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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. 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
Nitrogen
Photic zone
Photic Zone
Desert Biome
2. Deer - fox - woodchuck - and squirrel
Pelagic Zone
Physical Environment-Sunlight
Pioneer Organism
Temperate Deciduous Forest Animals
3. 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
Decomposer
Saprophytes
Hydrosphere
Temperate Coniferous Forest Biome
4. Free-living organisms that feed on other living organisms
Successive Communities
Predators
Coimax Vegetatioin
Conditions for stability in an Ecosystem
5. Rhododendrons and pines are more suited for growth in acid oil
Substratum-pH
Herbivores
Intertidal Zone Population
Desert Biome
6. 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
Obligatory
Dentrified
Niche
Substratum-pH
7. First to resettle a virgin area
Substratum (soil/rock)
Temperate Deciduous Forest Animals
Tundra Biome
Pioneer Organism
8. Include saprophytic organisms and organisms of decay
Obligatory
Decomposer
Food Web
Nature of Biomes
9. Encompasses all that is external to the organism and is necessary for its existence
Competition Same Niche 2
Environment
Other Cycles
Tundra Plants
10. Used to include only the population and not their physical environment
Substratum-texture
Biotic Community
Ecology
Abiotic (Physical) Environment
11. Adaptations for maintaining their internal osmolarity and conserving water
Population
Climax Community
Osmoregulation
Grassland Animals
12. 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
Hypotonic
Desert Biome
Tundra Plants
Taiga Plants
13. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Pioneer Organism
Deep-sea Organisms
Polar Region
Ecological Succession
14. Animals that consume green plants (herbivores)
Mutualims
Intraspecific Interactions
Primary Consumers
Substratum-Minerals
15. Determined by the same decisive factors-temperatures and rainfall
Nature of Biomes
Material Cycles
Tropical Rain Forest Plants
Temperate Deciduous Forest Plants
16. The major component of the internal environment of all living things
Primary Consumers
Nitrified
Intraspecific Interactions
Physical Environment- Water
17. When one organism is benefited by the association and the other is not affected
Abiotic (Physical) Environment
Temperate Deciduous Forest Biome
Commensalism
Substratum-Humus
18. Animals that consume primary consumers (carnivores)
Coimax Vegetatioin
Secondary Consumers
Intertidal Zone
Substratum-Minerals
19. 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
Competition Same Niche
Temperate Deciduous Forest Plants
Freshwater Biomes
Rootlike holdfasts
20. Integrated system of species that are dependent upon one another for survival
Carbon Cycle 3
Nekton
Climate and weather
Community
21. 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
Competition Same Niche 3
Ecology
Predators
Nitrogen
22. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Nekton
Nitrogen Cycle 2
Primary Consumers
Temperate Deciduous Forest Animals
23. Regiong beneatht he photic zone that receives no light
Niche
Other Cycles
Aphotic Zone
Nitrogen Cycle 4
24. 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
Nitrogen Cycle 4
Aphotic Zone
Competition Same Niche 3
Secondary Consumers
25. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Marine Biomes
Pyramid of Numbers
Secondary Consumers
Community
26. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Nitrogen Cycle 2
Nature of Biomes
Ecology
Tropical Rain Forest Plants
27. Includes climate - temperature - availability of light and water - and the local topology
Abiotic (Physical) Environment
Food Pyramids
Tropical Rain Forest Animals
Nitrogen Cycle 3
28. 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
Competition Same Niche
Benthos
Carbon Cycle 3
Hemeothermic (Warm Blooded)
29. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Food Web
Primary Consumers
Temperate Deciduous Forest Plants
Communities
30. 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
Conditions for stability in an Ecosystem
Food Pyramids
Physical Environment-Temperature
Grassland Animals
31. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Physical Environment- Water
Population
Tropical Rain Forest Biome
32. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Hydrosphere
Nitrogen cycle 1
Photic Zone
Tropical Rain Forest Animals
33. Symbiotic relationship from which both organisms derive some benefit
Mutualims
Marine Biomes
Successive Communities
Carbon Cycle 3
34. Any group of similar organisms that are capable of reproducing
Autotrophs
Taiga Biome
Tundra Plants
Species
35. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Hydrosphere
Taiga Plants
Heterotrophs
Competition Same Niche
36. Animals that feed on secondary consumer
Temperate Coniferous Forest Biome
Heterotrophs
Successive Communities
Tertiary Consumers
37. Includes the community and the environment and usually all five kingdoms
Ecosystem
Intertidal Zone Population
Competition
Marine Biomes
38. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Epiphytes
Photic Zone animals
Primary Consumers
Predator-Prey relationship
39. 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
Thundra Animals
Polar Region
Tundra Plants
40. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Substratum (soil/rock)
Tertiary Consumers
Osmoregulation
41. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Primary Consumers
Biosphere
Tundra Biome
Environmental Factors
42. Consists of populations of different plants and animal species interacting with each other in a given environment
Communities
Marine Biomes
Carbon Cycle 3
Physical Environment-Temperature
43. Animals that consume dead animals
Temperate Coniferous Forest Biome
Scavengers
Desert animals
Nitrogen Cycle 5
44. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Nitrogen Cycle 3
Thundra Animals
Substratum-Minerals
Desert Plants
45. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Environmental Factors
Symbionts
Carnivores
Successive Communities
46. Nekton and benthos - scavengers - and predators (fiercely competitive)
Successive Communities
Pyramid of Energy
Hypotonic
Aphotic Zone animals
47. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Temperate Deciduous Forest Animals
Food Pyramids
Aphotic Zone
Deep-sea Organisms
48. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Second Law of Thermodynamics
Food Chain
Environmental Factors
Aphotic Zone
49. 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
Thundra Animals
Hydrosphere
Dentrified
Intraspecific Interactions
50. Polar bears - musk oxen - and arctic hens
Predator-Prey relationship
Thundra Animals
Aquatic Biomes
Marshes