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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. 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
Saprophytes
Dentrified
Food Pyramids
Second Law of Thermodynamics
2. 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
Organism
Tundra Biome
Coimax Vegetatioin
Biosphere
3. 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
Producers
Food Chain
Tundra Biome
Desert Biome
4. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Other Cycles
Successive Communities
Intertidal Zone
Grassland Animals
5. Animals that consume primary consumers (carnivores)
Grassland Animals
Carbon Cycle 3
Epiphytes
Secondary Consumers
6. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Temperate Deciduous Forest Animals
Climax Community
Biotic Environment
Nitrogen Cycle 2
7. The vegetation that becomes dominant and stable after years of evolutiionary development
Organism
Coimax Vegetatioin
Species
Substratum-Humus
8. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Carbon Cycle 3
Hydrosphere
Temperate Deciduous Forest Biome
Tundra Biome
9. Include saprophytic organisms and organisms of decay
Decomposer
Ecology
Temperate Coniferous Forest Biome
Thundra Animals
10. Distinct community in a geographic region
Competition Same Niche 3
Biome
Producers
Physical Environment-Temperature
11. One or both organisms can't survive without the other
Mutualims
Obligatory
Desert animals
Food Chain
12. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Photic Zone
Desert animals
Tropical Rain Forest Plants
Aphotic Zone
13. 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
Intraspecific Interactions
Aquatic Biomes
Taiga Biome
Temperate Coniferous Forest Biome
14. The major component of the internal environment of all living things
Hypotonic
Coimax Vegetatioin
Physical Environment- Water
Pelagic Zone
15. One that exerts control over the other species that are present
Hemeothermic (Warm Blooded)
Dominant Species
Taiga Animals
Material Cycles
16. Includes climate - temperature - availability of light and water - and the local topology
Symbionts
Competition Same Niche 3
Abiotic (Physical) Environment
Tropical Rain Forest Biome
17. 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
Substratum (soil/rock)
Biosphere
Nitrogen Cycle 2
18. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Lithosphere
Competition
Physical Environment-Temperature
Epiphytes
19. Recycle water - oxygen - and phosphorus
Heterotrophs
Osmoregulation
Other Cycles
Taiga Plants
20. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Carbon Cycle 1
Niche
Nitrogen Cycle 2
Biome
21. Rhododendrons and pines are more suited for growth in acid oil
Substratum-pH
Nitrogen
Ecosystem
Nitrogen cycle 1
22. Determined by the same decisive factors-temperatures and rainfall
Ecology
Nitrogen Cycle 4
Nature of Biomes
Food Pyramids
23. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Ecological Succession
Biotic Community
Marine Biomes
Substratum (soil/rock)
24. 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
Epiphytes
Hemeothermic (Warm Blooded)
Desert animals
25. When one organism is benefited by the association and the other is not affected
Commensalism
Carnivores
Freshwater Biomes
Tropical Rain Forest Animals
26. Composed of populations that are able to exist under the new conditions
Poikilothermic (Cold Blooded)
Successive Communities
Ecological Succession
Mutualims
27. The chief disruptive force
Predators
Competition
Temperate Coniferous Forest Biome
Taiga Plants
28. Animals that only eat other animals -possess pointed teeth and fang-like canine teeth for tearing flesh -have shorter digestive tracts because the easier digestibility of animal food
Hydrosphere
Pyramid of Numbers
Carnivores
Aphotic Zone
29. The study of interactions between organisms and their environment
Competition Same Niche
Taiga Biome
Ecology
Polar Region
30. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Pyramid of Mass
Nitrogen Cycle 2
Primary Consumers
31. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Producers
Hemeothermic (Warm Blooded)
Cohesive Force
Biome
32. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Tropical Rain Forest Animals
Conditions for stability in an Ecosystem
Ecosystem
Tertiary Consumers
33. Regiong beneatht he photic zone that receives no light
Autotrophs
Omnivores
Temperate Deciduous Forest Animals
Aphotic Zone
34. Include reproduction and protection from predators and destructive weather
Aquatic Biomes
Grassland Biome
Cohesive Force
Competition Same Niche
35. One species may be competitively superior to the other and drive the second to extinction
Osmoregulation
Communities
Competition Same Niche 3
Competition Same Niche
36. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Food Chain
Dentrified
Producers
Freshwater Biomes
37. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Tropical Rain Forest Plants
Photic Zone animals
Desert Biome
Saprophytes
38. 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
Littoral Zone Populations
Community
Grassland Biome
39. 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
Photic zone
Secondary Consumers
Obligatory
40. Polar bears - musk oxen - and arctic hens
Rootlike holdfasts
Carnivores
Food Pyramids
Thundra Animals
41. Deer - fox - woodchuck - and squirrel
Biome
Tertiary Consumers
Temperate Deciduous Forest Animals
Biosphere
42. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Symbionts
Competition Same Niche 2
Nitrified
Desert animals
43. Includes the community and the environment and usually all five kingdoms
Lithosphere
Ecosystem
Littoral Zone
Producers
44. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Autotrophs
Taiga Plants
Nitrified
Communities
45. 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
Temperate Coniferous Plants
Photic Zone
Littoral Zone
Food Pyramids
46. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Heterotrophs
Physical Environment-Temperature
Obligatory
Nitrogen Cycle 2
47. Only animal life and other heterotrophic life exists
Littoral Zone
Dominant Species
Pyramid of Energy
Aphotic Zone
48. 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
Desert animals
Carbon Cycle 3
Grassland Biome
Intraspecific Interactions
49. Each member of a food chain uses some of the energy it obtains from its food for its own metabolism and loses some additional energy in the form of heat
Physical Environment- Water
Physical Environment-Sunlight
Pyramid of Energy
Carnivores
50. Animals that consume dead animals
Scavengers
Nitrogen
Competition Same Niche 3
Competition
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