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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. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Temperate Deciduous Forest Plants
Obligatory
Intertidal Zone Population
Predators
2. 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
Competition
Saprophytes
Substratum-Humus
Aphotic Zone animals
3. Determined by the same decisive factors-temperatures and rainfall
Nature of Biomes
Successive Communities
Substratum (soil/rock)
Nitrogen
4. 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
Taiga Animals
Competition Same Niche 3
Symbionts
Food Pyramids
5. When a parasite benefits at the expense of the host
Photic Zone
Parasitism
Dentrified
Population
6. Needs constant energy source and cycling of materials between the living system
Marine Biomes
Conditions for stability in an Ecosystem
Species
Community
7. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Littoral Zone
Food Chain
Ecosystem
Conditions for stability in an Ecosystem
8. Animals that feed on secondary consumer
Secondary Consumers
Tertiary Consumers
Biotic Community
Tundra Plants
9. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Intertidal Zone
Nitrogen Cycle 4
Symbionts
Temperate Deciduous Forest Plants
10. The vegetation that becomes dominant and stable after years of evolutiionary development
Physical Environment-Sunlight
Coimax Vegetatioin
Aphotic Zone
Abiotic (Physical) Environment
11. One species may be competitively superior to the other and drive the second to extinction
Carnivores
Obligatory
Competition Same Niche
Marshes
12. Animals that consume green plants (herbivores)
Intraspecific Interactions
Substratum (soil/rock)
Environmental Factors
Primary Consumers
13. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Tundra Biome
Littoral Zone Populations
Taiga Animals
Climate and weather
14. The oceans
Commensalism
Substratum-pH
Hydrosphere
Marshes
15. Used to include only the population and not their physical environment
Environmental Factors
Niche
Biotic Community
Desert animals
16. 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
Grassland Biome
Ecology
Environmental Factors
Taiga Biome
17. Integrated system of species that are dependent upon one another for survival
Temperate Deciduous Forest Animals
Nekton
Environmental Factors
Community
18. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Desert Plants
Material Cycles
Successive Communities
Deep-sea Organisms
19. Sunlit layer of the open sea extending to a depth of 250-600ft
Photic zone
Primary Consumers
Desert Plants
Competition Same Niche 2
20. 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
Ecology
Carbon Cycle 3
Pelagic Zone
Hypotonic
21. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Primary Consumers
Photic Zone
Benthos
Food Web
22. Regiong beneatht he photic zone that receives no light
Producers
Osmoregulation
Nitrified
Aphotic Zone
23. Rock and soil surface
Photic Zone
Lithosphere
Commensalism
Rootlike holdfasts
24. Distinct community in a geographic region
Species
Desert Biome
Biome
Cohesive Force
25. Polar bears - musk oxen - and arctic hens
Food Pyramids
Competition Same Niche 2
Carbon Cycle 2
Thundra Animals
26. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Scavengers
Nitrogen
Competition Same Niche 3
Food Pyramids
27. Determines the nature of plant and animal life in the soil
Desert animals
Parasitism
Substratum (soil/rock)
Substratum-pH
28. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Epiphytes
Photic Zone animals
Nitrogen Cycle 3
Nitrogen cycle 1
29. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Physical Environment-Temperature
Biome
Conditions for stability in an Ecosystem
Desert Biome
30. Developed long legs and many are hoofed
Grassland Animals
Pyramid of Numbers
Abiotic (Physical) Environment
Aphotic Zone
31. 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
Niche
Pelagic Zone
Carbon Cycle 3
Producers
32. The chief disruptive force
Nitrogen Cycle 5
Physical Environment- Water
Coimax Vegetatioin
Competition
33. Includes climate - temperature - availability of light and water - and the local topology
Carbon Cycle 1
Abiotic (Physical) Environment
Producers
Predator-Prey relationship
34. 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
Photic Zone animals
Benthos
Grassland Biome
Community
35. 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
Scavengers
Littoral Zone
Competition Same Niche
36. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Ecology
Dentrified
Material Cycles
Carbon Cycle 2
37. Animals that consume only plants or plant foods
Temperate Coniferous Plants
Species
Niche
Herbivores
38. Nekton and benthos - scavengers - and predators (fiercely competitive)
Carnivores
Nitrogen Cycle 4
Aphotic Zone animals
Nitrogen
39. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Substratum (soil/rock)
Dominant Species
Biosphere
Desert Biome
40. 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
Environmental Factors
Substratum-texture
Nitrogen cycle 1
Herbivores
41. 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
Intertidal Zone Population
Climate and weather
Nitrogen Cycle 4
Dentrified
42. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Ecological Succession
Pyramid of Mass
Climate and weather
Competition Same Niche 3
43. Encompasses all that is external to the organism and is necessary for its existence
Intertidal Zone
Autotrophs
Population
Environment
44. Forest floors contain moss and lichens
Photic Zone animals
Thundra Animals
Taiga Plants
Nitrogen cycle 1
45. Free-living organisms that feed on other living organisms
Predators
Secondary Consumers
Biosphere
Pyramid of Mass
46. Vegetation such as vines and eppiphytes
Aphotic Zone
Tropical Rain Forest Plants
Hemeothermic (Warm Blooded)
Environmental Factors
47. Include reproduction and protection from predators and destructive weather
Producers
Epiphytes
Intraspecific Interactions
Cohesive Force
48. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Biotic Environment
Deep-sea Organisms
Competition
Secondary Consumers
49. One or both organisms can't survive without the other
Osmoregulation
Hypotonic
Obligatory
Community
50. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Littoral Zone
Substratum-texture
Grassland Animals
Epiphytes