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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. Nekton and benthos - scavengers - and predators (fiercely competitive)
Carnivores
Desert Plants
Thundra Animals
Aphotic Zone animals
2. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Climate and weather
Temperate Coniferous Forest Biome
Epiphytes
Polar Region
3. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Tundra Plants
Littoral Zone
Predator-Prey relationship
Nitrogen Cycle 4
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
Temperate Coniferous Forest Biome
Nitrogen
Polar Region
Food Pyramids
5. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Environmental Factors
Conditions for stability in an Ecosystem
Heterotrophs
Organism
6. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Pyramid of Numbers
Pioneer Organism
Physical Environment-Sunlight
Ecological Succession
7. Include reproduction and protection from predators and destructive weather
Cohesive Force
Abiotic (Physical) Environment
Nekton
Nitrogen Cycle 3
8. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Desert Biome
Polar Region
Competition Same Niche 3
Nitrogen Cycle 5
9. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Nitrogen Cycle 2
Environment
Taiga Animals
Deep-sea Organisms
10. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Intertidal Zone Population
Desert Biome
Population
Temperate Deciduous Forest Biome
11. Organisms that manufacture their own food
Autotrophs
Conditions for stability in an Ecosystem
Photic Zone animals
Pelagic Zone
12. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Osmoregulation
Lithosphere
Rootlike holdfasts
13. Composed of populations that are able to exist under the new conditions
Food Pyramids
Communities
Successive Communities
Biotic Environment
14. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Grassland Animals
Biotic Environment
Substratum-texture
Photic Zone animals
15. Integrated system of species that are dependent upon one another for survival
Community
Aphotic Zone animals
Tertiary Consumers
Lithosphere
16. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Community
Hemeothermic (Warm Blooded)
Taiga Animals
Substratum-pH
17. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Temperate Coniferous Plants
Commensalism
Carbon Cycle 1
Marine Biomes
18. 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
Pioneer Organism
Nitrogen Cycle 3
Tundra Biome
Climax Community
19. 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
Thundra Animals
Nitrogen Cycle 4
Environmental Factors
Marine Biomes
20. Links between oceans and land
Competition
Substratum-Humus
Marshes
Climax Community
21. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Pyramid of Numbers
Material Cycles
Population
Ecological Succession
22. Encompasses all that is external to the organism and is necessary for its existence
Desert Biome
Communities
Environment
Photic zone
23. Includes the community and the environment and usually all five kingdoms
Nitrified
Desert Plants
Food Web
Ecosystem
24. More than 70% of earth -plants have little controlling influence in communities -most stable ecosystems; the conditions affecting temperature - amount of available oxygen and cabon dioxide - and amount of suspended or dissolve materials are very stab
Aquatic Biomes
Climate and weather
Hemeothermic (Warm Blooded)
Abiotic (Physical) Environment
25. 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
Physical Environment-Temperature
Carbon Cycle 2
Pyramid of Numbers
Nitrogen Cycle 5
26. Animals that consume dead animals
Herbivores
Littoral Zone
Scavengers
Tropical Rain Forest Plants
27. Symbiotic relationship from which both organisms derive some benefit
Tropical Rain Forest Biome
Nitrogen cycle 1
Mutualims
Competition
28. Polar bears - musk oxen - and arctic hens
Littoral Zone
Thundra Animals
Dentrified
Desert Plants
29. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Climate and weather
Predators
Taiga Animals
Temperate Deciduous Forest Plants
30. Recycle water - oxygen - and phosphorus
Scavengers
Sere
Secondary Consumers
Other Cycles
31. 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
Taiga Animals
Pioneer Organism
Food Web
32. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Littoral Zone Populations
Marine Biomes
Tropical Rain Forest Animals
Conditions for stability in an Ecosystem
33. The chief disruptive force
Physical Environment-Sunlight
Competition
Other Cycles
Temperate Deciduous Forest Plants
34. Affect the type of vegetation that can be supported
Cohesive Force
Substratum-Minerals
Nitrogen
Physical Environment- Water
35. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Population
Intertidal Zone
Photic Zone
Food Chain
36. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Tundra Plants
Climax Community
Population
Rootlike holdfasts
37. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Primary Consumers
Pyramid of Numbers
Environmental Factors
Benthos
38. Crawling and sessile organsms
Tropical Rain Forest Biome
Aphotic Zone
Benthos
Ecological Succession
39. One species may be competitively superior to the other and drive the second to extinction
Desert animals
Pyramid of Energy
Competition Same Niche
Autotrophs
40. Determine by the amount of decaying plant and animal life in the soil
Tropical Rain Forest Biome
Nitrogen Cycle 4
Substratum-Humus
Grassland Animals
41. Lichens and moss
Communities
Tundra Biome
Deep-sea Organisms
Tundra Plants
42. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Herbivores
Freshwater Biomes
Nitrogen
Substratum-texture
43. Only animal life and other heterotrophic life exists
Substratum-Humus
Aphotic Zone
Parasitism
Desert Plants
44. Animals that consume primary consumers (carnivores)
Parasitism
Photic zone
Secondary Consumers
Climax Community
45. Forest floors contain moss and lichens
Coimax Vegetatioin
Secondary Consumers
Taiga Plants
Littoral Zone
46. Animals that consume green plants (herbivores)
Nature of Biomes
Polar Region
Primary Consumers
Aquatic Biomes
47. 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
Abiotic (Physical) Environment
Freshwater Biomes
Intraspecific Interactions
Competition
48. Needs constant energy source and cycling of materials between the living system
Conditions for stability in an Ecosystem
Physical Environment-Sunlight
Taiga Animals
Ecological Succession
49. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Grassland Animals
Desert Biome
Photic Zone
Nitrogen Cycle 2
50. Rivers - lakes - ponds - and marshes
Predators
Other Cycles
Freshwater Biomes
Community
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