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. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Pyramid of Mass
Tropical Rain Forest Biome
Hydrosphere
Desert Biome
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
Substratum-Humus
Pelagic Zone
Intraspecific Interactions
Physical Environment-Sunlight
3. Include saprophytic organisms and organisms of decay
Decomposer
Benthos
Parasitism
Ecosystem
4. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Rootlike holdfasts
Temperate Deciduous Forest Plants
Nitrogen Cycle 2
Aphotic Zone
5. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Deep-sea Organisms
Carbon Cycle 1
Scavengers
Heterotrophs
6. When one organism is benefited by the association and the other is not affected
Competition
Commensalism
Nitrogen cycle 1
Niche
7. The vegetation that becomes dominant and stable after years of evolutiionary development
Freshwater Biomes
Carbon Cycle 3
Carnivores
Coimax Vegetatioin
8. 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
Sere
Carbon Cycle 2
Aquatic Biomes
Aphotic Zone
9. Organisms that manufacture their own food
Biotic Environment
Autotrophs
Rootlike holdfasts
Temperate Coniferous Plants
10. One that exerts control over the other species that are present
Photic Zone animals
Scavengers
Grassland Biome
Dominant Species
11. Determine by the amount of decaying plant and animal life in the soil
Substratum-Humus
Species
Biome
Predator-Prey relationship
12. Deer - fox - woodchuck - and squirrel
Marine Biomes
Carnivores
Obligatory
Temperate Deciduous Forest Animals
13. The ultimate source of energy for all organisms
Autotrophs
Thundra Animals
Physical Environment-Sunlight
Intraspecific Interactions
14. Sunlit layer of the open sea extending to a depth of 250-600ft
Climate and weather
Pyramid of Numbers
Temperate Coniferous Plants
Photic zone
15. Rock and soil surface
Intraspecific Interactions
Desert Plants
Lithosphere
Omnivores
16. The study of interactions between organisms and their environment
Organism
Ecology
Pyramid of Numbers
Epiphytes
17. Group of organisms of the same species living together in a given location
Population
Pioneer Organism
Producers
Thundra Animals
18. Animals that feed on secondary consumer
Tertiary Consumers
Competition
Aquatic Biomes
Tropical Rain Forest Animals
19. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Commensalism
Temperate Deciduous Forest Biome
Marine Biomes
Herbivores
20. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Photic Zone
Niche
Environment
Community
21. One or both organisms can't survive without the other
Substratum (soil/rock)
Obligatory
Biotic Community
Aphotic Zone
22. Needs constant energy source and cycling of materials between the living system
Photic zone
Herbivores
Conditions for stability in an Ecosystem
Food Chain
23. 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
Grassland Biome
Other Cycles
Physical Environment- Water
Nitrogen cycle 1
24. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Heterotrophs
Climax Community
Tertiary Consumers
Desert animals
25. Two fates await the ammonia (NH3). some are nitrified or dentrified
Nature of Biomes
Competition Same Niche 3
Nitrogen Cycle 5
Symbionts
26. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Biotic Community
Marine Biomes
Carnivores
Ecological Succession
27. Determines water holding capacity
Nitrogen
Substratum-texture
Omnivores
Nekton
28. 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
Material Cycles
Pyramid of Energy
Aphotic Zone
Aquatic Biomes
29. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Substratum-pH
Tropical Rain Forest Animals
Hypotonic
Pelagic Zone
30. Composed of populations that are able to exist under the new conditions
Successive Communities
Aphotic Zone
Pelagic Zone
Parasitism
31. Consists of populations of different plants and animal species interacting with each other in a given environment
Tropical Rain Forest Biome
Communities
Biosphere
Osmoregulation
32. Used to include only the population and not their physical environment
Biotic Community
Predator-Prey relationship
Coimax Vegetatioin
Intertidal Zone
33. 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
Poikilothermic (Cold Blooded)
Hypotonic
Carbon Cycle 3
Autotrophs
34. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Competition Same Niche 2
Heterotrophs
Intertidal Zone Population
Pyramid of Energy
35. Encompasses all that is external to the organism and is necessary for its existence
Hydrosphere
Environment
Biotic Environment
Nitrified
36. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Competition
Temperate Coniferous Plants
Carbon Cycle 3
Grassland Animals
37. Free-living organisms that feed on other living organisms
Predator-Prey relationship
Biotic Community
Predators
Decomposer
38. The major component of the internal environment of all living things
Tropical Rain Forest Biome
Physical Environment- Water
Food Chain
Niche
39. 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
Pelagic Zone
Second Law of Thermodynamics
Desert Biome
Dominant Species
40. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Producers
Predator-Prey relationship
Grassland Biome
41. 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
Temperate Deciduous Forest Biome
Taiga Biome
Tundra Plants
42. Lichens and moss
Nitrogen Cycle 3
Aquatic Biomes
Physical Environment- Water
Tundra Plants
43. Integrated system of species that are dependent upon one another for survival
Communities
Ecological Succession
Community
Nature of Biomes
44. The chief disruptive force
Desert animals
Physical Environment-Sunlight
Tertiary Consumers
Competition
45. Determines the nature of plant and animal life in the soil
Population
Substratum (soil/rock)
Competition Same Niche 2
Intertidal Zone
46. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Taiga Animals
Tertiary Consumers
Environment
Competition
47. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Abiotic (Physical) Environment
Physical Environment-Temperature
Organism
Photic zone
48. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Decomposer
Grassland Biome
Producers
Nitrogen Cycle 2
49. Vegetation such as vines and eppiphytes
Lithosphere
Tropical Rain Forest Plants
Benthos
Dentrified
50. Adaptations for maintaining their internal osmolarity and conserving water
Carnivores
Osmoregulation
Pyramid of Mass
Commensalism