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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. Community in an ecological succession is identified by a dominant species
Aphotic Zone
Tropical Rain Forest Animals
Sere
Producers
2. Adaptations for maintaining their internal osmolarity and conserving water
Symbionts
Conditions for stability in an Ecosystem
Coimax Vegetatioin
Osmoregulation
3. 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
Nitrogen Cycle 5
Competition Same Niche
Material Cycles
Aquatic Biomes
4. Animals that eat both plants and animals
Coimax Vegetatioin
Omnivores
Heterotrophs
Benthos
5. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Deep-sea Organisms
Nitrified
Hemeothermic (Warm Blooded)
Photic Zone
6. The chief disruptive force
Competition
Biotic Community
Nekton
Aphotic Zone
7. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Heterotrophs
Marine Biomes
Conditions for stability in an Ecosystem
Second Law of Thermodynamics
8. Includes climate - temperature - availability of light and water - and the local topology
Photic Zone
Heterotrophs
Abiotic (Physical) Environment
Nitrogen
9. Consists of populations of different plants and animal species interacting with each other in a given environment
Communities
Rootlike holdfasts
Pyramid of Numbers
Substratum-texture
10. Rivers - lakes - ponds - and marshes
Freshwater Biomes
Food Chain
Pyramid of Energy
Cohesive Force
11. Forest floors contain moss and lichens
Carbon Cycle 1
Physical Environment- Water
Grassland Biome
Taiga Plants
12. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Epiphytes
Intertidal Zone
Producers
Pelagic Zone
13. One that exerts control over the other species that are present
Food Web
Environment
Dominant Species
Nitrogen Cycle 4
14. Regiong beneatht he photic zone that receives no light
Benthos
Aphotic Zone
Thundra Animals
Dominant Species
15. 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
Substratum (soil/rock)
Pyramid of Mass
Food Pyramids
16. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Symbionts
Intertidal Zone
Grassland Biome
Species
17. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Predator-Prey relationship
Physical Environment- Water
Aquatic Biomes
Food Chain
18. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Hemeothermic (Warm Blooded)
Symbionts
Second Law of Thermodynamics
Poikilothermic (Cold Blooded)
19. Animals that consume only plants or plant foods
Deep-sea Organisms
Herbivores
Conditions for stability in an Ecosystem
Parasitism
20. When one organism is benefited by the association and the other is not affected
Pioneer Organism
Commensalism
Tropical Rain Forest Biome
Substratum (soil/rock)
21. 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
Carbon Cycle 2
Biome
Pyramid of Energy
Coimax Vegetatioin
22. Deer - fox - woodchuck - and squirrel
Carbon Cycle 2
Temperate Deciduous Forest Animals
Obligatory
Environment
23. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Desert animals
Nitrogen Cycle 3
Nekton
Competition Same Niche
24. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Climax Community
Ecosystem
Substratum-Humus
Nekton
25. The vegetation that becomes dominant and stable after years of evolutiionary development
Coimax Vegetatioin
Carnivores
Nekton
Other Cycles
26. Links between oceans and land
Scavengers
Aquatic Biomes
Material Cycles
Marshes
27. Vegetation such as vines and eppiphytes
Heterotrophs
Tropical Rain Forest Plants
Producers
Dentrified
28. 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
Tropical Rain Forest Plants
Temperate Deciduous Forest Biome
Commensalism
Competition Same Niche 3
29. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Biome
Competition Same Niche 2
Material Cycles
Intertidal Zone Population
30. The oceans
Hydrosphere
Temperate Coniferous Plants
Temperate Deciduous Forest Animals
Rootlike holdfasts
31. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Carbon Cycle 1
Lithosphere
Producers
Dominant Species
32. Distinct community in a geographic region
Biome
Ecosystem
Physical Environment-Temperature
Physical Environment-Sunlight
33. 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
Tropical Rain Forest Plants
Tundra Biome
Nitrified
Grassland Biome
34. Includes the community and the environment and usually all five kingdoms
Carbon Cycle 3
Population
Substratum-Humus
Ecosystem
35. Polar bears - musk oxen - and arctic hens
Thundra Animals
Ecology
Coimax Vegetatioin
Tertiary Consumers
36. 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
Secondary Consumers
Polar Region
Desert Biome
Pyramid of Energy
37. Used to include only the population and not their physical environment
Substratum-Humus
Temperate Deciduous Forest Biome
Biotic Community
Marshes
38. Any group of similar organisms that are capable of reproducing
Temperate Deciduous Forest Plants
Marine Biomes
Species
Nitrogen cycle 1
39. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Desert Plants
Tropical Rain Forest Plants
Ecological Succession
Autotrophs
40. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Tropical Rain Forest Biome
Dominant Species
Food Pyramids
Littoral Zone
41. Crawling and sessile organsms
Second Law of Thermodynamics
Nitrogen Cycle 5
Predators
Benthos
42. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Environment
Intraspecific Interactions
Physical Environment-Temperature
Littoral Zone Populations
43. Animals that consume primary consumers (carnivores)
Biosphere
Osmoregulation
Biome
Secondary Consumers
44. Animals that feed on secondary consumer
Environment
Lithosphere
Temperate Deciduous Forest Biome
Tertiary Consumers
45. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Photic zone
Nature of Biomes
Physical Environment-Sunlight
Biotic Environment
46. Region typical of the open seas and can be divided into photic and aphotic zones
Food Pyramids
Pelagic Zone
Tropical Rain Forest Biome
Carbon Cycle 2
47. Composed of populations that are able to exist under the new conditions
Intraspecific Interactions
Temperate Coniferous Plants
Successive Communities
Organism
48. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Species
Aphotic Zone
Dentrified
Obligatory
49. Because organisms at the upper levels of the food chain derive their food energy from organisms at lower levels - and because energy is lost from one level to the next - each level can support a successively smaller biomass
Deep-sea Organisms
Pyramid of Mass
Environmental Factors
Food Web
50. Affect the type of vegetation that can be supported
Substratum-Minerals
Substratum-Humus
Tundra Plants
Food Web