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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. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Temperate Deciduous Forest Biome
Community
Decomposer
Benthos
2. Animals that consume primary consumers (carnivores)
Marine Biomes
Substratum-pH
Temperate Coniferous Forest Biome
Secondary Consumers
3. Include saprophytic organisms and organisms of decay
Predator-Prey relationship
Aphotic Zone animals
Environmental Factors
Decomposer
4. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Tropical Rain Forest Animals
Dentrified
Epiphytes
Pyramid of Numbers
5. 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
Deep-sea Organisms
Grassland Biome
Tundra Biome
Temperate Coniferous Forest Biome
6. Rivers - lakes - ponds - and marshes
Aquatic Biomes
Carbon Cycle 3
Nitrogen
Freshwater Biomes
7. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Substratum-Humus
Temperate Coniferous Plants
Deep-sea Organisms
Lithosphere
8. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Physical Environment-Temperature
Nekton
Food Chain
Tundra Biome
9. 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
Nitrogen cycle 1
Nitrogen
Benthos
Polar Region
10. 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
Dentrified
Scavengers
Aphotic Zone
Pyramid of Mass
11. Encompasses all that is external to the organism and is necessary for its existence
Climax Community
Physical Environment-Temperature
Omnivores
Environment
12. 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
Biotic Community
Carnivores
Intraspecific Interactions
Freshwater Biomes
13. Symbiotic relationship from which both organisms derive some benefit
Epiphytes
Mutualims
Benthos
Photic Zone
14. 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
Predator-Prey relationship
Substratum-Humus
Nitrified
Rootlike holdfasts
15. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Taiga Biome
Climax Community
Thundra Animals
Substratum-pH
16. Group of organisms of the same species living together in a given location
Population
Tundra Plants
Grassland Biome
Carnivores
17. Deer - fox - woodchuck - and squirrel
Population
Competition Same Niche
Temperate Deciduous Forest Animals
Nitrogen Cycle 3
18. 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
Nitrogen Cycle 3
Hydrosphere
Carbon Cycle 1
Epiphytes
19. One that exerts control over the other species that are present
Predator-Prey relationship
Communities
Dominant Species
Grassland Biome
20. Animals that consume only plants or plant foods
Hydrosphere
Herbivores
Tropical Rain Forest Plants
Epiphytes
21. Determines the nature of plant and animal life in the soil
Desert animals
Ecosystem
Pyramid of Energy
Substratum (soil/rock)
22. Include reproduction and protection from predators and destructive weather
Coimax Vegetatioin
Secondary Consumers
Cohesive Force
Intertidal Zone Population
23. Used to include only the population and not their physical environment
Littoral Zone
Mutualims
Coimax Vegetatioin
Biotic Community
24. Conserve water actively
Competition
Desert Plants
Taiga Biome
Rootlike holdfasts
25. Any group of similar organisms that are capable of reproducing
Substratum-texture
Substratum-pH
Species
Pyramid of Numbers
26. 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
Temperate Coniferous Forest Biome
Tundra Plants
Tropical Rain Forest Biome
27. Animals that feed on secondary consumer
Dentrified
Tertiary Consumers
Polar Region
Littoral Zone Populations
28. Distinct community in a geographic region
Population
Nitrified
Biome
Parasitism
29. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Marine Biomes
Sere
Photic Zone animals
Nitrogen
30. 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
Marine Biomes
Littoral Zone Populations
Coimax Vegetatioin
31. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Obligatory
Nitrogen Cycle 3
Hemeothermic (Warm Blooded)
Ecological Succession
32. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Nekton
Biosphere
Cohesive Force
Ecology
33. Recycle water - oxygen - and phosphorus
Climate and weather
Food Pyramids
Communities
Other Cycles
34. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Producers
Aphotic Zone animals
Predators
Marine Biomes
35. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Food Web
Predator-Prey relationship
Biosphere
Tundra Plants
36. 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
Osmoregulation
Climate and weather
Lithosphere
Intertidal Zone
37. 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
Nitrogen
Saprophytes
Decomposer
Secondary Consumers
38. Affect the type of vegetation that can be supported
Competition
Substratum-Minerals
Predator-Prey relationship
Desert Biome
39. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Sere
Photic zone
Intertidal Zone Population
Hypotonic
40. When a parasite benefits at the expense of the host
Temperate Coniferous Forest Biome
Parasitism
Physical Environment- Water
Temperate Deciduous Forest Plants
41. Links between oceans and land
Physical Environment-Temperature
Marshes
Lithosphere
Niche
42. Free-living organisms that feed on other living organisms
Predators
Tundra Plants
Abiotic (Physical) Environment
Temperate Deciduous Forest Plants
43. Two fates await the ammonia (NH3). some are nitrified or dentrified
Pyramid of Mass
Pioneer Organism
Thundra Animals
Nitrogen Cycle 5
44. The major component of the internal environment of all living things
Photic zone
Community
Physical Environment- Water
Heterotrophs
45. Rock and soil surface
Lithosphere
Tundra Biome
Marine Biomes
Grassland Animals
46. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Tertiary Consumers
Material Cycles
Heterotrophs
Substratum-pH
47. The ultimate source of energy for all organisms
Aphotic Zone
Physical Environment-Sunlight
Nitrogen Cycle 2
Species
48. Includes the community and the environment and usually all five kingdoms
Ecosystem
Aphotic Zone
Sere
Lithosphere
49. 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
Nature of Biomes
Competition
Competition Same Niche 3
Marshes
50. When one organism is benefited by the association and the other is not affected
Photic zone
Commensalism
Herbivores
Conditions for stability in an Ecosystem