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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. 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
Intraspecific Interactions
Intertidal Zone
Ecosystem
Climax Community
2. Animals that consume dead animals
Nekton
Secondary Consumers
Scavengers
Physical Environment- Water
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
Aquatic Biomes
Saprophytes
Photic Zone animals
Nitrogen Cycle 2
4. Food chain is not a simple linear chain but an intricate web
Food Web
Hydrosphere
Aquatic Biomes
Ecology
5. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Lithosphere
Environment
Pyramid of Numbers
Photic Zone animals
6. Integrated system of species that are dependent upon one another for survival
Community
Nitrogen Cycle 4
Nekton
Hemeothermic (Warm Blooded)
7. Links between oceans and land
Dentrified
Herbivores
Marshes
Symbionts
8. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Commensalism
Nitrogen Cycle 2
Nitrogen cycle 1
Carnivores
9. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Photic Zone animals
Biome
Organism
Saprophytes
10. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Ecological Succession
Pyramid of Numbers
Tundra Plants
Omnivores
11. First to resettle a virgin area
Obligatory
Pioneer Organism
Environment
Marine Biomes
12. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Ecosystem
Epiphytes
Benthos
Sere
13. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Hypotonic
Taiga Animals
Scavengers
Material Cycles
14. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Pelagic Zone
Desert Biome
Taiga Animals
Tundra Plants
15. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Competition Same Niche 3
Nitrogen Cycle 3
Taiga Plants
Thundra Animals
16. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Temperate Deciduous Forest Plants
Taiga Animals
Dominant Species
Competition Same Niche
17. Nekton and benthos - scavengers - and predators (fiercely competitive)
Epiphytes
Aphotic Zone animals
Saprophytes
Desert animals
18. One that exerts control over the other species that are present
Dominant Species
Scavengers
Food Pyramids
Physical Environment- Water
19. Region typical of the open seas and can be divided into photic and aphotic zones
Physical Environment- Water
Littoral Zone
Coimax Vegetatioin
Pelagic Zone
20. 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
Hemeothermic (Warm Blooded)
Grassland Biome
Pioneer Organism
Nitrogen cycle 1
21. 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
Decomposer
Competition Same Niche 2
Nitrogen Cycle 2
Carbon Cycle 3
22. Lichens and moss
Population
Temperate Deciduous Forest Plants
Tundra Plants
Hemeothermic (Warm Blooded)
23. 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
Taiga Biome
Physical Environment-Temperature
Niche
24. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Tropical Rain Forest Animals
Ecosystem
Temperate Deciduous Forest Biome
Competition
25. Animals that consume primary consumers (carnivores)
Community
Secondary Consumers
Nitrogen
Biosphere
26. Developed long legs and many are hoofed
Deep-sea Organisms
Nitrogen Cycle 3
Grassland Animals
Heterotrophs
27. Rivers - lakes - ponds - and marshes
Omnivores
Freshwater Biomes
Osmoregulation
Species
28. Include saprophytic organisms and organisms of decay
Thundra Animals
Tropical Rain Forest Plants
Decomposer
Dominant Species
29. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Temperate Coniferous Forest Biome
Competition Same Niche 2
Tropical Rain Forest Plants
Littoral Zone
30. Receive less rainfall than the temperate forests - have long - cold winters - and are inhabited by single coniferous tree-the spruce -extreme northern parts of Canada and Russia
Taiga Biome
Population
Competition Same Niche 2
Food Web
31. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Second Law of Thermodynamics
Dominant Species
Biosphere
Climate and weather
32. Includes the community and the environment and usually all five kingdoms
Carnivores
Communities
Ecosystem
Taiga Animals
33. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Parasitism
Carnivores
Substratum (soil/rock)
Heterotrophs
34. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Intraspecific Interactions
Ecosystem
Intertidal Zone Population
Nitrified
35. 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
Temperate Deciduous Forest Biome
Pyramid of Mass
Temperate Deciduous Forest Plants
Thundra Animals
36. 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
Dentrified
Niche
Temperate Deciduous Forest Biome
Epiphytes
37. Any group of similar organisms that are capable of reproducing
Physical Environment-Temperature
Species
Food Pyramids
Commensalism
38. Crawling and sessile organsms
Pelagic Zone
Symbionts
Benthos
Ecological Succession
39. Distinct community in a geographic region
Biotic Environment
Substratum-texture
Abiotic (Physical) Environment
Biome
40. Without a constant input of energy from the sun - an ecosystem would soon run down - as food is transferred from one level of the food chain to the next - a transfer of energy occurs
Material Cycles
Nitrogen Cycle 2
Food Pyramids
Freshwater Biomes
41. The oceans
Symbionts
Intraspecific Interactions
Pelagic Zone
Hydrosphere
42. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Nitrogen Cycle 5
Symbionts
Nitrogen
Species
43. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Population
Nature of Biomes
Dentrified
Obligatory
44. Encompasses all that is external to the organism and is necessary for its existence
Environment
Commensalism
Poikilothermic (Cold Blooded)
Population
45. 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
Desert animals
Organism
Tertiary Consumers
Carbon Cycle 2
46. Animals that feed on secondary consumer
Intertidal Zone Population
Aphotic Zone animals
Sere
Tertiary Consumers
47. Symbiotic relationship from which both organisms derive some benefit
Mutualims
Heterotrophs
Dentrified
Biosphere
48. The vegetation that becomes dominant and stable after years of evolutiionary development
Coimax Vegetatioin
Substratum-Minerals
Dentrified
Nitrogen Cycle 3
49. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Grassland Biome
Food Chain
Producers
Material Cycles
50. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Dentrified
Substratum (soil/rock)
Pyramid of Numbers
Omnivores