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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 vegetation that becomes dominant and stable after years of evolutiionary development
Coimax Vegetatioin
Nitrogen Cycle 2
Parasitism
Grassland Animals
2. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Temperate Coniferous Plants
Communities
Food Web
Desert animals
3. Region typical of the open seas and can be divided into photic and aphotic zones
Parasitism
Successive Communities
Species
Pelagic Zone
4. Includes the community and the environment and usually all five kingdoms
Pyramid of Numbers
Ecosystem
Environmental Factors
Predators
5. Any group of similar organisms that are capable of reproducing
Nekton
Species
Decomposer
Nitrogen Cycle 3
6. Includes climate - temperature - availability of light and water - and the local topology
Competition
Successive Communities
Grassland Animals
Abiotic (Physical) Environment
7. 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
Competition
Predator-Prey relationship
Population
Temperate Coniferous Forest Biome
8. Needs constant energy source and cycling of materials between the living system
Niche
Conditions for stability in an Ecosystem
Grassland Biome
Decomposer
9. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Temperate Deciduous Forest Plants
Omnivores
Cohesive Force
Pyramid of Numbers
10. 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
Producers
Pyramid of Mass
Littoral Zone Populations
Taiga Plants
11. The oceans
Autotrophs
Hydrosphere
Physical Environment-Sunlight
Communities
12. Crawling and sessile organsms
Competition Same Niche 3
Grassland Biome
Benthos
Secondary Consumers
13. 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
Food Pyramids
Nitrogen Cycle 4
Competition Same Niche 3
Desert Biome
14. Rivers - lakes - ponds - and marshes
Freshwater Biomes
Dominant Species
Secondary Consumers
Carbon Cycle 2
15. Deer - fox - woodchuck - and squirrel
Communities
Marine Biomes
Temperate Deciduous Forest Animals
Desert Biome
16. When a parasite benefits at the expense of the host
Parasitism
Biotic Environment
Temperate Coniferous Forest Biome
Tropical Rain Forest Animals
17. Animals that consume only plants or plant foods
Carbon Cycle 1
Competition Same Niche 3
Autotrophs
Herbivores
18. Used to include only the population and not their physical environment
Scavengers
Biotic Community
Thundra Animals
Climate and weather
19. Encompasses all that is external to the organism and is necessary for its existence
Ecology
Tertiary Consumers
Environment
Substratum-Humus
20. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Biosphere
Saprophytes
Producers
Epiphytes
21. 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
Taiga Animals
Taiga Biome
Climate and weather
Grassland Biome
22. Animals that eat both plants and animals
Autotrophs
Physical Environment-Sunlight
Omnivores
Ecosystem
23. 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
Second Law of Thermodynamics
Obligatory
Desert Plants
Food Pyramids
24. 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
Tropical Rain Forest Plants
Intraspecific Interactions
Ecosystem
Nitrogen Cycle 4
25. The major component of the internal environment of all living things
Photic Zone animals
Physical Environment- Water
Substratum-Humus
Environment
26. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Pyramid of Numbers
Producers
Ecological Succession
Predator-Prey relationship
27. Animals that consume green plants (herbivores)
Physical Environment- Water
Climate and weather
Primary Consumers
Sere
28. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Temperate Deciduous Forest Biome
Carbon Cycle 1
Tertiary Consumers
Omnivores
29. The ultimate source of energy for all organisms
Pelagic Zone
Heterotrophs
Physical Environment-Sunlight
Tertiary Consumers
30. 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
Substratum-Humus
Nitrogen cycle 1
Intertidal Zone Population
Substratum-pH
31. 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
Tundra Biome
Nekton
Competition Same Niche 3
Rootlike holdfasts
32. Conserve water actively
Desert Plants
Aquatic Biomes
Second Law of Thermodynamics
Nitrogen Cycle 4
33. 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
Substratum-pH
Aquatic Biomes
Grassland Biome
Pelagic Zone
34. Two fates await the ammonia (NH3). some are nitrified or dentrified
Nitrogen Cycle 5
Nekton
Climax Community
Niche
35. 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
Nitrogen Cycle 4
Saprophytes
Decomposer
Hypotonic
36. Vegetation such as vines and eppiphytes
Tropical Rain Forest Plants
Physical Environment-Sunlight
Biome
Producers
37. Recycle water - oxygen - and phosphorus
Second Law of Thermodynamics
Nitrified
Species
Other Cycles
38. Rhododendrons and pines are more suited for growth in acid oil
Coimax Vegetatioin
Temperate Coniferous Plants
Thundra Animals
Substratum-pH
39. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Nekton
Polar Region
Substratum (soil/rock)
Carnivores
40. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Material Cycles
Tropical Rain Forest Plants
Mutualims
Tundra Biome
41. 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
Food Pyramids
Competition Same Niche 2
Cohesive Force
Substratum-Minerals
42. Links between oceans and land
Coimax Vegetatioin
Marshes
Tropical Rain Forest Biome
Tundra Biome
43. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Biome
Other Cycles
Physical Environment-Temperature
Desert animals
44. Food chain is not a simple linear chain but an intricate web
Secondary Consumers
Mutualims
Environmental Factors
Food Web
45. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Nekton
Decomposer
Benthos
Carbon Cycle 3
46. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Pyramid of Numbers
Pioneer Organism
Rootlike holdfasts
Heterotrophs
47. Animals that feed on secondary consumer
Tertiary Consumers
Community
Aphotic Zone
Taiga Plants
48. Only animal life and other heterotrophic life exists
Aphotic Zone
Sere
Biosphere
Osmoregulation
49. Animals that consume primary consumers (carnivores)
Secondary Consumers
Heterotrophs
Biosphere
Carbon Cycle 2
50. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Nitrogen Cycle 3
Temperate Coniferous Forest Biome
Freshwater Biomes
Photic zone