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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. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Aphotic Zone animals
Substratum (soil/rock)
Hemeothermic (Warm Blooded)
Nitrogen
2. Consists of populations of different plants and animal species interacting with each other in a given environment
Symbionts
Autotrophs
Communities
Nitrogen cycle 1
3. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Desert Biome
Pelagic Zone
Poikilothermic (Cold Blooded)
Hydrosphere
4. Determines water holding capacity
Taiga Plants
Substratum-texture
Aphotic Zone animals
Dentrified
5. The study of interactions between organisms and their environment
Commensalism
Ecology
Successive Communities
Other Cycles
6. 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
Environment
Taiga Biome
Tundra Plants
Environmental Factors
7. 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
Physical Environment-Sunlight
Climate and weather
Tropical Rain Forest Plants
Coimax Vegetatioin
8. 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
Abiotic (Physical) Environment
Tundra Plants
Littoral Zone
Pyramid of Mass
9. Developed long legs and many are hoofed
Commensalism
Grassland Animals
Herbivores
Pyramid of Energy
10. Composed of populations that are able to exist under the new conditions
Successive Communities
Deep-sea Organisms
Autotrophs
Ecological Succession
11. Lichens and moss
Tundra Plants
Polar Region
Competition Same Niche 2
Thundra Animals
12. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Food Chain
Hydrosphere
Marine Biomes
Predator-Prey relationship
13. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Thundra Animals
Food Pyramids
Ecology
Temperate Deciduous Forest Plants
14. The vegetation that becomes dominant and stable after years of evolutiionary development
Food Chain
Tropical Rain Forest Plants
Coimax Vegetatioin
Climax Community
15. The ultimate source of energy for all organisms
Other Cycles
Taiga Plants
Physical Environment-Sunlight
Marine Biomes
16. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Pelagic Zone
Tropical Rain Forest Biome
Intertidal Zone
Autotrophs
17. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Littoral Zone
Polar Region
Herbivores
Lithosphere
18. Adaptations for maintaining their internal osmolarity and conserving water
Desert Plants
Osmoregulation
Predators
Ecology
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
Rootlike holdfasts
Species
Coimax Vegetatioin
Intertidal Zone
20. Includes the community and the environment and usually all five kingdoms
Substratum-Humus
Temperate Deciduous Forest Plants
Environmental Factors
Ecosystem
21. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Carbon Cycle 3
Nitrogen Cycle 2
Ecosystem
Climax Community
22. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Food Pyramids
Nitrogen
Aphotic Zone
Predator-Prey relationship
23. Free-living organisms that feed on other living organisms
Environmental Factors
Epiphytes
Decomposer
Predators
24. Rhododendrons and pines are more suited for growth in acid oil
Producers
Substratum-pH
Lithosphere
Carbon Cycle 1
25. 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
Substratum-Humus
Photic Zone animals
Tundra Biome
Hypotonic
26. 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
Temperate Deciduous Forest Biome
Tertiary Consumers
Niche
Aquatic Biomes
27. Vegetation such as vines and eppiphytes
Nitrified
Tundra Biome
Tropical Rain Forest Plants
Marine Biomes
28. 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
Food Pyramids
Photic zone
Marshes
Intertidal Zone
29. Animals that consume primary consumers (carnivores)
Secondary Consumers
Osmoregulation
Pelagic Zone
Taiga Plants
30. 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
Thundra Animals
Carbon Cycle 2
Competition Same Niche 2
Saprophytes
31. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Omnivores
Deep-sea Organisms
Secondary Consumers
Polar Region
32. Used to include only the population and not their physical environment
Conditions for stability in an Ecosystem
Temperate Deciduous Forest Plants
Biotic Community
Communities
33. The major component of the internal environment of all living things
Substratum-Minerals
Aphotic Zone animals
Physical Environment- Water
Heterotrophs
34. Encompasses all that is external to the organism and is necessary for its existence
Substratum-Humus
Aquatic Biomes
Ecological Succession
Environment
35. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Dentrified
Climate and weather
Tundra Biome
Saprophytes
36. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Heterotrophs
Tropical Rain Forest Animals
Polar Region
Secondary Consumers
37. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Substratum-Humus
Benthos
Coimax Vegetatioin
38. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Material Cycles
Poikilothermic (Cold Blooded)
Desert animals
Nitrified
39. 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
Intraspecific Interactions
Taiga Animals
Lithosphere
Tundra Biome
40. Links between oceans and land
Marshes
Temperate Coniferous Forest Biome
Physical Environment- Water
Osmoregulation
41. Includes climate - temperature - availability of light and water - and the local topology
Substratum-Humus
Climate and weather
Biotic Environment
Abiotic (Physical) Environment
42. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Decomposer
Scavengers
Producers
Pelagic Zone
43. The oceans
Desert animals
Substratum (soil/rock)
Tropical Rain Forest Biome
Hydrosphere
44. Determines the nature of plant and animal life in the soil
Osmoregulation
Substratum (soil/rock)
Physical Environment-Temperature
Substratum-texture
45. Conserve water actively
Nature of Biomes
Desert Plants
Commensalism
Sere
46. Group of organisms of the same species living together in a given location
Taiga Biome
Polar Region
Decomposer
Population
47. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Photic Zone
Biosphere
Epiphytes
Tundra Biome
48. Include saprophytic organisms and organisms of decay
Sere
Decomposer
Tundra Plants
Hydrosphere
49. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Temperate Coniferous Forest Biome
Successive Communities
Physical Environment-Temperature
Species
50. Animals that consume only plants or plant foods
Food Chain
Tertiary Consumers
Conditions for stability in an Ecosystem
Herbivores