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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. Integrated system of species that are dependent upon one another for survival
Abiotic (Physical) Environment
Community
Grassland Biome
Parasitism
2. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Material Cycles
Species
Pyramid of Numbers
Biotic Community
3. When one organism is benefited by the association and the other is not affected
Competition Same Niche 3
Biome
Rootlike holdfasts
Commensalism
4. Vegetation such as vines and eppiphytes
Material Cycles
Tropical Rain Forest Plants
Nitrogen cycle 1
Aquatic Biomes
5. Consists of populations of different plants and animal species interacting with each other in a given environment
Intertidal Zone
Temperate Deciduous Forest Biome
Communities
Biotic Community
6. The vegetation that becomes dominant and stable after years of evolutiionary development
Temperate Coniferous Forest Biome
Coimax Vegetatioin
Nature of Biomes
Taiga Biome
7. Affect the type of vegetation that can be supported
Coimax Vegetatioin
Taiga Animals
Obligatory
Substratum-Minerals
8. Polar bears - musk oxen - and arctic hens
Commensalism
Intertidal Zone Population
Organism
Thundra Animals
9. Needs constant energy source and cycling of materials between the living system
Conditions for stability in an Ecosystem
Ecological Succession
Mutualims
Polar Region
10. 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
Competition Same Niche
Decomposer
Desert Biome
Food Pyramids
11. 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
Intertidal Zone
Competition Same Niche 3
Producers
Nekton
12. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Nature of Biomes
Photic Zone
Littoral Zone
Nitrogen Cycle 5
13. Adaptations for maintaining their internal osmolarity and conserving water
Osmoregulation
Successive Communities
Saprophytes
Food Web
14. Elemental nitrogen is chemically inert and cannot be used by most organisms. Lightning and nitrogen-fixing bacteria in the roots of legumes change the nitrogen into the usable - soluble nitrates
Conditions for stability in an Ecosystem
Nitrogen cycle 1
Commensalism
Photic Zone animals
15. Only animal life and other heterotrophic life exists
Aphotic Zone
Temperate Coniferous Forest Biome
Temperate Deciduous Forest Animals
Climax Community
16. One species may be competitively superior to the other and drive the second to extinction
Competition Same Niche
Food Chain
Tundra Biome
Tundra Plants
17. Rock and soil surface
Pelagic Zone
Lithosphere
Scavengers
Tundra Biome
18. 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
Community
Carnivores
Temperate Coniferous Forest Biome
Intertidal Zone
19. Include saprophytic organisms and organisms of decay
Decomposer
Intraspecific Interactions
Grassland Biome
Temperate Deciduous Forest Biome
20. The study of interactions between organisms and their environment
Ecology
Niche
Competition Same Niche
Poikilothermic (Cold Blooded)
21. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Deep-sea Organisms
Ecosystem
Pyramid of Numbers
Climax Community
22. 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
Pioneer Organism
Aphotic Zone
Competition Same Niche 3
Aquatic Biomes
23. Conserve water actively
Other Cycles
Thundra Animals
Desert Plants
Grassland Animals
24. 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
Dominant Species
Communities
Rootlike holdfasts
Symbionts
25. Used to include only the population and not their physical environment
Biotic Community
Obligatory
Tropical Rain Forest Plants
Aphotic Zone animals
26. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Osmoregulation
Scavengers
Intertidal Zone
Material Cycles
27. Animals that eat both plants and animals
Omnivores
Environment
Predators
Desert animals
28. 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
Saprophytes
Cohesive Force
Biome
Desert Biome
29. Animals that consume primary consumers (carnivores)
Pioneer Organism
Competition Same Niche 3
Tropical Rain Forest Plants
Secondary Consumers
30. 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
Parasitism
Tropical Rain Forest Plants
Pyramid of Energy
Biotic Environment
31. 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
Tropical Rain Forest Plants
Organism
Carbon Cycle 1
Biotic Environment
32. One species may be competitively superior in some regions - and the other may be superior in other regions under different environmental conditions. this would result in the elimination of one species in some places and the other in other places
Commensalism
Competition
Osmoregulation
Competition Same Niche 2
33. Include reproduction and protection from predators and destructive weather
Cohesive Force
Photic Zone animals
Intertidal Zone
Thundra Animals
34. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Commensalism
Food Chain
Desert animals
Epiphytes
35. 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
Photic zone
Biome
Epiphytes
Taiga Biome
36. Determine by the amount of decaying plant and animal life in the soil
Taiga Plants
Substratum-Humus
Species
Biotic Community
37. Animals eat plants and use the digested nutrients to form carbohydrates - fats - and proteins characteristic of the species. a part of these organic compounds is used as fuel in respiration in plants and animals
Carbon Cycle 2
Dentrified
Pioneer Organism
Nekton
38. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Polar Region
Desert Plants
Population
Food Chain
39. Composed of populations that are able to exist under the new conditions
Heterotrophs
Successive Communities
Predator-Prey relationship
Population
40. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Littoral Zone Populations
Competition Same Niche 2
Dominant Species
41. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Desert animals
Hypotonic
Climax Community
Temperate Coniferous Plants
42. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Biome
Climax Community
Ecosystem
Desert Biome
43. Developed long legs and many are hoofed
Hypotonic
Grassland Animals
Dentrified
Photic Zone animals
44. One that exerts control over the other species that are present
Dominant Species
Photic zone
Abiotic (Physical) Environment
Commensalism
45. Includes climate - temperature - availability of light and water - and the local topology
Marshes
Abiotic (Physical) Environment
Substratum-texture
Environment
46. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Temperate Coniferous Plants
Predator-Prey relationship
Biotic Community
Organism
47. Encompasses all that is external to the organism and is necessary for its existence
Intraspecific Interactions
Dominant Species
Environment
Hemeothermic (Warm Blooded)
48. Rhododendrons and pines are more suited for growth in acid oil
Dominant Species
Pyramid of Energy
Physical Environment-Sunlight
Substratum-pH
49. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Nitrogen Cycle 3
Ecological Succession
Taiga Plants
Tropical Rain Forest Animals
50. Links between oceans and land
Organism
Intraspecific Interactions
Carnivores
Marshes