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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. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Food Web
Herbivores
Marine Biomes
Intraspecific Interactions
2. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Hemeothermic (Warm Blooded)
Biosphere
Temperate Deciduous Forest Biome
Ecosystem
3. When a parasite benefits at the expense of the host
Parasitism
Aphotic Zone
Competition Same Niche 3
Nekton
4. Integrated system of species that are dependent upon one another for survival
Desert Biome
Photic zone
Tertiary Consumers
Community
5. Encompasses all that is external to the organism and is necessary for its existence
Littoral Zone
Dominant Species
Environment
Photic Zone
6. Determines water holding capacity
Dominant Species
Physical Environment-Temperature
Autotrophs
Substratum-texture
7. Polar bears - musk oxen - and arctic hens
Aphotic Zone
Food Pyramids
Substratum-pH
Thundra Animals
8. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Symbionts
Biome
Hemeothermic (Warm Blooded)
9. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Nitrified
Tropical Rain Forest Biome
Herbivores
Dentrified
10. Used to include only the population and not their physical environment
Conditions for stability in an Ecosystem
Nitrogen Cycle 2
Biotic Community
Intertidal Zone
11. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Food Chain
Hydrosphere
Food Web
Other Cycles
12. 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
Substratum-Minerals
Species
Sere
Aquatic Biomes
13. Developed long legs and many are hoofed
Grassland Animals
Mutualims
Food Web
Rootlike holdfasts
14. Links between oceans and land
Temperate Coniferous Forest Biome
Taiga Biome
Heterotrophs
Marshes
15. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Other Cycles
Temperate Deciduous Forest Animals
Taiga Animals
Competition Same Niche 2
16. 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
Physical Environment-Temperature
Niche
Biotic Environment
Grassland Biome
17. Vegetation such as vines and eppiphytes
Cohesive Force
Photic zone
Tropical Rain Forest Plants
Symbionts
18. Organisms that manufacture their own food
Autotrophs
Thundra Animals
Substratum (soil/rock)
Temperate Deciduous Forest Animals
19. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Predator-Prey relationship
Ecological Succession
Photic Zone animals
Grassland Animals
20. Conserve water actively
Photic Zone
Desert Plants
Successive Communities
Aphotic Zone
21. The ultimate source of energy for all organisms
Physical Environment-Sunlight
Nitrified
Pyramid of Mass
Tundra Biome
22. Rock and soil surface
Polar Region
Population
Nitrified
Lithosphere
23. Free-living organisms that feed on other living organisms
Physical Environment-Temperature
Predators
Community
Mutualims
24. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Niche
Hydrosphere
Littoral Zone Populations
Nitrogen
25. Lichens and moss
Carbon Cycle 3
Tundra Plants
Tropical Rain Forest Biome
Obligatory
26. Includes the community and the environment and usually all five kingdoms
Tropical Rain Forest Plants
Ecosystem
Photic Zone animals
Population
27. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Communities
Grassland Animals
Pioneer Organism
28. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Herbivores
Heterotrophs
Producers
Predator-Prey relationship
29. Animals that consume green plants (herbivores)
Primary Consumers
Desert Plants
Tropical Rain Forest Biome
Dominant Species
30. Animals that consume primary consumers (carnivores)
Competition Same Niche 2
Ecosystem
Secondary Consumers
Food Web
31. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Hypotonic
Tropical Rain Forest Animals
Photic Zone animals
Ecosystem
32. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Niche
Temperate Deciduous Forest Plants
Climax Community
Carnivores
33. 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
Hydrosphere
Photic zone
Nitrogen cycle 1
Intertidal Zone
34. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Aphotic Zone animals
Polar Region
Temperate Deciduous Forest Biome
Physical Environment- Water
35. 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
Nitrified
Species
Taiga Biome
Hydrosphere
36. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Physical Environment-Temperature
Desert Plants
Niche
Carbon Cycle 2
37. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Deep-sea Organisms
Producers
Conditions for stability in an Ecosystem
Taiga Animals
38. 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
Scavengers
Nitrogen cycle 1
Desert Biome
39. The nitrogen locked up in the wastes and dead tissues is released by the action of the bacteria of decay - which convert the proteins into ammonia
Nitrogen Cycle 4
Nekton
Communities
Ecology
40. Food chain is not a simple linear chain but an intricate web
Primary Consumers
Obligatory
Cohesive Force
Food Web
41. Sunlit layer of the open sea extending to a depth of 250-600ft
Substratum (soil/rock)
Photic zone
Tertiary Consumers
Aquatic Biomes
42. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Ecology
Epiphytes
Material Cycles
Rootlike holdfasts
43. Determines the nature of plant and animal life in the soil
Climax Community
Niche
Substratum (soil/rock)
Successive Communities
44. 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
Population
Heterotrophs
Temperate Coniferous Forest Biome
Photic zone
45. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Population
Poikilothermic (Cold Blooded)
Pyramid of Numbers
Temperate Coniferous Plants
46. Includes climate - temperature - availability of light and water - and the local topology
Dominant Species
Physical Environment- Water
Parasitism
Abiotic (Physical) Environment
47. Include reproduction and protection from predators and destructive weather
Predators
Nitrogen
Cohesive Force
Desert Plants
48. Forest floors contain moss and lichens
Hydrosphere
Taiga Plants
Temperate Deciduous Forest Biome
Nitrified
49. Affect the type of vegetation that can be supported
Biotic Environment
Photic zone
Substratum-Minerals
Competition Same Niche 3
50. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Commensalism
Competition Same Niche
Hypotonic
Nitrified