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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. 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
Producers
Physical Environment- Water
Thundra Animals
Grassland Biome
2. Community in an ecological succession is identified by a dominant species
Sere
Species
Environmental Factors
Biosphere
3. Needs constant energy source and cycling of materials between the living system
Competition
Obligatory
Littoral Zone Populations
Conditions for stability in an Ecosystem
4. (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
Biotic Environment
Competition
Aphotic Zone
5. Deer - fox - woodchuck - and squirrel
Nitrogen cycle 1
Ecological Succession
Temperate Deciduous Forest Animals
Tundra Plants
6. 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
Biome
Coimax Vegetatioin
Photic Zone
Intraspecific Interactions
7. Polar bears - musk oxen - and arctic hens
Photic zone
Lithosphere
Osmoregulation
Thundra Animals
8. Crawling and sessile organsms
Climax Community
Benthos
Desert animals
Competition Same Niche 3
9. Distinct community in a geographic region
Decomposer
Biome
Cohesive Force
Abiotic (Physical) Environment
10. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Heterotrophs
Food Pyramids
Physical Environment-Sunlight
Physical Environment- Water
11. Freshwater Biomes vs. Saltwater 2: In rivers and streams - strong swift currents exist - and thus fish that have developed strong muscles and plants with _____________ have survived
Rootlike holdfasts
Temperate Deciduous Forest Animals
Substratum-texture
Littoral Zone
12. Affect the type of vegetation that can be supported
Biotic Community
Hydrosphere
Poikilothermic (Cold Blooded)
Substratum-Minerals
13. Determines the nature of plant and animal life in the soil
Aphotic Zone animals
Environmental Factors
Substratum (soil/rock)
Nitrogen Cycle 2
14. Determined by the same decisive factors-temperatures and rainfall
Mutualims
Nitrogen Cycle 4
Nature of Biomes
Biotic Community
15. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Species
Intertidal Zone
Tropical Rain Forest Biome
Desert Plants
16. Includes climate - temperature - availability of light and water - and the local topology
Substratum-Humus
Tropical Rain Forest Animals
Abiotic (Physical) Environment
Desert Biome
17. The vegetation that becomes dominant and stable after years of evolutiionary development
Desert animals
Substratum (soil/rock)
Coimax Vegetatioin
Ecology
18. Determine by the amount of decaying plant and animal life in the soil
Substratum-Humus
Marshes
Food Chain
Competition Same Niche
19. Adaptations for maintaining their internal osmolarity and conserving water
Intraspecific Interactions
Osmoregulation
Substratum (soil/rock)
Successive Communities
20. The chief disruptive force
Competition
Primary Consumers
Predator-Prey relationship
Physical Environment-Sunlight
21. Symbiotic relationship from which both organisms derive some benefit
Commensalism
Mutualims
Photic Zone animals
Lithosphere
22. 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
Sere
Predator-Prey relationship
Osmoregulation
Climate and weather
23. Animals that feed on secondary consumer
Tertiary Consumers
Predator-Prey relationship
Predators
Marshes
24. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Producers
Tropical Rain Forest Biome
Deep-sea Organisms
Littoral Zone Populations
25. Free-living organisms that feed on other living organisms
Desert Biome
Predators
Benthos
Littoral Zone
26. Developed long legs and many are hoofed
Grassland Animals
Food Chain
Dentrified
Niche
27. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Sere
Nature of Biomes
Marshes
Material Cycles
28. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Taiga Plants
Intraspecific Interactions
Pyramid of Numbers
Nitrogen Cycle 5
29. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Temperate Coniferous Plants
Other Cycles
Obligatory
Nitrogen cycle 1
30. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Hypotonic
Epiphytes
Material Cycles
Heterotrophs
31. Animals that eat both plants and animals
Deep-sea Organisms
Competition Same Niche 3
Omnivores
Carbon Cycle 3
32. 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
Heterotrophs
Pyramid of Numbers
Biotic Community
33. Group of organisms of the same species living together in a given location
Food Chain
Aquatic Biomes
Climax Community
Population
34. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Conditions for stability in an Ecosystem
Nitrogen Cycle 2
Dominant Species
Ecological Succession
35. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Pelagic Zone
Symbionts
Marshes
Littoral Zone Populations
36. Animals that consume dead animals
Biome
Desert Biome
Scavengers
Desert Plants
37. Only animal life and other heterotrophic life exists
Aphotic Zone
Temperate Coniferous Plants
Epiphytes
Substratum-Humus
38. The oceans
Hydrosphere
Cohesive Force
Biome
Substratum (soil/rock)
39. First to resettle a virgin area
Nature of Biomes
Nitrified
Pioneer Organism
Polar Region
40. 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
Littoral Zone Populations
Climax Community
Carbon Cycle 2
Temperate Deciduous Forest Plants
41. 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
Nitrogen Cycle 3
Producers
Carbon Cycle 3
Desert Biome
42. 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
Climate and weather
Substratum-texture
Competition Same Niche 2
Communities
43. Two fates await the ammonia (NH3). some are nitrified or dentrified
Tertiary Consumers
Conditions for stability in an Ecosystem
Poikilothermic (Cold Blooded)
Nitrogen Cycle 5
44. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Intertidal Zone
Producers
Carbon Cycle 2
Tertiary Consumers
45. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Dentrified
Grassland Biome
Photic zone
Physical Environment- Water
46. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Intertidal Zone Population
Predator-Prey relationship
Obligatory
Aquatic Biomes
47. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Tropical Rain Forest Animals
Predators
Physical Environment- Water
Intraspecific Interactions
48. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Physical Environment-Sunlight
Secondary Consumers
Epiphytes
Nitrogen
49. When one organism is benefited by the association and the other is not affected
Tundra Plants
Commensalism
Food Web
Saprophytes
50. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Temperate Deciduous Forest Plants
Predator-Prey relationship
Substratum-Humus
Nekton