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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. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Carnivores
Intertidal Zone Population
Aphotic Zone animals
Intertidal Zone
2. Algae - crabs - crustacea - and many different species of fish
Littoral Zone Populations
Competition Same Niche 2
Pyramid of Mass
Substratum-pH
3. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Sere
Other Cycles
Dentrified
Primary Consumers
4. Deer - fox - woodchuck - and squirrel
Climax Community
Tropical Rain Forest Biome
Ecological Succession
Temperate Deciduous Forest Animals
5. 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
Osmoregulation
Tropical Rain Forest Plants
Desert Plants
Tundra Biome
6. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Substratum (soil/rock)
Intertidal Zone Population
Nitrogen
Symbionts
7. 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
Epiphytes
Lithosphere
Aquatic Biomes
Nitrogen Cycle 4
8. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Climax Community
Desert Biome
Cohesive Force
Ecological Succession
9. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Commensalism
Taiga Animals
Temperate Deciduous Forest Biome
Grassland Animals
10. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Intraspecific Interactions
Temperate Deciduous Forest Animals
Photic Zone
Temperate Coniferous Forest Biome
11. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Competition Same Niche 3
Tropical Rain Forest Animals
Grassland Biome
Tundra Biome
12. Crawling and sessile organsms
Food Pyramids
Biome
Benthos
Aphotic Zone animals
13. Organisms that manufacture their own food
Autotrophs
Nitrogen Cycle 5
Thundra Animals
Nitrogen Cycle 4
14. Animals that consume dead animals
Conditions for stability in an Ecosystem
Population
Scavengers
Sere
15. 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
Coimax Vegetatioin
Saprophytes
Lithosphere
Polar Region
16. Regiong beneatht he photic zone that receives no light
Parasitism
Food Web
Aphotic Zone
Aquatic Biomes
17. First to resettle a virgin area
Second Law of Thermodynamics
Pioneer Organism
Species
Taiga Biome
18. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Epiphytes
Communities
Thundra Animals
Pyramid of Numbers
19. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Heterotrophs
Ecological Succession
Coimax Vegetatioin
Pyramid of Energy
20. The vegetation that becomes dominant and stable after years of evolutiionary development
Dentrified
Coimax Vegetatioin
Benthos
Nitrogen cycle 1
21. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Ecology
Aphotic Zone
Desert animals
Pyramid of Numbers
22. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Scavengers
Climax Community
Other Cycles
Biosphere
23. Sunlit layer of the open sea extending to a depth of 250-600ft
Hemeothermic (Warm Blooded)
Freshwater Biomes
Photic zone
Ecological Succession
24. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Predator-Prey relationship
Competition
Desert Biome
Hydrosphere
25. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Photic Zone animals
Intertidal Zone
Competition Same Niche 2
Obligatory
26. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Aphotic Zone animals
Nature of Biomes
Biotic Environment
Cohesive Force
27. Nekton and benthos - scavengers - and predators (fiercely competitive)
Taiga Animals
Aphotic Zone animals
Nitrogen Cycle 2
Producers
28. When one organism is benefited by the association and the other is not affected
Scavengers
Temperate Coniferous Plants
Tertiary Consumers
Commensalism
29. Links between oceans and land
Organism
Ecological Succession
Marshes
Saprophytes
30. The study of interactions between organisms and their environment
Obligatory
Mutualims
Ecology
Coimax Vegetatioin
31. Integrated system of species that are dependent upon one another for survival
Herbivores
Carbon Cycle 2
Community
Tundra Plants
32. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Pyramid of Energy
Substratum-Humus
Ecosystem
Taiga Animals
33. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Nitrogen cycle 1
Lithosphere
Taiga Animals
Food Chain
34. 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
Coimax Vegetatioin
Intraspecific Interactions
Polar Region
Temperate Deciduous Forest Animals
35. Animals that consume primary consumers (carnivores)
Secondary Consumers
Taiga Plants
Competition Same Niche
Taiga Animals
36. Distinct community in a geographic region
Temperate Deciduous Forest Plants
Substratum-Humus
Biome
Temperate Deciduous Forest Animals
37. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Dominant Species
Ecosystem
Marine Biomes
Material Cycles
38. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Temperate Deciduous Forest Biome
Ecology
Deep-sea Organisms
Heterotrophs
39. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Physical Environment-Temperature
Deep-sea Organisms
Physical Environment-Sunlight
Littoral Zone
40. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Niche
Heterotrophs
Poikilothermic (Cold Blooded)
Biotic Environment
41. Used to include only the population and not their physical environment
Substratum (soil/rock)
Carbon Cycle 2
Biotic Community
Nitrogen Cycle 2
42. Needs constant energy source and cycling of materials between the living system
Tertiary Consumers
Photic Zone animals
Conditions for stability in an Ecosystem
Aquatic Biomes
43. 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
Benthos
Nitrogen cycle 1
Parasitism
Substratum (soil/rock)
44. 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
Sere
Niche
Herbivores
Littoral Zone Populations
45. The oceans
Marshes
Hydrosphere
Parasitism
Intertidal Zone Population
46. Conserve water actively
Osmoregulation
Desert Plants
Aphotic Zone animals
Material Cycles
47. Rock and soil surface
Lithosphere
Predator-Prey relationship
Competition Same Niche 2
Temperate Deciduous Forest Biome
48. Animals that consume only plants or plant foods
Intertidal Zone
Community
Desert Biome
Herbivores
49. Animals that eat both plants and animals
Saprophytes
Omnivores
Secondary Consumers
Desert Biome
50. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Littoral Zone
Environment
Mutualims
Nitrogen