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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. 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
Temperate Coniferous Forest Biome
Nitrogen Cycle 4
Taiga Animals
Physical Environment-Temperature
2. Includes climate - temperature - availability of light and water - and the local topology
Nitrogen Cycle 3
Dominant Species
Abiotic (Physical) Environment
Secondary Consumers
3. 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
Climate and weather
Competition Same Niche
Saprophytes
Deep-sea Organisms
4. Determines the nature of plant and animal life in the soil
Pyramid of Numbers
Substratum (soil/rock)
Nitrogen Cycle 4
Competition
5. Developed long legs and many are hoofed
Climate and weather
Grassland Animals
Grassland Biome
Tertiary Consumers
6. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Decomposer
Producers
Climate and weather
7. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Epiphytes
Grassland Biome
Intertidal Zone
Tundra Biome
8. Rock and soil surface
Environment
Taiga Animals
Lithosphere
Decomposer
9. One that exerts control over the other species that are present
Symbionts
Successive Communities
Hemeothermic (Warm Blooded)
Dominant Species
10. First to resettle a virgin area
Hemeothermic (Warm Blooded)
Desert animals
Obligatory
Pioneer Organism
11. Receive less than ten inches of rain each year; the rain is concentrated within a few heavy cloudbursts -ex: Sahara in Africa and Gobi in Asia
Taiga Plants
Second Law of Thermodynamics
Desert animals
Desert Biome
12. Organisms that manufacture their own food
Autotrophs
Biome
Other Cycles
Ecosystem
13. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Commensalism
Poikilothermic (Cold Blooded)
Biosphere
Aquatic Biomes
14. When a parasite benefits at the expense of the host
Conditions for stability in an Ecosystem
Second Law of Thermodynamics
Parasitism
Biotic Environment
15. 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
Carbon Cycle 2
Carbon Cycle 3
Carbon Cycle 1
Taiga Plants
16. Recycle water - oxygen - and phosphorus
Other Cycles
Successive Communities
Primary Consumers
Nekton
17. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Ecological Succession
Parasitism
Species
Temperate Coniferous Forest Biome
18. 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
Marine Biomes
Ecosystem
Pyramid of Energy
Decomposer
19. The vegetation that becomes dominant and stable after years of evolutiionary development
Taiga Biome
Epiphytes
Aphotic Zone animals
Coimax Vegetatioin
20. Animals that consume green plants (herbivores)
Predator-Prey relationship
Marine Biomes
Primary Consumers
Carbon Cycle 3
21. Region typical of the open seas and can be divided into photic and aphotic zones
Sere
Temperate Coniferous Plants
Pelagic Zone
Desert animals
22. 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
Aphotic Zone animals
Tundra Biome
Competition Same Niche 2
Organism
23. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Nitrogen Cycle 4
Desert Biome
Littoral Zone
Tropical Rain Forest Biome
24. 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
Desert animals
Nitrogen cycle 1
Material Cycles
Rootlike holdfasts
25. 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
Substratum (soil/rock)
Freshwater Biomes
Intertidal Zone Population
Climate and weather
26. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Photic Zone
Physical Environment-Temperature
Predator-Prey relationship
Desert Plants
27. 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
Tundra Biome
Heterotrophs
Physical Environment- Water
Niche
28. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Nitrogen Cycle 4
Intertidal Zone
Secondary Consumers
Nekton
29. Determine by the amount of decaying plant and animal life in the soil
Hemeothermic (Warm Blooded)
Successive Communities
Ecology
Substratum-Humus
30. 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
Rootlike holdfasts
Tropical Rain Forest Plants
Organism
Desert Biome
31. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Littoral Zone
Food Pyramids
Physical Environment-Sunlight
Dentrified
32. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Deep-sea Organisms
Decomposer
Pelagic Zone
Hydrosphere
33. Rivers - lakes - ponds - and marshes
Freshwater Biomes
Dominant Species
Sere
Secondary Consumers
34. One or both organisms can't survive without the other
Taiga Biome
Obligatory
Nitrogen
Saprophytes
35. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Physical Environment- Water
Obligatory
Environmental Factors
Thundra Animals
36. The chief disruptive force
Competition
Desert Plants
Communities
Desert Biome
37. Group of organisms of the same species living together in a given location
Population
Obligatory
Intraspecific Interactions
Second Law of Thermodynamics
38. Include saprophytic organisms and organisms of decay
Intertidal Zone
Decomposer
Nature of Biomes
Tropical Rain Forest Animals
39. Free-living organisms that feed on other living organisms
Predators
Physical Environment- Water
Decomposer
Littoral Zone
40. Nekton and benthos - scavengers - and predators (fiercely competitive)
Dentrified
Aphotic Zone animals
Nature of Biomes
Photic zone
41. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Primary Consumers
Taiga Biome
Food Chain
Pioneer Organism
42. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Niche
Poikilothermic (Cold Blooded)
Hemeothermic (Warm Blooded)
Tropical Rain Forest Biome
43. Adaptations for maintaining their internal osmolarity and conserving water
Desert animals
Parasitism
Food Chain
Osmoregulation
44. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Rootlike holdfasts
Abiotic (Physical) Environment
Temperate Deciduous Forest Plants
Temperate Deciduous Forest Animals
45. 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
Epiphytes
Aquatic Biomes
Parasitism
Grassland Biome
46. Determines water holding capacity
Substratum-texture
Substratum-pH
Carbon Cycle 1
Scavengers
47. 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
Coimax Vegetatioin
Osmoregulation
Intraspecific Interactions
Pelagic Zone
48. 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
Hypotonic
Physical Environment-Sunlight
Pelagic Zone
Nitrogen Cycle 4
49. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Tropical Rain Forest Animals
Substratum-Humus
Desert Plants
Nitrogen
50. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Physical Environment-Temperature
Nitrogen
Littoral Zone Populations
Temperate Coniferous Plants