinction
Competition Same Niche
Intertidal Zone Population
Pelagic Zone
Nitrified
15. 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
Sere
Heterotrophs
Nitrogen Cycle 2
Grassland Biome
16. Developed long legs and many are hoofed
Grassland Animals
Photic Zone
Pyramid of Mass
Nitrogen Cycle 3
17. Determines the nature of plant and animal life in the soil
Desert Biome
Substratum (soil/rock)
Mutualims
Nitrogen cycle 1
18. Adaptations for maintaining their internal osmolarity and conserving water
Food Chain
Competition Same Niche
Successive Communities
Osmoregulation
19. Nekton and benthos - scavengers - and predators (fiercely competitive)
Substratum (soil/rock)
Grassland Animals
Aphotic Zone animals
Poikilothermic (Cold Blooded)
20. When one organism is benefited by the association and the other is not affected
Aphotic Zone
Substratum (soil/rock)
Littoral Zone
Commensalism
21. Composed of populations that are able to exist under the new conditions
Nitrogen
Food Web
Successive Communities
Scavengers
22. Animals that consume only plants or plant foods
Deep-sea Organisms
Population
Herbivores
Pyramid of Numbers
23. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Carbon Cycle 2
Polar Region
Temperate Deciduous Forest Plants
Grassland Animals
24. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Pyramid of Energy
Hydrosphere
Taiga Animals
Epiphytes
25. 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
Successive Communities
Saprophytes
Carbon Cycle 1
Heterotrophs
26. Animals that consume primary consumers (carnivores)
Environmental Factors
Secondary Consumers
Biotic Community
Rootlike holdfasts
27. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Population
Organism
Tropical Rain Forest Biome
Desert animals
28. 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
Substratum-texture
Hemeothermic (Warm Blooded)
Climate and weather
Hypotonic
29. Integrated system of species that are dependent upon one another for survival
Marshes
Osmoregulation
Community
Autotrophs
30. 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
Substratum-Humus
Predators
Food Chain
31. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Thundra Animals
Rootlike holdfasts
Food Chain
Deep-sea Organisms
32. One or both organisms can't survive without the other
Nekton
Rootlike holdfasts
Obligatory
Dentrified
33. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Environmental Factors
Pyramid of Mass
Tropical Rain Forest Biome
Biosphere
34. Links between oceans and land
Marshes
Abiotic (Physical) Environment
Intertidal Zone Population
Substratum-Humus
35. 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
Saprophytes
Obligatory
Carbon Cycle 3
Environmental Factors
36. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Temperate Deciduous Forest Plants
Carbon Cycle 2
Population
37. Animals that eat both plants and animals
Littoral Zone Populations
Cohesive Force
Parasitism
Omnivores
38. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Herbivores
Tropical Rain Forest Plants
Benthos
Tropical Rain Forest Animals
39. Distinct community in a geographic region
Biome
Communities
Competition Same Niche 3
Physical Environment- Water
40. Rock and soil surface
Marshes
Tropical Rain Forest Plants
Nitrogen cycle 1
Lithosphere
41. Determine by the amount of decaying plant and animal life in the soil
Conditions for stability in an Ecosystem
Temperate Deciduous Forest Animals
Substratum-Humus
Secondary Consumers
42. Freshwater Biomes vs. Saltwater 2: In rivers and streams - strong swift currents exist - and thus fish that have developed strong muscles and plants with _____________ have survived
Tropical Rain Forest Plants
Rootlike holdfasts
Mutualims
Photic Zone animals
43. 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
Organism
Primary Consumers
Aquatic Biomes
Competition
44. Encompasses all that is external to the organism and is necessary for its existence
Carbon Cycle 3
Niche
Environment
Competition Same Niche 2
45. Regiong beneatht he photic zone that receives no light
Tropical Rain Forest Plants
Temperate Deciduous Forest Biome
Aphotic Zone
Intraspecific Interactions
46. Lichens and moss
Pyramid of Mass
Tundra Plants
Taiga Animals
Pioneer Organism
47. Determined by the same decisive factors-temperatures and rainfall
Climate and weather
Nature of Biomes
Lithosphere
Temperate Coniferous Forest Biome
48. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Nekton
Physical Environment-Temperature
Autotrophs
Nitrogen Cycle 5
49. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Photic zone
Climax Community
Desert animals
Nitrogen
50. 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
Intertidal Zone Population
Taiga Biome
Saprophytes
Substratum (soil/rock)