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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. Rock and soil surface
Saprophytes
Omnivores
Lithosphere
Nitrogen
2. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Predator-Prey relationship
Desert animals
Population
Marshes
3. Two fates await the ammonia (NH3). some are nitrified or dentrified
Tropical Rain Forest Plants
Nitrogen Cycle 5
Poikilothermic (Cold Blooded)
Other Cycles
4. 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
Competition Same Niche
Intraspecific Interactions
Physical Environment- Water
Ecosystem
5. Vegetation such as vines and eppiphytes
Littoral Zone
Tropical Rain Forest Plants
Commensalism
Heterotrophs
6. 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
Food Pyramids
Communities
Temperate Deciduous Forest Animals
7. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Food Chain
Thundra Animals
Nitrogen Cycle 3
Organism
8. Community in an ecological succession is identified by a dominant species
Nitrogen Cycle 4
Hemeothermic (Warm Blooded)
Nekton
Sere
9. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Climax Community
Heterotrophs
Producers
Conditions for stability in an Ecosystem
10. Lichens and moss
Tundra Plants
Nitrogen Cycle 2
Physical Environment-Temperature
Community
11. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Species
Tropical Rain Forest Plants
Pioneer Organism
Poikilothermic (Cold Blooded)
12. Algae - crabs - crustacea - and many different species of fish
Nitrogen cycle 1
Littoral Zone Populations
Hydrosphere
Nature of Biomes
13. 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
Temperate Deciduous Forest Biome
Coimax Vegetatioin
Tundra Biome
Nitrogen Cycle 3
14. 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
Coimax Vegetatioin
Temperate Coniferous Plants
Competition Same Niche 3
Niche
15. 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
Primary Consumers
Nature of Biomes
Thundra Animals
Pyramid of Mass
16. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Environmental Factors
Organism
Biotic Community
Epiphytes
17. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Nitrified
Benthos
Aphotic Zone animals
Climate and weather
18. The oceans
Substratum-Humus
Hydrosphere
Dentrified
Symbionts
19. Consists of populations of different plants and animal species interacting with each other in a given environment
Predator-Prey relationship
Tertiary Consumers
Communities
Tropical Rain Forest Animals
20. Animals that consume dead animals
Nitrogen cycle 1
Tundra Plants
Scavengers
Taiga Plants
21. 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 Animals
Nitrified
Carbon Cycle 1
Carbon Cycle 2
22. Group of organisms of the same species living together in a given location
Species
Rootlike holdfasts
Population
Photic zone
23. The vegetation that becomes dominant and stable after years of evolutiionary development
Communities
Coimax Vegetatioin
Population
Commensalism
24. One or both organisms can't survive without the other
Benthos
Tropical Rain Forest Animals
Obligatory
Osmoregulation
25. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Intertidal Zone Population
Mutualims
Food Web
Temperate Deciduous Forest Biome
26. 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
Autotrophs
Carnivores
Marine Biomes
Taiga Animals
27. Affect the type of vegetation that can be supported
Other Cycles
Substratum-Minerals
Pyramid of Energy
Photic Zone
28. Recycle water - oxygen - and phosphorus
Symbionts
Saprophytes
Other Cycles
Sere
29. Organisms that manufacture their own food
Niche
Intertidal Zone Population
Autotrophs
Taiga Animals
30. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Deep-sea Organisms
Biosphere
Ecological Succession
Biotic Environment
31. Symbiotic relationship from which both organisms derive some benefit
Mutualims
Niche
Second Law of Thermodynamics
Substratum (soil/rock)
32. The ultimate source of energy for all organisms
Autotrophs
Nitrogen Cycle 3
Aquatic Biomes
Physical Environment-Sunlight
33. Developed long legs and many are hoofed
Niche
Mutualims
Grassland Animals
Epiphytes
34. Encompasses all that is external to the organism and is necessary for its existence
Community
Ecosystem
Environment
Nitrogen
35. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Deep-sea Organisms
Tropical Rain Forest Animals
Mutualims
Marshes
36. 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
Saprophytes
Primary Consumers
Nitrogen Cycle 4
Predators
37. Include saprophytic organisms and organisms of decay
Scavengers
Second Law of Thermodynamics
Decomposer
Aquatic Biomes
38. Every energy transfer involves a loss of energy and each level of the food chain uses some of the energy it obtains from the food for its own metabolism and loses some additional energy in the form of heat
Nitrogen Cycle 5
Substratum (soil/rock)
Aphotic Zone animals
Second Law of Thermodynamics
39. The study of interactions between organisms and their environment
Tropical Rain Forest Animals
Saprophytes
Ecology
Pelagic Zone
40. Animals that feed on secondary consumer
Tertiary Consumers
Nitrogen Cycle 4
Poikilothermic (Cold Blooded)
Predator-Prey relationship
41. 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
Biosphere
Cohesive Force
Temperate Coniferous Forest Biome
Substratum (soil/rock)
42. 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
Pyramid of Mass
Ecology
Autotrophs
Taiga Biome
43. Determine by the amount of decaying plant and animal life in the soil
Substratum-Humus
Nature of Biomes
Substratum-Minerals
Nitrogen Cycle 4
44. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Tropical Rain Forest Biome
Community
Hydrosphere
Autotrophs
45. 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
Tropical Rain Forest Plants
Desert Plants
Grassland Biome
Pyramid of Energy
46. Forest floors contain moss and lichens
Taiga Plants
Material Cycles
Coimax Vegetatioin
Commensalism
47. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Physical Environment- Water
Tropical Rain Forest Plants
Ecological Succession
Environmental Factors
48. One that exerts control over the other species that are present
Parasitism
Conditions for stability in an Ecosystem
Dominant Species
Carbon Cycle 2
49. Only animal life and other heterotrophic life exists
Thundra Animals
Pelagic Zone
Aphotic Zone
Substratum (soil/rock)
50. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Secondary Consumers
Rootlike holdfasts
Temperate Deciduous Forest Plants
Climax Community