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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. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Hypotonic
Organism
Poikilothermic (Cold Blooded)
Ecological Succession
2. Freshwater Biomes vs. Saltwater 1: Freshwater is _______________ which results in the passage of water into the cell. Freshwater organisms have homeostatic mechanisms to maintain water balance by the regular removal of the excess water. these include
Predators
Nitrogen Cycle 4
Hypotonic
Temperate Coniferous Plants
3. Animals that consume primary consumers (carnivores)
Nitrogen Cycle 2
Secondary Consumers
Competition Same Niche
Pelagic Zone
4. Determines water holding capacity
Photic Zone animals
Aphotic Zone animals
Pyramid of Mass
Substratum-texture
5. Symbiotic relationship from which both organisms derive some benefit
Successive Communities
Mutualims
Cohesive Force
Thundra Animals
6. Lichens and moss
Other Cycles
Herbivores
Competition Same Niche 2
Tundra Plants
7. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Poikilothermic (Cold Blooded)
Benthos
Material Cycles
Substratum-Humus
8. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Freshwater Biomes
Carbon Cycle 1
Nekton
Physical Environment- Water
9. Only animal life and other heterotrophic life exists
Aphotic Zone
Pyramid of Numbers
Ecology
Tundra Plants
10. Links between oceans and land
Intertidal Zone
Marshes
Physical Environment- Water
Temperate Deciduous Forest Plants
11. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Biotic Environment
Marine Biomes
Freshwater Biomes
Nature of Biomes
12. The vegetation that becomes dominant and stable after years of evolutiionary development
Marshes
Substratum-pH
Coimax Vegetatioin
Other Cycles
13. Recycle water - oxygen - and phosphorus
Temperate Deciduous Forest Plants
Other Cycles
Climate and weather
Environment
14. Includes climate - temperature - availability of light and water - and the local topology
Competition Same Niche
Commensalism
Nitrogen Cycle 3
Abiotic (Physical) Environment
15. Deer - fox - woodchuck - and squirrel
Temperate Deciduous Forest Animals
Tundra Biome
Physical Environment-Sunlight
Deep-sea Organisms
16. Used to include only the population and not their physical environment
Saprophytes
Dominant Species
Biotic Community
Desert Plants
17. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Biosphere
Ecology
Successive Communities
Scavengers
18. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Littoral Zone
Symbionts
Taiga Plants
Material Cycles
19. Region typical of the open seas and can be divided into photic and aphotic zones
Hypotonic
Sere
Pyramid of Energy
Pelagic Zone
20. 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
Aphotic Zone
Producers
Pyramid of Energy
Food Pyramids
21. When one organism is benefited by the association and the other is not affected
Nitrified
Nitrogen Cycle 5
Physical Environment- Water
Commensalism
22. Rock and soil surface
Secondary Consumers
Nature of Biomes
Lithosphere
Decomposer
23. Rhododendrons and pines are more suited for growth in acid oil
Substratum-pH
Substratum-Minerals
Saprophytes
Carbon Cycle 2
24. 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
Aphotic Zone animals
Carbon Cycle 3
Grassland Biome
Carnivores
25. Free-living organisms that feed on other living organisms
Food Pyramids
Intertidal Zone
Scavengers
Predators
26. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Tundra Biome
Osmoregulation
Hemeothermic (Warm Blooded)
Carbon Cycle 1
27. Animals that consume green plants (herbivores)
Desert Plants
Primary Consumers
Other Cycles
Dentrified
28. 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
Primary Consumers
Nitrogen
Saprophytes
Sere
29. First to resettle a virgin area
Tropical Rain Forest Plants
Competition Same Niche 3
Pioneer Organism
Aphotic Zone
30. Determines the nature of plant and animal life in the soil
Aphotic Zone
Substratum (soil/rock)
Nitrogen Cycle 2
Hypotonic
31. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Hypotonic
Temperate Coniferous Plants
Intertidal Zone Population
Food Chain
32. Polar bears - musk oxen - and arctic hens
Pioneer Organism
Mutualims
Ecology
Thundra Animals
33. Algae - crabs - crustacea - and many different species of fish
Biotic Environment
Deep-sea Organisms
Desert Plants
Littoral Zone Populations
34. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Nitrogen
Photic Zone
Successive Communities
Niche
35. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Biome
Taiga Biome
Producers
Nitrogen Cycle 3
36. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Physical Environment-Temperature
Predator-Prey relationship
Heterotrophs
Sere
37. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Carbon Cycle 3
Polar Region
Benthos
Pyramid of Mass
38. 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
Scavengers
Pyramid of Mass
Pyramid of Energy
Carnivores
39. Crawling and sessile organsms
Dominant Species
Taiga Plants
Benthos
Herbivores
40. Animals that consume dead animals
Pyramid of Energy
Scavengers
Temperate Coniferous Forest Biome
Second Law of Thermodynamics
41. 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
Nitrogen cycle 1
Desert Biome
Physical Environment- Water
Species
42. 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
Pyramid of Energy
Abiotic (Physical) Environment
Second Law of Thermodynamics
Intertidal Zone Population
43. Consists of populations of different plants and animal species interacting with each other in a given environment
Substratum-Minerals
Communities
Photic Zone
Temperate Deciduous Forest Animals
44. 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
Nitrogen Cycle 2
Tertiary Consumers
Climate and weather
Symbionts
45. Include saprophytic organisms and organisms of decay
Temperate Deciduous Forest Plants
Tropical Rain Forest Animals
Decomposer
Littoral Zone
46. The oceans
Decomposer
Hydrosphere
Taiga Biome
Species
47. Two fates await the ammonia (NH3). some are nitrified or dentrified
Sere
Epiphytes
Nitrogen Cycle 5
Organism
48. Regiong beneatht he photic zone that receives no light
Pioneer Organism
Temperate Deciduous Forest Biome
Aphotic Zone
Aquatic Biomes
49. Rivers - lakes - ponds - and marshes
Taiga Biome
Freshwater Biomes
Intertidal Zone Population
Deep-sea Organisms
50. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Marshes
Substratum-Minerals
Littoral Zone
Competition