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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.
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.
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. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intraspecific Interactions
Niche
Substratum-texture
Intertidal Zone Population
2. Sunlit layer of the open sea extending to a depth of 250-600ft
Photic zone
Desert Plants
Lithosphere
Environment
3. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Temperate Deciduous Forest Biome
Competition Same Niche 2
Polar Region
Desert animals
4. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Coimax Vegetatioin
Autotrophs
Mutualims
Nitrogen Cycle 2
5. Includes the community and the environment and usually all five kingdoms
Tundra Biome
Pioneer Organism
Intertidal Zone Population
Ecosystem
6. Adaptations for maintaining their internal osmolarity and conserving water
Pioneer Organism
Freshwater Biomes
Intraspecific Interactions
Osmoregulation
7. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Pelagic Zone
Obligatory
Temperate Coniferous Plants
Littoral Zone
8. 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
Aquatic Biomes
Environmental Factors
Nitrogen Cycle 3
9. 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
Aquatic Biomes
Temperate Coniferous Plants
Polar Region
Competition
10. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Competition Same Niche 2
Material Cycles
Competition Same Niche 3
Temperate Deciduous Forest Biome
11. Two fates await the ammonia (NH3). some are nitrified or dentrified
Substratum-pH
Omnivores
Material Cycles
Nitrogen Cycle 5
12. 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
Taiga Biome
Intraspecific Interactions
Photic Zone animals
Food Chain
13. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Photic Zone
Mutualims
Physical Environment- Water
Poikilothermic (Cold Blooded)
14. Encompasses all that is external to the organism and is necessary for its existence
Polar Region
Dentrified
Niche
Environment
15. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Competition Same Niche
Abiotic (Physical) Environment
Community
Symbionts
16. Animals that feed on secondary consumer
Food Chain
Substratum-texture
Predators
Tertiary Consumers
17. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Photic Zone
Biotic Community
Climate and weather
Population
18. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Nitrogen Cycle 4
Physical Environment-Temperature
Photic zone
Dentrified
19. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Rootlike holdfasts
Photic Zone animals
Thundra Animals
Predator-Prey relationship
20. 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
Ecology
Rootlike holdfasts
Poikilothermic (Cold Blooded)
Predator-Prey relationship
21. Free-living organisms that feed on other living organisms
Predators
Omnivores
Hemeothermic (Warm Blooded)
Community
22. Food chain is not a simple linear chain but an intricate web
Second Law of Thermodynamics
Food Web
Marine Biomes
Competition
23. Conserve water actively
Desert Plants
Population
Biotic Environment
Sere
24. Only animal life and other heterotrophic life exists
Aphotic Zone
Food Web
Hydrosphere
Physical Environment-Sunlight
25. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Temperate Coniferous Plants
Nitrogen Cycle 4
Taiga Biome
Competition Same Niche 3
26. 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
Environment
Freshwater Biomes
Carbon Cycle 1
Temperate Coniferous Forest Biome
27. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Marine Biomes
Cohesive Force
Climax Community
Sere
28. 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
Competition Same Niche 2
Climate and weather
Omnivores
Heterotrophs
29. Polar bears - musk oxen - and arctic hens
Rootlike holdfasts
Nekton
Thundra Animals
Hydrosphere
30. Animals that consume green plants (herbivores)
Substratum-Humus
Population
Primary Consumers
Desert Biome
31. 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
Marshes
Grassland Animals
Tropical Rain Forest Plants
Pyramid of Mass
32. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Biotic Environment
Physical Environment-Temperature
Hypotonic
Dominant Species
33. 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
Scavengers
Nature of Biomes
Hypotonic
34. 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
Nitrogen Cycle 4
Ecological Succession
Pyramid of Numbers
Nitrogen Cycle 5
35. Determine by the amount of decaying plant and animal life in the soil
Tropical Rain Forest Plants
Littoral Zone
Photic Zone animals
Substratum-Humus
36. The study of interactions between organisms and their environment
Decomposer
Photic Zone
Ecosystem
Ecology
37. 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
Organism
Autotrophs
Desert Biome
Substratum-texture
38. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Biome
Nature of Biomes
Environmental Factors
Photic zone
39. 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
Physical Environment-Sunlight
Tertiary Consumers
Carbon Cycle 3
Competition Same Niche
40. 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
Hypotonic
Communities
Substratum-texture
Competition Same Niche 2
41. Organisms that manufacture their own food
Autotrophs
Photic Zone
Aphotic Zone
Niche
42. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Biotic Community
Nitrogen
Climax Community
Community
43. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Physical Environment-Temperature
Nitrogen
Biome
Polar Region
44. Consists of populations of different plants and animal species interacting with each other in a given environment
Commensalism
Material Cycles
Communities
Ecology
45. The chief disruptive force
Nitrogen cycle 1
Cohesive Force
Food Web
Competition
46. Crawling and sessile organsms
Dominant Species
Benthos
Tertiary Consumers
Biome
47. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Aphotic Zone
Material Cycles
Commensalism
Tropical Rain Forest Biome
48. One or both organisms can't survive without the other
Poikilothermic (Cold Blooded)
Obligatory
Aquatic Biomes
Competition Same Niche 2
49. The oceans
Hydrosphere
Photic Zone animals
Pyramid of Numbers
Symbionts
50. 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
Intraspecific Interactions
Sere
Saprophytes
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