SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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. Symbiotic relationship from which both organisms derive some benefit
Mutualims
Lithosphere
Tertiary Consumers
Competition Same Niche 3
2. Rivers - lakes - ponds - and marshes
Littoral Zone Populations
Carbon Cycle 3
Freshwater Biomes
Nitrogen Cycle 2
3. First to resettle a virgin area
Other Cycles
Pioneer Organism
Lithosphere
Nekton
4. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Physical Environment-Temperature
Nitrified
Dentrified
Taiga Biome
5. One that exerts control over the other species that are present
Dominant Species
Ecosystem
Other Cycles
Aphotic Zone
6. Rhododendrons and pines are more suited for growth in acid oil
Epiphytes
Substratum-pH
Omnivores
Pelagic Zone
7. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Poikilothermic (Cold Blooded)
Littoral Zone Populations
Tropical Rain Forest Biome
Grassland Biome
8. The ultimate source of energy for all organisms
Obligatory
Physical Environment-Sunlight
Heterotrophs
Predators
9. Deer - fox - woodchuck - and squirrel
Competition Same Niche 2
Temperate Deciduous Forest Animals
Nitrogen Cycle 5
Communities
10. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Climate and weather
Photic Zone
Desert Plants
Marshes
11. One species may be competitively superior to the other and drive the second to extinction
Carbon Cycle 2
Photic zone
Competition Same Niche
Ecosystem
12. 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
Omnivores
Carbon Cycle 2
Nitrogen Cycle 4
Intertidal Zone
13. 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
Littoral Zone
Rootlike holdfasts
Substratum-Humus
Lithosphere
14. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Ecological Succession
Second Law of Thermodynamics
Nitrogen Cycle 4
Material Cycles
15. The oceans
Polar Region
Temperate Coniferous Plants
Desert Biome
Hydrosphere
16. Animals that consume primary consumers (carnivores)
Nitrogen cycle 1
Secondary Consumers
Second Law of Thermodynamics
Scavengers
17. Adaptations for maintaining their internal osmolarity and conserving water
Ecosystem
Osmoregulation
Benthos
Dentrified
18. 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
Other Cycles
Predator-Prey relationship
Competition Same Niche 3
Photic Zone animals
19. Integrated system of species that are dependent upon one another for survival
Physical Environment-Temperature
Ecological Succession
Community
Dentrified
20. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Second Law of Thermodynamics
Dominant Species
Grassland Biome
Food Chain
21. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Producers
Food Web
Grassland Biome
Pyramid of Mass
22. Polar bears - musk oxen - and arctic hens
Thundra Animals
Community
Taiga Biome
Tundra Biome
23. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Dominant Species
Tropical Rain Forest Biome
Grassland Biome
Food Pyramids
24. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Scavengers
Nitrogen Cycle 2
Temperate Deciduous Forest Biome
Pyramid of Mass
25. Determined by the same decisive factors-temperatures and rainfall
Pyramid of Numbers
Nature of Biomes
Nitrogen Cycle 3
Decomposer
26. Animals that consume dead animals
Environment
Mutualims
Competition Same Niche
Scavengers
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
Carbon Cycle 3
Saprophytes
Freshwater Biomes
Aphotic Zone
28. Determines the nature of plant and animal life in the soil
Freshwater Biomes
Substratum-texture
Species
Substratum (soil/rock)
29. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Poikilothermic (Cold Blooded)
Producers
Aphotic Zone
Temperate Coniferous Plants
30. 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
Aquatic Biomes
Desert animals
Herbivores
Climate and weather
31. Recycle water - oxygen - and phosphorus
Heterotrophs
Competition
Osmoregulation
Other Cycles
32. Determine by the amount of decaying plant and animal life in the soil
Pelagic Zone
Successive Communities
Substratum-Humus
Climate and weather
33. The major component of the internal environment of all living things
Sere
Physical Environment- Water
Nitrogen Cycle 4
Heterotrophs
34. Composed of populations that are able to exist under the new conditions
Successive Communities
Lithosphere
Nitrogen Cycle 4
Biotic Community
35. Animals that consume only plants or plant foods
Herbivores
Coimax Vegetatioin
Omnivores
Freshwater Biomes
36. Organisms that manufacture their own food
Autotrophs
Polar Region
Nitrogen
Population
37. Affect the type of vegetation that can be supported
Competition
Nitrogen Cycle 4
Substratum-Minerals
Taiga Plants
38. Two fates await the ammonia (NH3). some are nitrified or dentrified
Herbivores
Hypotonic
Nitrogen Cycle 5
Secondary Consumers
39. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Carbon Cycle 2
Photic Zone animals
Pyramid of Numbers
Substratum-pH
40. Food chain is not a simple linear chain but an intricate web
Food Web
Heterotrophs
Species
Taiga Animals
41. 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
Predators
Substratum-pH
Temperate Deciduous Forest Biome
Intraspecific Interactions
42. 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
Grassland Biome
Commensalism
Organism
Conditions for stability in an Ecosystem
43. Only animal life and other heterotrophic life exists
Desert Biome
Aphotic Zone
Pyramid of Mass
Coimax Vegetatioin
44. Include saprophytic organisms and organisms of decay
Marine Biomes
Parasitism
Hypotonic
Decomposer
45. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Tertiary Consumers
Biosphere
Deep-sea Organisms
Aquatic Biomes
46. Animals that eat both plants and animals
Omnivores
Benthos
Hemeothermic (Warm Blooded)
Second Law of Thermodynamics
47. Animals that consume green plants (herbivores)
Osmoregulation
Substratum-texture
Primary Consumers
Grassland Biome
48. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Substratum-Humus
Intertidal Zone
Dentrified
Aphotic Zone animals
49. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Carbon Cycle 1
Environmental Factors
Intertidal Zone Population
50. Lichens and moss
Hemeothermic (Warm Blooded)
Tundra Plants
Photic Zone animals
Other Cycles