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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. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Climate and weather
Physical Environment-Temperature
Taiga Biome
Population
2. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Predators
Producers
Environmental Factors
Secondary Consumers
3. Determines water holding capacity
Substratum-texture
Grassland Animals
Saprophytes
Marshes
4. 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
Competition Same Niche
Physical Environment-Sunlight
Tundra Biome
Nitrogen cycle 1
5. 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
Biome
Successive Communities
Decomposer
Saprophytes
6. Animals that consume only plants or plant foods
Pelagic Zone
Herbivores
Thundra Animals
Predators
7. Rivers - lakes - ponds - and marshes
Heterotrophs
Freshwater Biomes
Pyramid of Numbers
Thundra Animals
8. Only animal life and other heterotrophic life exists
Aphotic Zone
Intertidal Zone
Competition Same Niche 3
Material Cycles
9. Determines the nature of plant and animal life in the soil
Nitrogen Cycle 4
Substratum (soil/rock)
Taiga Biome
Biosphere
10. Polar bears - musk oxen - and arctic hens
Littoral Zone
Predators
Nitrogen Cycle 4
Thundra Animals
11. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Substratum-Minerals
Biosphere
Benthos
Substratum (soil/rock)
12. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Producers
Benthos
Ecosystem
Nitrogen Cycle 2
13. Deer - fox - woodchuck - and squirrel
Hydrosphere
Grassland Animals
Temperate Deciduous Forest Animals
Competition Same Niche 3
14. Consists of populations of different plants and animal species interacting with each other in a given environment
Photic Zone animals
Communities
Benthos
Ecosystem
15. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Physical Environment-Sunlight
Marshes
Symbionts
Predators
16. The study of interactions between organisms and their environment
Ecological Succession
Commensalism
Hemeothermic (Warm Blooded)
Ecology
17. Include reproduction and protection from predators and destructive weather
Cohesive Force
Tropical Rain Forest Animals
Freshwater Biomes
Grassland Animals
18. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Ecological Succession
Aphotic Zone animals
Secondary Consumers
Temperate Deciduous Forest Animals
19. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Nature of Biomes
Substratum-Humus
Epiphytes
Dominant Species
20. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Intertidal Zone
Polar Region
Heterotrophs
Commensalism
21. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Tropical Rain Forest Biome
Nitrogen cycle 1
Temperate Deciduous Forest Plants
Predators
22. When a parasite benefits at the expense of the host
Parasitism
Tertiary Consumers
Dentrified
Nitrogen Cycle 2
23. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Marine Biomes
Intertidal Zone
Competition Same Niche 3
Nature of Biomes
24. 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
Carnivores
Carbon Cycle 3
Grassland Biome
Desert Biome
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
Substratum-pH
Nitrogen Cycle 5
Carbon Cycle 1
Pyramid of Mass
26. 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
Conditions for stability in an Ecosystem
Biotic Environment
Symbionts
Nitrogen Cycle 4
27. 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
Dominant Species
Population
Predators
28. Organisms that manufacture their own food
Autotrophs
Substratum-pH
Competition Same Niche 3
Grassland Biome
29. Affect the type of vegetation that can be supported
Competition Same Niche 2
Substratum-texture
Physical Environment-Sunlight
Substratum-Minerals
30. Determine by the amount of decaying plant and animal life in the soil
Desert animals
Substratum-Humus
Marshes
Temperate Coniferous Plants
31. Adaptations for maintaining their internal osmolarity and conserving water
Tertiary Consumers
Parasitism
Nitrogen Cycle 5
Osmoregulation
32. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Taiga Animals
Tertiary Consumers
Photic Zone animals
Taiga Biome
33. Rhododendrons and pines are more suited for growth in acid oil
Environment
Substratum-pH
Carnivores
Competition Same Niche 2
34. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Desert Biome
Ecological Succession
Producers
Thundra Animals
35. Sunlit layer of the open sea extending to a depth of 250-600ft
Secondary Consumers
Aphotic Zone
Photic zone
Nitrogen Cycle 4
36. Any group of similar organisms that are capable of reproducing
Lithosphere
Food Web
Abiotic (Physical) Environment
Species
37. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Material Cycles
Conditions for stability in an Ecosystem
Sere
Tropical Rain Forest Plants
38. Developed long legs and many are hoofed
Grassland Animals
Pyramid of Energy
Hypotonic
Hemeothermic (Warm Blooded)
39. Determined by the same decisive factors-temperatures and rainfall
Osmoregulation
Sere
Nature of Biomes
Hydrosphere
40. Includes climate - temperature - availability of light and water - and the local topology
Carbon Cycle 2
Abiotic (Physical) Environment
Mutualims
Thundra Animals
41. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Nitrified
Food Web
Decomposer
Coimax Vegetatioin
42. Conserve water actively
Temperate Coniferous Plants
Intertidal Zone Population
Biome
Desert Plants
43. 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
Tundra Biome
Benthos
Nitrified
Climate and weather
44. 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
Environmental Factors
Abiotic (Physical) Environment
Carbon Cycle 3
Pyramid of Numbers
45. Symbiotic relationship from which both organisms derive some benefit
Deep-sea Organisms
Rootlike holdfasts
Mutualims
Freshwater Biomes
46. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Niche
Physical Environment- Water
Temperate Deciduous Forest Plants
Ecological Succession
47. First to resettle a virgin area
Physical Environment-Temperature
Pioneer Organism
Grassland Animals
Biosphere
48. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Environmental Factors
Desert animals
Second Law of Thermodynamics
Omnivores
49. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Grassland Biome
Temperate Deciduous Forest Biome
Physical Environment- Water
Biotic Community
50. 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
Poikilothermic (Cold Blooded)
Pyramid of Mass
Thundra Animals
Competition Same Niche 2