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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. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Successive Communities
Environmental Factors
Taiga Biome
Grassland Animals
2. Two species may rapidly evolve in divergent directions under the strong selection pressure resulting from intense competition. thus - the two species would rapidly evolve greater differences in their niches
Nitrogen cycle 1
Competition Same Niche 3
Desert Plants
Temperate Deciduous Forest Animals
3. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Species
Pioneer Organism
Biotic Environment
Tropical Rain Forest Plants
4. Rock and soil surface
Temperate Deciduous Forest Animals
Herbivores
Lithosphere
Freshwater Biomes
5. When a parasite benefits at the expense of the host
Parasitism
Littoral Zone
Intertidal Zone Population
Nitrogen Cycle 5
6. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Dentrified
Aphotic Zone animals
Mutualims
Nitrogen Cycle 4
7. Any group of similar organisms that are capable of reproducing
Species
Tertiary Consumers
Marshes
Pyramid of Energy
8. 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
Photic zone
Biotic Environment
Photic Zone animals
Competition Same Niche 2
9. 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
Nitrogen
Temperate Coniferous Forest Biome
Aphotic Zone
Species
10. Integrated system of species that are dependent upon one another for survival
Intertidal Zone Population
Symbionts
Pyramid of Mass
Community
11. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Nature of Biomes
Community
Aquatic Biomes
Food Chain
12. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Competition Same Niche 3
Photic zone
Tropical Rain Forest Biome
Biosphere
13. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Biotic Environment
Nitrogen Cycle 5
Pyramid of Numbers
Pioneer Organism
14. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Deep-sea Organisms
Biosphere
Other Cycles
Community
15. Developed long legs and many are hoofed
Poikilothermic (Cold Blooded)
Aquatic Biomes
Grassland Animals
Carbon Cycle 2
16. One that exerts control over the other species that are present
Hypotonic
Dominant Species
Environmental Factors
Pelagic Zone
17. Lichens and moss
Hemeothermic (Warm Blooded)
Competition Same Niche 2
Taiga Animals
Tundra Plants
18. Links between oceans and land
Material Cycles
Marshes
Obligatory
Photic zone
19. Gaseous CO2 enters the living world when plants use it to produce glucose via photosynthesis. The carbon atoms in CO2 are bonded to hydrogen and other carbon atoms. the plant uses the glucose to make starch - proteins - and fat
Carbon Cycle 1
Tundra Biome
Communities
Producers
20. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Heterotrophs
Saprophytes
Tundra Biome
Pyramid of Energy
21. Vegetation such as vines and eppiphytes
Nitrogen Cycle 3
Coimax Vegetatioin
Food Pyramids
Tropical Rain Forest Plants
22. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Biotic Environment
Littoral Zone Populations
Substratum-Humus
Tropical Rain Forest Animals
23. The vegetation that becomes dominant and stable after years of evolutiionary development
Abiotic (Physical) Environment
Conditions for stability in an Ecosystem
Coimax Vegetatioin
Communities
24. 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
Climate and weather
Benthos
Lithosphere
Physical Environment-Sunlight
25. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Ecological Succession
Second Law of Thermodynamics
Polar Region
Lithosphere
26. Include saprophytic organisms and organisms of decay
Decomposer
Rootlike holdfasts
Biosphere
Pelagic Zone
27. First to resettle a virgin area
Parasitism
Desert animals
Pioneer Organism
Biosphere
28. Recycle water - oxygen - and phosphorus
Other Cycles
Nitrogen Cycle 2
Thundra Animals
Temperate Deciduous Forest Biome
29. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Secondary Consumers
Aphotic Zone
Temperate Deciduous Forest Biome
Other Cycles
30. 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
Desert Biome
Photic zone
Ecology
31. 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
Predator-Prey relationship
Pyramid of Mass
Photic Zone animals
Intraspecific Interactions
32. Animals that consume only plants or plant foods
Successive Communities
Herbivores
Climate and weather
Tropical Rain Forest Animals
33. Used to include only the population and not their physical environment
Physical Environment-Sunlight
Tropical Rain Forest Animals
Biotic Community
Environmental Factors
34. Needs constant energy source and cycling of materials between the living system
Conditions for stability in an Ecosystem
Biotic Environment
Commensalism
Thundra Animals
35. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Substratum-Humus
Material Cycles
Herbivores
Biosphere
36. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Biome
Nitrogen
Food Chain
Communities
37. The ultimate source of energy for all organisms
Polar Region
Nitrogen Cycle 3
Taiga Animals
Physical Environment-Sunlight
38. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Temperate Coniferous Forest Biome
Symbionts
Sere
Pyramid of Energy
39. Distinct community in a geographic region
Carbon Cycle 3
Second Law of Thermodynamics
Biome
Ecosystem
40. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Deep-sea Organisms
Aphotic Zone
Omnivores
Nekton
41. Include reproduction and protection from predators and destructive weather
Nitrogen cycle 1
Cohesive Force
Temperate Deciduous Forest Animals
Osmoregulation
42. Food chain is not a simple linear chain but an intricate web
Substratum (soil/rock)
Successive Communities
Carbon Cycle 3
Food Web
43. 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
Autotrophs
Food Pyramids
Predators
Physical Environment-Sunlight
44. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Nitrogen Cycle 4
Taiga Animals
Hydrosphere
Secondary Consumers
45. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Nitrified
Nitrogen Cycle 2
Tropical Rain Forest Plants
Desert animals
46. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Communities
Mutualims
Predator-Prey relationship
Substratum-Humus
47. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Ecology
Dominant Species
Nitrogen
48. Sunlit layer of the open sea extending to a depth of 250-600ft
Physical Environment-Sunlight
Obligatory
Material Cycles
Photic zone
49. The chief disruptive force
Tropical Rain Forest Animals
Competition
Decomposer
Commensalism
50. Affect the type of vegetation that can be supported
Communities
Substratum-Minerals
Substratum-pH
Secondary Consumers