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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. Forest floors contain moss and lichens
Taiga Plants
Substratum-Humus
Competition Same Niche 3
Littoral Zone
2. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Photic Zone
Rootlike holdfasts
Nitrified
Mutualims
3. Consists of populations of different plants and animal species interacting with each other in a given environment
Biotic Environment
Carbon Cycle 1
Communities
Autotrophs
4. Determines the nature of plant and animal life in the soil
Substratum (soil/rock)
Commensalism
Nitrogen cycle 1
Community
5. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Hypotonic
Tropical Rain Forest Animals
Photic Zone animals
Physical Environment-Temperature
6. Nekton and benthos - scavengers - and predators (fiercely competitive)
Desert animals
Second Law of Thermodynamics
Ecology
Aphotic Zone animals
7. 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
Food Pyramids
Nitrogen
Species
Symbionts
8. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Temperate Coniferous Forest Biome
Producers
Physical Environment- Water
Nitrogen Cycle 2
9. Include saprophytic organisms and organisms of decay
Decomposer
Species
Material Cycles
Cohesive Force
10. One species may be competitively superior to the other and drive the second to extinction
Tropical Rain Forest Plants
Temperate Coniferous Plants
Biosphere
Competition Same Niche
11. 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
Climate and weather
Tundra Plants
Carbon Cycle 1
Food Pyramids
12. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Nitrified
Polar Region
Heterotrophs
Temperate Coniferous Plants
13. 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
Competition Same Niche 2
Substratum-Minerals
Taiga Biome
Nitrified
14. Links between oceans and land
Hemeothermic (Warm Blooded)
Biotic Environment
Tertiary Consumers
Marshes
15. Community in an ecological succession is identified by a dominant species
Food Pyramids
Other Cycles
Sere
Substratum-pH
16. 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
Mutualims
Nitrogen cycle 1
Temperate Deciduous Forest Animals
Substratum-pH
17. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Intertidal Zone Population
Temperate Deciduous Forest Plants
Intraspecific Interactions
Tundra Plants
18. Group of organisms of the same species living together in a given location
Population
Nitrogen
Nitrogen Cycle 2
Nitrogen Cycle 4
19. 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
Pioneer Organism
Nitrogen Cycle 2
Nitrogen Cycle 5
Saprophytes
20. Algae - crabs - crustacea - and many different species of fish
Littoral Zone Populations
Benthos
Successive Communities
Substratum-texture
21. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Secondary Consumers
Rootlike holdfasts
Substratum-texture
Hemeothermic (Warm Blooded)
22. Any group of similar organisms that are capable of reproducing
Primary Consumers
Species
Obligatory
Biotic Community
23. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Desert animals
Littoral Zone
Organism
Nitrogen Cycle 5
24. Animals that consume dead animals
Scavengers
Intertidal Zone
Species
Hemeothermic (Warm Blooded)
25. Two fates await the ammonia (NH3). some are nitrified or dentrified
Tundra Plants
Nitrogen Cycle 5
Carnivores
Physical Environment-Sunlight
26. 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
Temperate Deciduous Forest Animals
Deep-sea Organisms
Hypotonic
Nitrogen
27. 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
Tropical Rain Forest Animals
Temperate Deciduous Forest Animals
Cohesive Force
Carbon Cycle 2
28. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Physical Environment-Temperature
Symbionts
Biotic Environment
Mutualims
29. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Tropical Rain Forest Plants
Taiga Plants
Heterotrophs
Herbivores
30. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Littoral Zone Populations
Carbon Cycle 3
Nitrogen Cycle 5
Tropical Rain Forest Biome
31. 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
Aquatic Biomes
Dentrified
Producers
Intertidal Zone
32. Organisms that manufacture their own food
Carbon Cycle 1
Tropical Rain Forest Animals
Pioneer Organism
Autotrophs
33. Food chain is not a simple linear chain but an intricate web
Substratum-pH
Food Web
Nitrogen Cycle 5
Biome
34. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Carbon Cycle 3
Deep-sea Organisms
Coimax Vegetatioin
Epiphytes
35. Composed of populations that are able to exist under the new conditions
Omnivores
Successive Communities
Osmoregulation
Decomposer
36. Rhododendrons and pines are more suited for growth in acid oil
Grassland Biome
Osmoregulation
Substratum-pH
Physical Environment- Water
37. 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
Physical Environment-Temperature
Competition Same Niche
Competition Same Niche 3
Nitrogen cycle 1
38. Rock and soil surface
Photic zone
Lithosphere
Competition Same Niche
Climax Community
39. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Substratum-pH
Tropical Rain Forest Animals
Competition Same Niche
Nekton
40. Polar bears - musk oxen - and arctic hens
Tertiary Consumers
Food Web
Biotic Environment
Thundra Animals
41. One that exerts control over the other species that are present
Saprophytes
Food Chain
Carbon Cycle 2
Dominant Species
42. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Temperate Deciduous Forest Biome
Grassland Animals
Littoral Zone
Pyramid of Mass
43. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Scavengers
Organism
Littoral Zone
Community
44. Animals that feed on secondary consumer
Hydrosphere
Tertiary Consumers
Photic Zone animals
Biotic Environment
45. Recycle water - oxygen - and phosphorus
Other Cycles
Nitrogen Cycle 3
Food Web
Ecological Succession
46. Symbiotic relationship from which both organisms derive some benefit
Temperate Coniferous Forest Biome
Mutualims
Nitrogen
Taiga Animals
47. Affect the type of vegetation that can be supported
Tundra Biome
Substratum-Minerals
Temperate Coniferous Plants
Substratum-texture
48. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Obligatory
Nitrified
Nitrogen Cycle 3
Temperate Coniferous Plants
49. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Aphotic Zone animals
Climax Community
Decomposer
Communities
50. Adaptations for maintaining their internal osmolarity and conserving water
Herbivores
Photic zone
Littoral Zone
Osmoregulation