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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
Niche
Temperate Deciduous Forest Biome
Communities
Omnivores
2. 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
Taiga Animals
Saprophytes
Heterotrophs
3. Determines water holding capacity
Symbionts
Environmental Factors
Substratum-texture
Cohesive Force
4. Integrated system of species that are dependent upon one another for survival
Intertidal Zone
Community
Heterotrophs
Aphotic Zone
5. 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
Rootlike holdfasts
Niche
Primary Consumers
Intertidal Zone
6. One species may be competitively superior to the other and drive the second to extinction
Climax Community
Competition Same Niche
Food Pyramids
Nitrogen Cycle 5
7. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Littoral Zone
Nitrogen Cycle 5
Tropical Rain Forest Biome
Climax Community
8. Crawling and sessile organsms
Intertidal Zone
Lithosphere
Nitrogen
Benthos
9. Recycle water - oxygen - and phosphorus
Other Cycles
Successive Communities
Community
Competition
10. Affect the type of vegetation that can be supported
Niche
Pyramid of Mass
Deep-sea Organisms
Substratum-Minerals
11. Deer - fox - woodchuck - and squirrel
Poikilothermic (Cold Blooded)
Temperate Deciduous Forest Animals
Osmoregulation
Littoral Zone
12. 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 Cycle 2
Material Cycles
Saprophytes
Other Cycles
13. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Freshwater Biomes
Carbon Cycle 3
Tropical Rain Forest Animals
Intertidal Zone
14. The chief disruptive force
Grassland Biome
Climate and weather
Rootlike holdfasts
Competition
15. Determined by the same decisive factors-temperatures and rainfall
Other Cycles
Nature of Biomes
Rootlike holdfasts
Herbivores
16. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Hydrosphere
Symbionts
Marine Biomes
Poikilothermic (Cold Blooded)
17. Food chain is not a simple linear chain but an intricate web
Nitrogen Cycle 3
Polar Region
Food Web
Competition Same Niche
18. The vegetation that becomes dominant and stable after years of evolutiionary development
Coimax Vegetatioin
Poikilothermic (Cold Blooded)
Carbon Cycle 1
Temperate Coniferous Forest Biome
19. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Communities
Predator-Prey relationship
Polar Region
Tundra Plants
20. The study of interactions between organisms and their environment
Photic Zone animals
Predator-Prey relationship
Food Pyramids
Ecology
21. 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
Tertiary Consumers
Intertidal Zone Population
Scavengers
Niche
22. 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
Pyramid of Mass
Lithosphere
Pelagic Zone
23. Lichens and moss
Tundra Plants
Competition Same Niche
Littoral Zone Populations
Epiphytes
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
Temperate Deciduous Forest Biome
Population
Littoral Zone
Desert Biome
25. 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
Primary Consumers
Parasitism
Desert Biome
Nitrogen Cycle 4
26. 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
Physical Environment- Water
Material Cycles
Aquatic Biomes
Littoral Zone Populations
27. The ultimate source of energy for all organisms
Photic zone
Physical Environment-Sunlight
Thundra Animals
Rootlike holdfasts
28. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Parasitism
Nature of Biomes
Nitrogen Cycle 2
Physical Environment-Sunlight
29. Free-living organisms that feed on other living organisms
Tundra Plants
Ecosystem
Predators
Nekton
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
Niche
Substratum (soil/rock)
Photic zone
Carbon Cycle 2
31. Conserve water actively
Desert Plants
Rootlike holdfasts
Hydrosphere
Communities
32. 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
Tertiary Consumers
Nitrogen cycle 1
Substratum-texture
Environment
33. Determine by the amount of decaying plant and animal life in the soil
Substratum-Humus
Predator-Prey relationship
Substratum-texture
Desert Plants
34. Used to include only the population and not their physical environment
Biotic Community
Photic Zone
Aphotic Zone animals
Biotic Environment
35. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Tropical Rain Forest Animals
Material Cycles
Omnivores
Temperate Coniferous Forest Biome
36. Organisms that manufacture their own food
Autotrophs
Osmoregulation
Desert animals
Desert Plants
37. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Dominant Species
Biosphere
Taiga Animals
Thundra Animals
38. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Organism
Community
Tundra Plants
Environment
39. Rivers - lakes - ponds - and marshes
Successive Communities
Herbivores
Littoral Zone
Freshwater Biomes
40. Nekton and benthos - scavengers - and predators (fiercely competitive)
Physical Environment-Sunlight
Taiga Animals
Carnivores
Aphotic Zone animals
41. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Photic Zone animals
Tundra Biome
Secondary Consumers
42. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Thundra Animals
Hemeothermic (Warm Blooded)
Material Cycles
Aphotic Zone
43. Sunlit layer of the open sea extending to a depth of 250-600ft
Photic zone
Scavengers
Hydrosphere
Successive Communities
44. Composed of populations that are able to exist under the new conditions
Secondary Consumers
Decomposer
Successive Communities
Nitrogen Cycle 3
45. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Littoral Zone
Producers
Substratum-pH
Carbon Cycle 1
46. Animals that consume green plants (herbivores)
Desert Plants
Primary Consumers
Substratum-texture
Aphotic Zone
47. Encompasses all that is external to the organism and is necessary for its existence
Poikilothermic (Cold Blooded)
Environment
Lithosphere
Food Pyramids
48. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Food Web
Dominant Species
Nitrogen Cycle 3
Ecological Succession
49. First to resettle a virgin area
Communities
Dominant Species
Carbon Cycle 2
Pioneer Organism
50. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Marshes
Substratum-Minerals
Tropical Rain Forest Plants
Nitrogen