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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. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Dentrified
Substratum-texture
Physical Environment- Water
Epiphytes
2. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Organism
Deep-sea Organisms
Cohesive Force
Lithosphere
3. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Taiga Biome
Intertidal Zone
Second Law of Thermodynamics
Autotrophs
4. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Temperate Coniferous Plants
Environmental Factors
Climate and weather
Lithosphere
5. Composed of populations that are able to exist under the new conditions
Competition Same Niche 2
Intraspecific Interactions
Successive Communities
Symbionts
6. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Nitrogen
Photic Zone
Food Chain
Abiotic (Physical) Environment
7. 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
Food Chain
Temperate Coniferous Forest Biome
Photic Zone animals
Substratum-texture
8. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Producers
Competition
Rootlike holdfasts
Competition Same Niche 3
9. Lichens and moss
Tundra Plants
Thundra Animals
Dominant Species
Species
10. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Nitrogen Cycle 2
Desert animals
Physical Environment-Sunlight
Tundra Plants
11. 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
Nitrogen cycle 1
Tropical Rain Forest Animals
Pioneer Organism
Environmental Factors
12. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Environment
Pyramid of Numbers
Osmoregulation
Nitrogen Cycle 4
13. The oceans
Thundra Animals
Hydrosphere
Carbon Cycle 1
Carbon Cycle 3
14. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Competition
Aphotic Zone animals
Temperate Deciduous Forest Plants
Climax Community
15. Conserve water actively
Tundra Plants
Temperate Deciduous Forest Biome
Pioneer Organism
Desert Plants
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
Nitrogen cycle 1
Substratum-texture
Grassland Biome
Mutualims
17. 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
Conditions for stability in an Ecosystem
Parasitism
Dominant Species
18. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Hemeothermic (Warm Blooded)
Nitrogen Cycle 3
Second Law of Thermodynamics
Coimax Vegetatioin
19. Links between oceans and land
Marshes
Nitrogen Cycle 5
Nitrogen Cycle 4
Other Cycles
20. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Competition Same Niche 2
Taiga Biome
Polar Region
Sere
21. When one organism is benefited by the association and the other is not affected
Pyramid of Mass
Abiotic (Physical) Environment
Predators
Commensalism
22. 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
Abiotic (Physical) Environment
Predators
Polar Region
23. Integrated system of species that are dependent upon one another for survival
Taiga Plants
Community
Heterotrophs
Temperate Coniferous Plants
24. Animals that eat both plants and animals
Dentrified
Pyramid of Energy
Competition Same Niche
Omnivores
25. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Intertidal Zone
Deep-sea Organisms
Physical Environment-Sunlight
Hemeothermic (Warm Blooded)
26. The ultimate source of energy for all organisms
Physical Environment-Sunlight
Hemeothermic (Warm Blooded)
Aphotic Zone
Community
27. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Organism
Littoral Zone
Omnivores
Photic zone
28. Used to include only the population and not their physical environment
Biotic Community
Conditions for stability in an Ecosystem
Dominant Species
Nitrogen Cycle 2
29. Nekton and benthos - scavengers - and predators (fiercely competitive)
Aquatic Biomes
Food Web
Aphotic Zone animals
Competition
30. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Biotic Environment
Substratum (soil/rock)
Intertidal Zone Population
Food Pyramids
31. Determine by the amount of decaying plant and animal life in the soil
Predators
Substratum-Humus
Aphotic Zone
Biotic Community
32. Determined by the same decisive factors-temperatures and rainfall
Nature of Biomes
Pelagic Zone
Pyramid of Numbers
Thundra Animals
33. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Marine Biomes
Dentrified
Community
Hypotonic
34. Community in an ecological succession is identified by a dominant species
Poikilothermic (Cold Blooded)
Hypotonic
Sere
Communities
35. Determines the nature of plant and animal life in the soil
Competition Same Niche 3
Littoral Zone Populations
Climate and weather
Substratum (soil/rock)
36. Region typical of the open seas and can be divided into photic and aphotic zones
Population
Pelagic Zone
Nitrogen Cycle 5
Conditions for stability in an Ecosystem
37. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Desert Plants
Food Pyramids
Sere
Ecological Succession
38. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Biosphere
Organism
Aphotic Zone
Coimax Vegetatioin
39. Include saprophytic organisms and organisms of decay
Decomposer
Biosphere
Aphotic Zone animals
Substratum-pH
40. Each member of a food chain uses some of the energy it obtains from its food for its own metabolism and loses some additional energy in the form of heat
Competition
Decomposer
Secondary Consumers
Pyramid of Energy
41. Includes climate - temperature - availability of light and water - and the local topology
Biome
Photic zone
Nitrogen Cycle 5
Abiotic (Physical) Environment
42. Developed long legs and many are hoofed
Grassland Animals
Physical Environment-Temperature
Environment
Carbon Cycle 3
43. Determines water holding capacity
Substratum-texture
Biotic Community
Nitrogen cycle 1
Photic Zone
44. The chief disruptive force
Biotic Community
Desert animals
Temperate Deciduous Forest Animals
Competition
45. 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
Competition Same Niche
Dentrified
Scavengers
Desert Biome
46. Sunlit layer of the open sea extending to a depth of 250-600ft
Aphotic Zone
Photic zone
Nekton
Tropical Rain Forest Animals
47. 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
Tertiary Consumers
Rootlike holdfasts
Lithosphere
Thundra Animals
48. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Tropical Rain Forest Biome
Marine Biomes
Producers
Poikilothermic (Cold Blooded)
49. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Scavengers
Intraspecific Interactions
Mutualims
Poikilothermic (Cold Blooded)
50. 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
Aphotic Zone
Substratum-texture
Carbon Cycle 2
Photic Zone animals