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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. Deer - fox - woodchuck - and squirrel
Poikilothermic (Cold Blooded)
Desert Plants
Niche
Temperate Deciduous Forest Animals
2. Includes the community and the environment and usually all five kingdoms
Predator-Prey relationship
Autotrophs
Ecosystem
Community
3. One species may be competitively superior to the other and drive the second to extinction
Intertidal Zone Population
Competition Same Niche
Nitrogen Cycle 2
Substratum-pH
4. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Desert Biome
Biosphere
Taiga Animals
Intertidal Zone Population
5. Used to include only the population and not their physical environment
Nitrogen Cycle 2
Biotic Community
Dominant Species
Photic zone
6. When a parasite benefits at the expense of the host
Food Chain
Parasitism
Food Pyramids
Pyramid of Energy
7. Integrated system of species that are dependent upon one another for survival
Temperate Coniferous Forest Biome
Hemeothermic (Warm Blooded)
Community
Food Web
8. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Taiga Plants
Pelagic Zone
Climax Community
Mutualims
9. The study of interactions between organisms and their environment
Carnivores
Secondary Consumers
Nitrogen Cycle 2
Ecology
10. Any group of similar organisms that are capable of reproducing
Ecosystem
Heterotrophs
Species
Second Law of Thermodynamics
11. Determines water holding capacity
Ecosystem
Dentrified
Grassland Biome
Substratum-texture
12. Vegetation such as vines and eppiphytes
Mutualims
Nekton
Tropical Rain Forest Plants
Organism
13. Rock and soil surface
Dominant Species
Lithosphere
Littoral Zone Populations
Ecological Succession
14. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Photic Zone animals
Tropical Rain Forest Biome
Ecology
Nitrogen Cycle 4
15. 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
Producers
Species
Aphotic Zone
Temperate Coniferous Forest Biome
16. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Other Cycles
Tertiary Consumers
Parasitism
Nekton
17. Food chain is not a simple linear chain but an intricate web
Food Web
Other Cycles
Nitrogen Cycle 2
Heterotrophs
18. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Photic Zone
Substratum-texture
Ecological Succession
Organism
19. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Aphotic Zone
Epiphytes
Aquatic Biomes
Substratum-pH
20. Forest floors contain moss and lichens
Taiga Plants
Temperate Coniferous Plants
Sere
Osmoregulation
21. Animals that consume green plants (herbivores)
Biotic Community
Primary Consumers
Substratum (soil/rock)
Aphotic Zone
22. Characterized by low rainfall - although considerably more than the desert biomes receive -provide no shelter for herbivorous mammals from carnivorous predators -ex: East of the Rockies - steppes of the Ukraine - and the pampas of Argentina
Grassland Biome
Hemeothermic (Warm Blooded)
Nitrogen Cycle 4
Taiga Biome
23. 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
Coimax Vegetatioin
Parasitism
Tertiary Consumers
Pyramid of Energy
24. The major component of the internal environment of all living things
Temperate Coniferous Forest Biome
Physical Environment- Water
Ecosystem
Sere
25. Rhododendrons and pines are more suited for growth in acid oil
Substratum-pH
Commensalism
Taiga Biome
Substratum-Minerals
26. First to resettle a virgin area
Desert Plants
Pioneer Organism
Environmental Factors
Sere
27. Animals that consume primary consumers (carnivores)
Biotic Community
Tropical Rain Forest Plants
Tropical Rain Forest Animals
Secondary Consumers
28. Composed of populations that are able to exist under the new conditions
Ecosystem
Successive Communities
Substratum-Humus
Hypotonic
29. Gaseous CO2 enters the living world when plants use it to produce glucose via photosynthesis. The carbon atoms in CO2 are bonded to hydrogen and other carbon atoms. the plant uses the glucose to make starch - proteins - and fat
Carbon Cycle 1
Benthos
Dominant Species
Autotrophs
30. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Nitrified
Pyramid of Numbers
Secondary Consumers
Aphotic Zone
31. 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
Successive Communities
Biotic Environment
Nitrogen Cycle 3
32. 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
Niche
Temperate Deciduous Forest Animals
Nitrogen
Ecology
33. 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
Intraspecific Interactions
Cohesive Force
Marshes
Tundra Biome
34. Links between oceans and land
Marshes
Tundra Biome
Niche
Aquatic Biomes
35. One that exerts control over the other species that are present
Tropical Rain Forest Biome
Dominant Species
Nitrogen Cycle 5
Primary Consumers
36. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Environment
Herbivores
Competition Same Niche 2
Photic Zone animals
37. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Intertidal Zone
Substratum-Humus
Substratum (soil/rock)
Heterotrophs
38. The ultimate source of energy for all organisms
Temperate Coniferous Forest Biome
Epiphytes
Primary Consumers
Physical Environment-Sunlight
39. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Poikilothermic (Cold Blooded)
Mutualims
Competition Same Niche 2
Ecological Succession
40. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Desert animals
Substratum-Minerals
Environmental Factors
Freshwater Biomes
41. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Photic Zone animals
Carnivores
Nitrogen
Commensalism
42. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Tundra Plants
Ecology
Abiotic (Physical) Environment
43. The vegetation that becomes dominant and stable after years of evolutiionary development
Population
Lithosphere
Coimax Vegetatioin
Nekton
44. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Aphotic Zone
Physical Environment-Temperature
Freshwater Biomes
Heterotrophs
45. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Lithosphere
Taiga Plants
Polar Region
Ecosystem
46. Distinct community in a geographic region
Biome
Aphotic Zone
Tertiary Consumers
Nature of Biomes
47. 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
Dominant Species
Nitrogen Cycle 4
Competition Same Niche
Biotic Environment
48. Encompasses all that is external to the organism and is necessary for its existence
Nitrified
Deep-sea Organisms
Environment
Nature of Biomes
49. Consists of populations of different plants and animal species interacting with each other in a given environment
Symbionts
Communities
Other Cycles
Population
50. Determine by the amount of decaying plant and animal life in the soil
Tertiary Consumers
Competition Same Niche 2
Hydrosphere
Substratum-Humus