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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. Any group of similar organisms that are capable of reproducing
Material Cycles
Polar Region
Species
Carnivores
2. Rhododendrons and pines are more suited for growth in acid oil
Predator-Prey relationship
Taiga Plants
Substratum-pH
Temperate Deciduous Forest Animals
3. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Food Chain
Tropical Rain Forest Biome
Polar Region
Aphotic Zone animals
4. Two fates await the ammonia (NH3). some are nitrified or dentrified
Nitrogen Cycle 5
Heterotrophs
Secondary Consumers
Polar Region
5. Food chain is not a simple linear chain but an intricate web
Food Web
Nitrogen Cycle 5
Population
Desert Biome
6. 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 Animals
Nitrogen cycle 1
Dentrified
Pelagic Zone
7. One that exerts control over the other species that are present
Substratum-pH
Aphotic Zone animals
Temperate Deciduous Forest Animals
Dominant Species
8. 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
Rootlike holdfasts
Community
Littoral Zone
Intraspecific Interactions
9. Distinct community in a geographic region
Aphotic Zone
Littoral Zone
Desert animals
Biome
10. 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
Tropical Rain Forest Biome
Nitrified
Competition Same Niche 3
Heterotrophs
11. Determines water holding capacity
Material Cycles
Benthos
Species
Substratum-texture
12. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Littoral Zone
Competition Same Niche 3
Abiotic (Physical) Environment
Competition Same Niche 2
13. Deer - fox - woodchuck - and squirrel
Temperate Deciduous Forest Animals
Poikilothermic (Cold Blooded)
Predator-Prey relationship
Grassland Biome
14. Forest floors contain moss and lichens
Predators
Poikilothermic (Cold Blooded)
Thundra Animals
Taiga Plants
15. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Littoral Zone
Predator-Prey relationship
Biosphere
Nitrogen Cycle 4
16. Needs constant energy source and cycling of materials between the living system
Competition Same Niche
Nitrogen
Conditions for stability in an Ecosystem
Nitrified
17. Adaptations for maintaining their internal osmolarity and conserving water
Polar Region
Biotic Community
Osmoregulation
Nitrogen
18. Include saprophytic organisms and organisms of decay
Decomposer
Species
Ecological Succession
Temperate Deciduous Forest Plants
19. Recycle water - oxygen - and phosphorus
Nitrified
Other Cycles
Thundra Animals
Biotic Environment
20. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Autotrophs
Pelagic Zone
Temperate Deciduous Forest Biome
Polar Region
21. The chief disruptive force
Nitrogen
Substratum-Humus
Competition
Photic Zone animals
22. Includes climate - temperature - availability of light and water - and the local topology
Nitrogen Cycle 3
Pelagic Zone
Abiotic (Physical) Environment
Tundra Biome
23. Consists of populations of different plants and animal species interacting with each other in a given environment
Tropical Rain Forest Biome
Epiphytes
Communities
Tropical Rain Forest Plants
24. Animals that consume green plants (herbivores)
Organism
Tundra Plants
Obligatory
Primary Consumers
25. When one organism is benefited by the association and the other is not affected
Conditions for stability in an Ecosystem
Hypotonic
Taiga Animals
Commensalism
26. Receive less than ten inches of rain each year; the rain is concentrated within a few heavy cloudbursts -ex: Sahara in Africa and Gobi in Asia
Pelagic Zone
Polar Region
Tundra Biome
Desert Biome
27. The metabolically produced CO2 is released to the air. The rest of the orgnaic carbon remains locked whthin an organism until its death (except for wastes given off) - at which time decay processes by bacteria return the CO2 to the air
Grassland Animals
Rootlike holdfasts
Carbon Cycle 3
Autotrophs
28. 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
Biotic Environment
Littoral Zone
Tundra Plants
Hypotonic
29. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Pelagic Zone
Littoral Zone
Climax Community
Aphotic Zone
30. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Aphotic Zone animals
Competition Same Niche 3
Tertiary Consumers
Symbionts
31. Animals that feed on secondary consumer
Communities
Lithosphere
Pelagic Zone
Tertiary Consumers
32. 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
Competition
Photic Zone animals
Food Chain
33. Polar bears - musk oxen - and arctic hens
Nitrogen Cycle 5
Producers
Substratum-pH
Thundra Animals
34. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Tropical Rain Forest Animals
Thundra Animals
Environmental Factors
Aquatic Biomes
35. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Marine Biomes
Aphotic Zone
Nekton
Substratum-pH
36. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Pelagic Zone
Nature of Biomes
Nitrogen
Hemeothermic (Warm Blooded)
37. Community in an ecological succession is identified by a dominant species
Sere
Freshwater Biomes
Nitrogen Cycle 4
Predator-Prey relationship
38. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Tertiary Consumers
Successive Communities
Biotic Community
Pyramid of Numbers
39. One species may be competitively superior to the other and drive the second to extinction
Population
Competition Same Niche
Biosphere
Deep-sea Organisms
40. 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
Carbon Cycle 1
Other Cycles
Rootlike holdfasts
Tundra Biome
41. Nekton and benthos - scavengers - and predators (fiercely competitive)
Dentrified
Pelagic Zone
Hemeothermic (Warm Blooded)
Aphotic Zone animals
42. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Photic zone
Material Cycles
Intraspecific Interactions
Environment
43. Determined by the same decisive factors-temperatures and rainfall
Nitrogen Cycle 2
Substratum (soil/rock)
Polar Region
Nature of Biomes
44. Composed of populations that are able to exist under the new conditions
Sere
Primary Consumers
Intertidal Zone
Successive Communities
45. 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
Dominant Species
Second Law of Thermodynamics
Predators
Carbon Cycle 1
46. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Competition Same Niche 2
Deep-sea Organisms
Climax Community
Parasitism
47. Animals that consume primary consumers (carnivores)
Biotic Environment
Omnivores
Biotic Community
Secondary Consumers
48. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Photic Zone animals
Coimax Vegetatioin
Substratum-Humus
Organism
49. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Dominant Species
Epiphytes
Littoral Zone Populations
Population
50. Sunlit layer of the open sea extending to a depth of 250-600ft
Food Pyramids
Photic zone
Competition
Grassland Animals