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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. The oceans
Physical Environment- Water
Temperate Deciduous Forest Animals
Hydrosphere
Environmental Factors
2. Animals that eat both plants and animals
Omnivores
Substratum-Humus
Obligatory
Communities
3. 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
Pioneer Organism
Competition Same Niche 2
Pyramid of Energy
Niche
4. Any group of similar organisms that are capable of reproducing
Species
Lithosphere
Tundra Biome
Population
5. 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
Taiga Biome
Commensalism
Littoral Zone
Aquatic Biomes
6. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Producers
Epiphytes
Nitrified
Photic zone
7. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Aphotic Zone
Conditions for stability in an Ecosystem
Epiphytes
Herbivores
8. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Temperate Coniferous Forest Biome
Coimax Vegetatioin
Omnivores
9. Recycle water - oxygen - and phosphorus
Photic zone
Other Cycles
Photic Zone animals
Pelagic Zone
10. Composed of populations that are able to exist under the new conditions
Predator-Prey relationship
Omnivores
Photic Zone
Successive Communities
11. Determines the nature of plant and animal life in the soil
Substratum (soil/rock)
Substratum-texture
Nekton
Marine Biomes
12. 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
Dentrified
Intertidal Zone
Temperate Coniferous Plants
Competition Same Niche 3
13. One or both organisms can't survive without the other
Climax Community
Secondary Consumers
Obligatory
Biotic Environment
14. Animals that consume green plants (herbivores)
Desert Biome
Dentrified
Competition Same Niche 3
Primary Consumers
15. Symbiotic relationship from which both organisms derive some benefit
Deep-sea Organisms
Competition Same Niche
Environment
Mutualims
16. Vegetation such as vines and eppiphytes
Tropical Rain Forest Plants
Substratum-pH
Carnivores
Scavengers
17. Links between oceans and land
Marshes
Polar Region
Ecology
Saprophytes
18. Only animal life and other heterotrophic life exists
Successive Communities
Tropical Rain Forest Plants
Marine Biomes
Aphotic Zone
19. When a parasite benefits at the expense of the host
Temperate Deciduous Forest Biome
Cohesive Force
Substratum-pH
Parasitism
20. Freshwater Biomes vs. Saltwater 1: Freshwater is _______________ which results in the passage of water into the cell. Freshwater organisms have homeostatic mechanisms to maintain water balance by the regular removal of the excess water. these include
Epiphytes
Pyramid of Numbers
Taiga Plants
Hypotonic
21. 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
Ecology
Aquatic Biomes
Temperate Deciduous Forest Animals
Coimax Vegetatioin
22. Include reproduction and protection from predators and destructive weather
Food Chain
Cohesive Force
Predators
Biotic Environment
23. 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
Ecological Succession
Carbon Cycle 1
Aquatic Biomes
Carbon Cycle 2
24. 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
Tundra Biome
Taiga Animals
Polar Region
Nitrogen cycle 1
25. Food chain is not a simple linear chain but an intricate web
Freshwater Biomes
Photic Zone animals
Food Web
Aphotic Zone
26. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Desert Biome
Biosphere
Tropical Rain Forest Animals
Second Law of Thermodynamics
27. 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
Competition
Niche
Saprophytes
Decomposer
28. Includes the community and the environment and usually all five kingdoms
Ecosystem
Competition Same Niche 3
Secondary Consumers
Pioneer Organism
29. Algae - crabs - crustacea - and many different species of fish
Littoral Zone Populations
Poikilothermic (Cold Blooded)
Symbionts
Grassland Animals
30. Encompasses all that is external to the organism and is necessary for its existence
Carbon Cycle 2
Temperate Deciduous Forest Animals
Environment
Other Cycles
31. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Intraspecific Interactions
Obligatory
Tropical Rain Forest Plants
Nitrogen Cycle 2
32. Region typical of the open seas and can be divided into photic and aphotic zones
Nitrogen Cycle 3
Pelagic Zone
Food Web
Nitrogen Cycle 4
33. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Taiga Plants
Ecological Succession
Carbon Cycle 2
Intertidal Zone
34. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Deep-sea Organisms
Niche
Epiphytes
Aquatic Biomes
35. Rock and soil surface
Lithosphere
Aphotic Zone
Biosphere
Climax Community
36. Conserve water actively
Ecology
Desert Plants
Tundra Plants
Nitrogen Cycle 4
37. 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
Food Chain
Competition Same Niche 3
Carbon Cycle 1
Pyramid of Energy
38. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Temperate Deciduous Forest Plants
Symbionts
Competition Same Niche 2
39. 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
Food Chain
Rootlike holdfasts
Intertidal Zone
Aphotic Zone
40. Deer - fox - woodchuck - and squirrel
Temperate Deciduous Forest Animals
Physical Environment-Temperature
Substratum-pH
Secondary Consumers
41. Animals that consume primary consumers (carnivores)
Dentrified
Secondary Consumers
Abiotic (Physical) Environment
Photic Zone
42. 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
Hypotonic
Population
Abiotic (Physical) Environment
43. Regiong beneatht he photic zone that receives no light
Competition Same Niche 3
Dominant Species
Conditions for stability in an Ecosystem
Aphotic Zone
44. Free-living organisms that feed on other living organisms
Organism
Desert Biome
Predators
Producers
45. Determine by the amount of decaying plant and animal life in the soil
Littoral Zone
Substratum-Humus
Material Cycles
Carnivores
46. The chief disruptive force
Competition
Omnivores
Grassland Animals
Biosphere
47. Organisms that manufacture their own food
Thundra Animals
Autotrophs
Tundra Plants
Saprophytes
48. 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
Temperate Coniferous Plants
Decomposer
Nature of Biomes
Nitrogen Cycle 4
49. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Abiotic (Physical) Environment
Ecology
Nitrified
Taiga Plants
50. First to resettle a virgin area
Pioneer Organism
Carnivores
Littoral Zone
Tropical Rain Forest Plants