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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 chief disruptive force
Competition
Communities
Pyramid of Mass
Competition Same Niche
2. Lichens and moss
Photic zone
Tropical Rain Forest Biome
Tundra Plants
Tropical Rain Forest Plants
3. Includes the community and the environment and usually all five kingdoms
Ecosystem
Photic Zone
Desert Biome
Desert Plants
4. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Physical Environment-Temperature
Carbon Cycle 3
Predators
Species
5. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Population
Producers
Temperate Coniferous Forest Biome
Environment
6. 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 Energy
Rootlike holdfasts
Nitrogen cycle 1
Pyramid of Numbers
7. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Ecological Succession
Cohesive Force
Benthos
Nitrogen Cycle 2
8. Polar bears - musk oxen - and arctic hens
Carbon Cycle 2
Thundra Animals
Photic zone
Grassland Animals
9. Determined by the same decisive factors-temperatures and rainfall
Nitrogen Cycle 3
Intertidal Zone Population
Ecology
Nature of Biomes
10. Determines the nature of plant and animal life in the soil
Herbivores
Substratum (soil/rock)
Hypotonic
Substratum-Humus
11. Any group of similar organisms that are capable of reproducing
Substratum-texture
Species
Producers
Material Cycles
12. Needs constant energy source and cycling of materials between the living system
Physical Environment-Temperature
Conditions for stability in an Ecosystem
Heterotrophs
Coimax Vegetatioin
13. Food chain is not a simple linear chain but an intricate web
Saprophytes
Food Web
Nitrified
Physical Environment-Sunlight
14. Every energy transfer involves a loss of energy and each level of the food chain uses some of the energy it obtains from the food for its own metabolism and loses some additional energy in the form of heat
Successive Communities
Second Law of Thermodynamics
Physical Environment- Water
Tropical Rain Forest Biome
15. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Intraspecific Interactions
Aquatic Biomes
Organism
Carbon Cycle 3
16. Affect the type of vegetation that can be supported
Abiotic (Physical) Environment
Hypotonic
Substratum-Minerals
Grassland Biome
17. Region typical of the open seas and can be divided into photic and aphotic zones
Pelagic Zone
Aphotic Zone
Physical Environment- Water
Biome
18. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Autotrophs
Littoral Zone
Intertidal Zone Population
Nitrogen Cycle 3
19. Animals that feed on secondary consumer
Littoral Zone
Physical Environment-Temperature
Decomposer
Tertiary Consumers
20. Free-living organisms that feed on other living organisms
Predators
Substratum-pH
Ecosystem
Poikilothermic (Cold Blooded)
21. 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
Saprophytes
Temperate Coniferous Forest Biome
Dentrified
Hemeothermic (Warm Blooded)
22. Animals that consume only plants or plant foods
Saprophytes
Nitrogen Cycle 4
Herbivores
Substratum (soil/rock)
23. 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
Substratum-pH
Decomposer
Herbivores
24. Conserve water actively
Desert Plants
Physical Environment- Water
Photic zone
Deep-sea Organisms
25. 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
Herbivores
Nitrogen
Scavengers
Pyramid of Mass
26. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Symbionts
Poikilothermic (Cold Blooded)
Taiga Animals
Temperate Deciduous Forest Biome
27. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Food Pyramids
Poikilothermic (Cold Blooded)
Substratum-texture
Biotic Community
28. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Biotic Environment
Desert Biome
Hemeothermic (Warm Blooded)
Hydrosphere
29. 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
Competition Same Niche 2
Tundra Plants
Osmoregulation
Producers
30. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Polar Region
Herbivores
Omnivores
Intertidal Zone Population
31. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Physical Environment- Water
Competition Same Niche 2
Marshes
Predator-Prey relationship
32. Recycle water - oxygen - and phosphorus
Other Cycles
Food Web
Desert Plants
Tropical Rain Forest Animals
33. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Nitrogen
Intraspecific Interactions
Nitrogen Cycle 3
Rootlike holdfasts
34. The major component of the internal environment of all living things
Tertiary Consumers
Coimax Vegetatioin
Taiga Plants
Physical Environment- Water
35. Only animal life and other heterotrophic life exists
Nitrified
Temperate Coniferous Plants
Aphotic Zone
Obligatory
36. Consists of populations of different plants and animal species interacting with each other in a given environment
Communities
Symbionts
Nitrogen Cycle 5
Grassland Biome
37. The ultimate source of energy for all organisms
Cohesive Force
Physical Environment-Sunlight
Other Cycles
Autotrophs
38. One or both organisms can't survive without the other
Saprophytes
Dominant Species
Obligatory
Pelagic Zone
39. Determines water holding capacity
Desert Plants
Substratum-texture
Biosphere
Tertiary Consumers
40. 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
Scavengers
Carnivores
Biome
Tundra Biome
41. Animals that consume green plants (herbivores)
Primary Consumers
Coimax Vegetatioin
Predator-Prey relationship
Heterotrophs
42. 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
Physical Environment- Water
Species
Intraspecific Interactions
Symbionts
43. Animals that eat both plants and animals
Ecological Succession
Desert Plants
Omnivores
Marine Biomes
44. Algae - crabs - crustacea - and many different species of fish
Dominant Species
Physical Environment-Sunlight
Littoral Zone Populations
Biotic Community
45. Used to include only the population and not their physical environment
Predator-Prey relationship
Biotic Community
Physical Environment- Water
Second Law of Thermodynamics
46. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Pelagic Zone
Heterotrophs
Biosphere
Parasitism
47. Integrated system of species that are dependent upon one another for survival
Autotrophs
Pioneer Organism
Community
Secondary Consumers
48. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Biotic Community
Epiphytes
Dentrified
Photic Zone
49. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Predator-Prey relationship
Nitrogen Cycle 4
Desert animals
Symbionts
50. Nekton and benthos - scavengers - and predators (fiercely competitive)
Ecosystem
Aphotic Zone animals
Ecology
Mutualims