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PCAT Biology Ecology
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Subjects
:
pcat
,
biology
Instructions:
Answer 50 questions in 15 minutes.
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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. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Poikilothermic (Cold Blooded)
Nitrogen cycle 1
Material Cycles
Herbivores
2. 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
Competition Same Niche 3
Carbon Cycle 1
Intertidal Zone Population
Littoral Zone Populations
3. Deer - fox - woodchuck - and squirrel
Nitrogen Cycle 2
Temperate Deciduous Forest Animals
Predators
Physical Environment- Water
4. Lichens and moss
Desert Plants
Pioneer Organism
Tundra Plants
Cohesive Force
5. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Sere
Taiga Plants
Material Cycles
Symbionts
6. Crawling and sessile organsms
Secondary Consumers
Nitrogen
Benthos
Nitrified
7. Animals that consume dead animals
Substratum-Minerals
Tundra Plants
Scavengers
Predators
8. Affect the type of vegetation that can be supported
Carbon Cycle 3
Aphotic Zone animals
Substratum-Minerals
Ecological Succession
9. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Abiotic (Physical) Environment
Littoral Zone
Poikilothermic (Cold Blooded)
Taiga Biome
10. One that exerts control over the other species that are present
Producers
Dominant Species
Temperate Deciduous Forest Animals
Polar Region
11. Cold - dry - and inhabited by fir - pine - and spruce trees -much vegetation has evolved adaptations for water conservation such as needle-shaped leaves -Extreme Northern Part of the US and in Southern Canada
Temperate Deciduous Forest Animals
Temperate Coniferous Forest Biome
Photic zone
Hemeothermic (Warm Blooded)
12. When a parasite benefits at the expense of the host
Carbon Cycle 1
Littoral Zone Populations
Biosphere
Parasitism
13. When one organism is benefited by the association and the other is not affected
Conditions for stability in an Ecosystem
Commensalism
Biotic Environment
Ecosystem
14. Algae - crabs - crustacea - and many different species of fish
Temperate Deciduous Forest Biome
Autotrophs
Cohesive Force
Littoral Zone Populations
15. Recycle water - oxygen - and phosphorus
Other Cycles
Tertiary Consumers
Tropical Rain Forest Biome
Grassland Animals
16. First to resettle a virgin area
Pioneer Organism
Competition Same Niche 2
Taiga Animals
Temperate Coniferous Plants
17. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Climax Community
Physical Environment-Sunlight
Mutualims
Competition
18. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Nature of Biomes
Heterotrophs
Temperate Coniferous Forest Biome
Community
19. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Tertiary Consumers
Substratum-Humus
Primary Consumers
Dentrified
20. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Hypotonic
Conditions for stability in an Ecosystem
Osmoregulation
Hemeothermic (Warm Blooded)
21. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Biome
Physical Environment-Temperature
Substratum-pH
Littoral Zone Populations
22. Determine by the amount of decaying plant and animal life in the soil
Desert Plants
Predator-Prey relationship
Ecosystem
Substratum-Humus
23. 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
Climate and weather
Intertidal Zone
Ecology
Benthos
24. Animals that feed on secondary consumer
Carbon Cycle 3
Predators
Tertiary Consumers
Marshes
25. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Dominant Species
Coimax Vegetatioin
Photic Zone animals
Temperate Coniferous Plants
26. Animals that consume only plants or plant foods
Population
Herbivores
Conditions for stability in an Ecosystem
Benthos
27. One or both organisms can't survive without the other
Heterotrophs
Photic Zone
Obligatory
Ecosystem
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
Tropical Rain Forest Plants
Carbon Cycle 3
Desert animals
Climate and weather
29. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Nitrified
Physical Environment- Water
Desert Plants
Biosphere
30. Animals that eat both plants and animals
Omnivores
Environmental Factors
Littoral Zone
Sere
31. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Ecosystem
Biosphere
Population
Photic zone
32. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Poikilothermic (Cold Blooded)
Obligatory
Polar Region
Hypotonic
33. Composed of populations that are able to exist under the new conditions
Pelagic Zone
Ecological Succession
Successive Communities
Nitrogen Cycle 4
34. Adaptations for maintaining their internal osmolarity and conserving water
Nitrogen
Substratum-Humus
Climate and weather
Osmoregulation
35. Forest floors contain moss and lichens
Littoral Zone
Deep-sea Organisms
Aphotic Zone animals
Taiga Plants
36. Developed long legs and many are hoofed
Carbon Cycle 1
Tropical Rain Forest Biome
Grassland Animals
Ecological Succession
37. Vegetation such as vines and eppiphytes
Desert Biome
Tropical Rain Forest Plants
Desert Plants
Polar Region
38. 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
Littoral Zone Populations
Competition Same Niche
Intraspecific Interactions
Competition Same Niche 2
39. Region typical of the open seas and can be divided into photic and aphotic zones
Nitrogen cycle 1
Littoral Zone
Pelagic Zone
Abiotic (Physical) Environment
40. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Tundra Plants
Abiotic (Physical) Environment
Intertidal Zone
Intertidal Zone Population
41. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Photic Zone animals
Epiphytes
Hydrosphere
Climate and weather
42. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Grassland Biome
Desert animals
Hypotonic
Desert Biome
43. Community in an ecological succession is identified by a dominant species
Intertidal Zone
Sere
Niche
Community
44. 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
Omnivores
Temperate Deciduous Forest Biome
Taiga Biome
Competition Same Niche 2
45. The vegetation that becomes dominant and stable after years of evolutiionary development
Primary Consumers
Second Law of Thermodynamics
Coimax Vegetatioin
Grassland Animals
46. The ultimate source of energy for all organisms
Nitrogen Cycle 5
Physical Environment-Sunlight
Mutualims
Intertidal Zone Population
47. 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
Pyramid of Numbers
Rootlike holdfasts
Organism
Temperate Coniferous Forest Biome
48. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Deep-sea Organisms
Biome
Desert Plants
Saprophytes
49. Only animal life and other heterotrophic life exists
Marshes
Taiga Animals
Herbivores
Aphotic Zone
50. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Temperate Deciduous Forest Plants
Nitrogen Cycle 2
Biotic Community
Decomposer
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