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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. When a parasite benefits at the expense of the host
Parasitism
Predators
Coimax Vegetatioin
Competition Same Niche 2
2. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Desert Biome
Biosphere
Predator-Prey relationship
Nitrogen Cycle 5
3. One that exerts control over the other species that are present
Population
Other Cycles
Environment
Dominant Species
4. Crawling and sessile organsms
Population
Nitrogen Cycle 4
Predator-Prey relationship
Benthos
5. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Aphotic Zone
Organism
Temperate Deciduous Forest Biome
Ecosystem
6. Food chain is not a simple linear chain but an intricate web
Population
Thundra Animals
Heterotrophs
Food Web
7. Region typical of the open seas and can be divided into photic and aphotic zones
Intertidal Zone
Rootlike holdfasts
Thundra Animals
Pelagic Zone
8. Recycle water - oxygen - and phosphorus
Other Cycles
Rootlike holdfasts
Substratum-Minerals
Pyramid of Energy
9. Animals that eat both plants and animals
Omnivores
Deep-sea Organisms
Aphotic Zone animals
Aphotic Zone
10. Group of organisms of the same species living together in a given location
Population
Climax Community
Temperate Deciduous Forest Plants
Competition
11. The major component of the internal environment of all living things
Biotic Environment
Heterotrophs
Physical Environment- Water
Biotic Community
12. 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
Herbivores
Nitrogen cycle 1
Substratum-Minerals
Hemeothermic (Warm Blooded)
13. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Biotic Community
Tundra Plants
Nitrified
Mutualims
14. Include saprophytic organisms and organisms of decay
Parasitism
Food Chain
Taiga Plants
Decomposer
15. Defines the functional role of an organism in its ecosystem -described what the organism eats - where and how it obtains its food - what climatic factors it can tolerate and which are optimal - the nature of its parasites and predators - where and ho
Ecosystem
Temperate Deciduous Forest Plants
Lithosphere
Niche
16. Vegetation such as vines and eppiphytes
Tropical Rain Forest Plants
Community
Nitrified
Grassland Animals
17. 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
Nitrogen
Lithosphere
Temperate Coniferous Forest Biome
Biotic Community
18. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Carnivores
Nitrogen
Littoral Zone
Commensalism
19. One species may be competitively superior to the other and drive the second to extinction
Thundra Animals
Taiga Plants
Competition Same Niche
Epiphytes
20. Links between oceans and land
Marshes
Saprophytes
Desert Biome
Tropical Rain Forest Plants
21. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Food Chain
Carbon Cycle 1
Deep-sea Organisms
Biotic Environment
22. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Marine Biomes
Environment
Pyramid of Energy
Nitrogen
23. Includes the community and the environment and usually all five kingdoms
Ecosystem
Predator-Prey relationship
Nitrogen Cycle 2
Second Law of Thermodynamics
24. Animals that consume dead animals
Climax Community
Scavengers
Temperate Deciduous Forest Animals
Heterotrophs
25. Animals that only eat other animals -possess pointed teeth and fang-like canine teeth for tearing flesh -have shorter digestive tracts because the easier digestibility of animal food
Ecosystem
Substratum-pH
Carnivores
Carbon Cycle 2
26. Lichens and moss
Nitrified
Aquatic Biomes
Tundra Plants
Temperate Deciduous Forest Biome
27. Deer - fox - woodchuck - and squirrel
Nitrogen Cycle 3
Biotic Community
Physical Environment- Water
Temperate Deciduous Forest Animals
28. 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
Commensalism
Successive Communities
Substratum-pH
Rootlike holdfasts
29. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Producers
Taiga Biome
Ecological Succession
Lithosphere
30. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Carbon Cycle 1
Nitrogen cycle 1
Desert Biome
Pyramid of Numbers
31. Animals that consume green plants (herbivores)
Primary Consumers
Poikilothermic (Cold Blooded)
Secondary Consumers
Pyramid of Energy
32. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Saprophytes
Temperate Coniferous Forest Biome
Physical Environment-Temperature
Aphotic Zone
33. Free-living organisms that feed on other living organisms
Saprophytes
Thundra Animals
Predators
Nitrogen Cycle 5
34. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Hydrosphere
Biosphere
Aphotic Zone animals
Marshes
35. When one organism is benefited by the association and the other is not affected
Intraspecific Interactions
Grassland Animals
Parasitism
Commensalism
36. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Competition Same Niche
Hemeothermic (Warm Blooded)
Sere
Heterotrophs
37. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Pyramid of Energy
Decomposer
Tropical Rain Forest Biome
Dominant Species
38. Determined by the same decisive factors-temperatures and rainfall
Pyramid of Energy
Food Web
Nature of Biomes
Freshwater Biomes
39. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Desert Biome
Physical Environment-Sunlight
Environment
Organism
40. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Poikilothermic (Cold Blooded)
Coimax Vegetatioin
Nitrogen Cycle 3
Predator-Prey relationship
41. Receive less rainfall than the temperate forests - have long - cold winters - and are inhabited by single coniferous tree-the spruce -extreme northern parts of Canada and Russia
Taiga Biome
Environmental Factors
Nitrogen
Photic Zone
42. The study of interactions between organisms and their environment
Ecology
Littoral Zone Populations
Niche
Substratum-Minerals
43. 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
Substratum-pH
Tundra Plants
Tundra Biome
Desert Plants
44. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Carbon Cycle 1
Littoral Zone Populations
Nitrogen Cycle 2
Sere
45. Adaptations for maintaining their internal osmolarity and conserving water
Marshes
Rootlike holdfasts
Taiga Animals
Osmoregulation
46. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Grassland Biome
Osmoregulation
Poikilothermic (Cold Blooded)
Nekton
47. 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 2
Desert animals
Tertiary Consumers
Hypotonic
48. Determines the nature of plant and animal life in the soil
Substratum-pH
Decomposer
Physical Environment-Sunlight
Substratum (soil/rock)
49. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Sere
Biome
Deep-sea Organisms
Temperate Coniferous Plants
50. 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
Temperate Deciduous Forest Biome
Heterotrophs
Competition Same Niche 2
Secondary Consumers