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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. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Temperate Coniferous Forest Biome
Biotic Environment
Cohesive Force
Tropical Rain Forest Animals
2. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Taiga Plants
Parasitism
Physical Environment-Temperature
Grassland Biome
3. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Substratum-Humus
Sere
Tertiary Consumers
Ecological Succession
4. 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
Tundra Plants
Desert Biome
Communities
Food Chain
5. Determines water holding capacity
Competition Same Niche 2
Nitrogen cycle 1
Substratum-texture
Biotic Community
6. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Hydrosphere
Intertidal Zone
Tundra Plants
Deep-sea Organisms
7. Organisms that manufacture their own food
Pyramid of Numbers
Littoral Zone Populations
Autotrophs
Deep-sea Organisms
8. Animals that consume primary consumers (carnivores)
Abiotic (Physical) Environment
Competition Same Niche 2
Secondary Consumers
Tropical Rain Forest Biome
9. The major component of the internal environment of all living things
Physical Environment- Water
Taiga Animals
Niche
Scavengers
10. Include saprophytic organisms and organisms of decay
Benthos
Decomposer
Tropical Rain Forest Animals
Population
11. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Food Web
Nitrogen Cycle 2
Substratum-texture
12. Sunlit layer of the open sea extending to a depth of 250-600ft
Photic zone
Mutualims
Dentrified
Conditions for stability in an Ecosystem
13. Region typical of the open seas and can be divided into photic and aphotic zones
Pelagic Zone
Nitrogen Cycle 2
Nitrogen cycle 1
Aquatic Biomes
14. Two fates await the ammonia (NH3). some are nitrified or dentrified
Nitrogen Cycle 5
Population
Primary Consumers
Hydrosphere
15. Without a constant input of energy from the sun - an ecosystem would soon run down - as food is transferred from one level of the food chain to the next - a transfer of energy occurs
Aphotic Zone
Physical Environment-Sunlight
Carbon Cycle 3
Food Pyramids
16. Crawling and sessile organsms
Benthos
Climate and weather
Pyramid of Numbers
Ecology
17. 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
Climax Community
Species
Abiotic (Physical) Environment
Nitrogen cycle 1
18. Links between oceans and land
Carnivores
Marshes
Food Web
Tundra Plants
19. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Niche
Heterotrophs
Commensalism
Taiga Plants
20. The oceans
Abiotic (Physical) Environment
Temperate Deciduous Forest Animals
Aphotic Zone animals
Hydrosphere
21. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Producers
Population
Tropical Rain Forest Animals
22. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Sere
Saprophytes
Poikilothermic (Cold Blooded)
Biotic Environment
23. 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
Temperate Coniferous Forest Biome
Sere
Niche
Scavengers
24. First to resettle a virgin area
Aphotic Zone animals
Climate and weather
Polar Region
Pioneer Organism
25. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Photic Zone animals
Substratum-pH
Desert Plants
Successive Communities
26. Lichens and moss
Nitrogen cycle 1
Nature of Biomes
Tundra Plants
Other Cycles
27. Integrated system of species that are dependent upon one another for survival
Community
Pioneer Organism
Photic zone
Marshes
28. Group of organisms of the same species living together in a given location
Population
Thundra Animals
Food Pyramids
Abiotic (Physical) Environment
29. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Taiga Animals
Temperate Deciduous Forest Plants
Cohesive Force
Benthos
30. Rock and soil surface
Lithosphere
Substratum-texture
Grassland Biome
Parasitism
31. Determine by the amount of decaying plant and animal life in the soil
Substratum-Humus
Aquatic Biomes
Predators
Taiga Plants
32. 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
Second Law of Thermodynamics
Carbon Cycle 2
Coimax Vegetatioin
Grassland Biome
33. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Osmoregulation
Hydrosphere
Temperate Coniferous Plants
Nitrified
34. Gaseous CO2 enters the living world when plants use it to produce glucose via photosynthesis. The carbon atoms in CO2 are bonded to hydrogen and other carbon atoms. the plant uses the glucose to make starch - proteins - and fat
Carbon Cycle 2
Aphotic Zone
Benthos
Carbon Cycle 1
35. 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
Desert Plants
Nitrogen cycle 1
Marine Biomes
36. Animals that feed on secondary consumer
Biotic Community
Tertiary Consumers
Hypotonic
Pyramid of Numbers
37. 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
Biotic Environment
Coimax Vegetatioin
Nekton
Intraspecific Interactions
38. Regiong beneatht he photic zone that receives no light
Physical Environment- Water
Competition
Taiga Biome
Aphotic Zone
39. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Nitrogen
Aquatic Biomes
Temperate Coniferous Plants
Environment
40. Only animal life and other heterotrophic life exists
Nitrogen Cycle 4
Aphotic Zone
Scavengers
Taiga Biome
41. Animals that consume dead animals
Scavengers
Substratum (soil/rock)
Successive Communities
Physical Environment-Temperature
42. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Tropical Rain Forest Plants
Substratum-Minerals
Pyramid of Numbers
Predators
43. One species may be competitively superior to the other and drive the second to extinction
Grassland Animals
Competition Same Niche
Tropical Rain Forest Biome
Physical Environment- Water
44. Rivers - lakes - ponds - and marshes
Thundra Animals
Autotrophs
Communities
Freshwater Biomes
45. Vegetation such as vines and eppiphytes
Littoral Zone Populations
Nitrogen Cycle 2
Cohesive Force
Tropical Rain Forest Plants
46. Polar bears - musk oxen - and arctic hens
Carbon Cycle 1
Osmoregulation
Thundra Animals
Food Chain
47. Determines the nature of plant and animal life in the soil
Temperate Coniferous Plants
Competition Same Niche 2
Substratum (soil/rock)
Environmental Factors
48. Deer - fox - woodchuck - and squirrel
Temperate Deciduous Forest Animals
Parasitism
Temperate Coniferous Plants
Aquatic Biomes
49. Free-living organisms that feed on other living organisms
Carbon Cycle 2
Predators
Predator-Prey relationship
Photic Zone
50. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Competition Same Niche
Biosphere
Nitrogen Cycle 3
Sere