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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. Symbiotic relationship from which both organisms derive some benefit
Mutualims
Food Web
Pelagic Zone
Littoral Zone
2. One that exerts control over the other species that are present
Pyramid of Mass
Tundra Plants
Substratum-texture
Dominant Species
3. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Niche
Nitrified
Pioneer Organism
Temperate Coniferous Plants
4. Community in an ecological succession is identified by a dominant species
Community
Sere
Cohesive Force
Photic Zone animals
5. Animals that consume dead animals
Scavengers
Nitrogen Cycle 2
Competition Same Niche 3
Photic Zone animals
6. Determines the nature of plant and animal life in the soil
Primary Consumers
Polar Region
Desert Plants
Substratum (soil/rock)
7. Vegetation such as vines and eppiphytes
Communities
Ecological Succession
Nitrogen
Tropical Rain Forest Plants
8. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Population
Thundra Animals
Herbivores
Epiphytes
9. Includes the community and the environment and usually all five kingdoms
Ecosystem
Saprophytes
Tundra Biome
Littoral Zone
10. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Mutualims
Littoral Zone
Nitrogen Cycle 3
Obligatory
11. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Photic zone
Nekton
Littoral Zone
Physical Environment-Temperature
12. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Tundra Plants
Osmoregulation
Pyramid of Energy
13. One or both organisms can't survive without the other
Obligatory
Scavengers
Tropical Rain Forest Plants
Intertidal Zone
14. Organisms that manufacture their own food
Pyramid of Mass
Sere
Ecology
Autotrophs
15. Links between oceans and land
Marshes
Temperate Coniferous Plants
Deep-sea Organisms
Grassland Animals
16. 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
Substratum (soil/rock)
Competition Same Niche 3
Taiga Animals
Competition Same Niche 2
17. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Lithosphere
Food Pyramids
Intraspecific Interactions
Tropical Rain Forest Animals
18. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Pioneer Organism
Primary Consumers
Polar Region
Substratum-Humus
19. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Heterotrophs
Nitrified
Biosphere
Intraspecific Interactions
20. 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
Pelagic Zone
Desert Biome
Desert Plants
Competition Same Niche 2
21. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Freshwater Biomes
Climax Community
Physical Environment- Water
Pelagic Zone
22. Crawling and sessile organsms
Grassland Biome
Photic Zone animals
Benthos
Intraspecific Interactions
23. 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
Climate and weather
Desert Biome
Biotic Community
Substratum-Humus
24. Receive less than ten inches of rain each year; the rain is concentrated within a few heavy cloudbursts -ex: Sahara in Africa and Gobi in Asia
Desert Biome
Herbivores
Nitrogen
Intertidal Zone
25. Food chain is not a simple linear chain but an intricate web
Food Web
Cohesive Force
Nitrogen
Aphotic Zone animals
26. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Herbivores
Nitrogen Cycle 5
Heterotrophs
Temperate Deciduous Forest Plants
27. 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
Pyramid of Energy
Pyramid of Mass
Ecology
Commensalism
28. One species may be competitively superior to the other and drive the second to extinction
Symbionts
Hypotonic
Carbon Cycle 2
Competition Same Niche
29. The study of interactions between organisms and their environment
Nitrogen cycle 1
Ecology
Temperate Deciduous Forest Plants
Poikilothermic (Cold Blooded)
30. Only animal life and other heterotrophic life exists
Littoral Zone
Desert animals
Desert Biome
Aphotic Zone
31. The chief disruptive force
Tropical Rain Forest Animals
Grassland Biome
Competition
Substratum-texture
32. 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
Environment
Food Pyramids
Littoral Zone Populations
Dentrified
33. Free-living organisms that feed on other living organisms
Population
Predators
Hypotonic
Tundra Biome
34. 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
Population
Heterotrophs
Marine Biomes
35. Encompasses all that is external to the organism and is necessary for its existence
Environment
Heterotrophs
Environmental Factors
Food Web
36. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Cohesive Force
Grassland Biome
Substratum-pH
Predator-Prey relationship
37. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Taiga Plants
Abiotic (Physical) Environment
Substratum-Humus
Taiga Animals
38. Determine by the amount of decaying plant and animal life in the soil
Predators
Desert Plants
Substratum-Humus
Omnivores
39. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Photic Zone animals
Pyramid of Energy
Photic zone
Substratum-Minerals
40. Animals that consume primary consumers (carnivores)
Tropical Rain Forest Plants
Secondary Consumers
Tundra Biome
Taiga Plants
41. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Nitrogen
Food Web
Substratum-Minerals
Niche
42. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Pyramid of Mass
Climate and weather
Littoral Zone
Parasitism
43. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Rootlike holdfasts
Nitrogen
Saprophytes
Nitrogen Cycle 2
44. 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
Environmental Factors
Decomposer
Nitrogen Cycle 4
Epiphytes
45. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Food Pyramids
Biosphere
Competition Same Niche
Tropical Rain Forest Biome
46. The vegetation that becomes dominant and stable after years of evolutiionary development
Food Web
Grassland Biome
Coimax Vegetatioin
Nitrogen Cycle 2
47. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Nitrogen Cycle 4
Pioneer Organism
Photic Zone animals
Organism
48. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Temperate Deciduous Forest Biome
Poikilothermic (Cold Blooded)
Pelagic Zone
Tertiary Consumers
49. Consists of populations of different plants and animal species interacting with each other in a given environment
Communities
Aphotic Zone
Intertidal Zone
Desert animals
50. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Temperate Deciduous Forest Plants
Taiga Plants
Tropical Rain Forest Biome
Temperate Coniferous Plants