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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. Only animal life and other heterotrophic life exists
Nitrogen Cycle 5
Aphotic Zone
Temperate Coniferous Plants
Physical Environment-Temperature
2. One that exerts control over the other species that are present
Dominant Species
Saprophytes
Nitrified
Physical Environment-Temperature
3. Distinct community in a geographic region
Temperate Deciduous Forest Biome
Temperate Deciduous Forest Animals
Biome
Primary Consumers
4. Adaptations for maintaining their internal osmolarity and conserving water
Decomposer
Substratum-pH
Osmoregulation
Intertidal Zone
5. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Benthos
Intertidal Zone
Nitrified
Desert Biome
6. 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
Ecological Succession
Species
Rootlike holdfasts
Littoral Zone
7. Every energy transfer involves a loss of energy and each level of the food chain uses some of the energy it obtains from the food for its own metabolism and loses some additional energy in the form of heat
Temperate Deciduous Forest Animals
Nitrogen
Freshwater Biomes
Second Law of Thermodynamics
8. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Pyramid of Energy
Biotic Environment
Tropical Rain Forest Plants
Physical Environment-Temperature
9. Recycle water - oxygen - and phosphorus
Substratum (soil/rock)
Omnivores
Other Cycles
Abiotic (Physical) Environment
10. Determined by the same decisive factors-temperatures and rainfall
Food Chain
Benthos
Marshes
Nature of Biomes
11. Free-living organisms that feed on other living organisms
Community
Substratum-Minerals
Environmental Factors
Predators
12. Includes the community and the environment and usually all five kingdoms
Pyramid of Numbers
Niche
Ecosystem
Predators
13. Sunlit layer of the open sea extending to a depth of 250-600ft
Photic zone
Competition Same Niche 3
Parasitism
Aphotic Zone animals
14. 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
Deep-sea Organisms
Dominant Species
Nitrogen
Intraspecific Interactions
15. Forest floors contain moss and lichens
Taiga Plants
Ecological Succession
Saprophytes
Food Pyramids
16. Any group of similar organisms that are capable of reproducing
Species
Pyramid of Numbers
Scavengers
Sere
17. 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
Nitrified
Competition
Hypotonic
Aquatic Biomes
18. Composed of populations that are able to exist under the new conditions
Benthos
Biotic Environment
Successive Communities
Second Law of Thermodynamics
19. Animals that eat both plants and animals
Nitrogen Cycle 2
Conditions for stability in an Ecosystem
Desert Plants
Omnivores
20. 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
Benthos
Hydrosphere
Producers
21. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Competition Same Niche 2
Photic Zone animals
Aquatic Biomes
Climax Community
22. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Biotic Environment
Secondary Consumers
Nitrogen
Food Chain
23. 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
Tundra Biome
Biosphere
Ecological Succession
Nitrogen Cycle 3
24. Include those protists and fungi that decompose dead organic matter externally and absorb the nutrients - they consistitute a vital link in the cycling of material within the ecosystem
Aphotic Zone animals
Nature of Biomes
Saprophytes
Pelagic Zone
25. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Temperate Coniferous Plants
Carbon Cycle 1
Taiga Animals
Nitrogen
26. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Conditions for stability in an Ecosystem
Commensalism
Marine Biomes
Rootlike holdfasts
27. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Physical Environment- Water
Tropical Rain Forest Animals
Nitrogen cycle 1
Dentrified
28. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Tundra Biome
Tundra Plants
Nitrogen Cycle 4
Hemeothermic (Warm Blooded)
29. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Substratum-Minerals
Polar Region
Heterotrophs
Taiga Biome
30. Conserve water actively
Marshes
Thundra Animals
Desert Plants
Grassland Animals
31. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Second Law of Thermodynamics
Intraspecific Interactions
Temperate Deciduous Forest Biome
Pyramid of Energy
32. Algae - crabs - crustacea - and many different species of fish
Littoral Zone Populations
Scavengers
Secondary Consumers
Heterotrophs
33. The vegetation that becomes dominant and stable after years of evolutiionary development
Climax Community
Omnivores
Desert Plants
Coimax Vegetatioin
34. Regiong beneatht he photic zone that receives no light
Photic zone
Climate and weather
Aphotic Zone
Competition Same Niche 3
35. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Heterotrophs
Thundra Animals
Osmoregulation
Competition Same Niche 3
36. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Substratum (soil/rock)
Poikilothermic (Cold Blooded)
Epiphytes
Mutualims
37. Animals that feed on secondary consumer
Tertiary Consumers
Mutualims
Tropical Rain Forest Plants
Temperate Coniferous Forest Biome
38. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Biosphere
Climax Community
Physical Environment- Water
Communities
39. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Substratum-Minerals
Nitrogen Cycle 4
Littoral Zone Populations
Temperate Deciduous Forest Plants
40. Animals that consume dead animals
Climate and weather
Biosphere
Aphotic Zone animals
Scavengers
41. Animals that only eat other animals -possess pointed teeth and fang-like canine teeth for tearing flesh -have shorter digestive tracts because the easier digestibility of animal food
Ecology
Carnivores
Hemeothermic (Warm Blooded)
Desert Plants
42. Rock and soil surface
Nekton
Substratum-pH
Tundra Biome
Lithosphere
43. Includes climate - temperature - availability of light and water - and the local topology
Deep-sea Organisms
Predator-Prey relationship
Nitrogen
Abiotic (Physical) Environment
44. The study of interactions between organisms and their environment
Ecology
Pyramid of Mass
Substratum-Humus
Tropical Rain Forest Animals
45. Receive less rainfall than the temperate forests - have long - cold winters - and are inhabited by single coniferous tree-the spruce -extreme northern parts of Canada and Russia
Successive Communities
Food Web
Taiga Biome
Obligatory
46. Used to include only the population and not their physical environment
Biotic Community
Parasitism
Carbon Cycle 3
Food Pyramids
47. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Intraspecific Interactions
Substratum-texture
Material Cycles
Carbon Cycle 2
48. Symbiotic relationship from which both organisms derive some benefit
Nitrogen
Successive Communities
Tropical Rain Forest Animals
Mutualims
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
Primary Consumers
Pyramid of Mass
Photic Zone animals
Material Cycles
50. One or both organisms can't survive without the other
Obligatory
Epiphytes
Food Web
Competition Same Niche