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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. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Temperate Deciduous Forest Animals
Community
Physical Environment-Temperature
Climate and weather
2. Conserve water actively
Physical Environment-Temperature
Competition Same Niche 2
Desert Plants
Competition
3. 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
Food Chain
Conditions for stability in an Ecosystem
Competition Same Niche 2
Material Cycles
4. Animals that eat both plants and animals
Physical Environment- Water
Intraspecific Interactions
Nitrified
Omnivores
5. Nekton and benthos - scavengers - and predators (fiercely competitive)
Nitrogen cycle 1
Aphotic Zone animals
Symbionts
Tropical Rain Forest Plants
6. Food chain is not a simple linear chain but an intricate web
Biotic Environment
Pioneer Organism
Food Web
Hemeothermic (Warm Blooded)
7. Encompasses all that is external to the organism and is necessary for its existence
Environment
Biotic Community
Photic Zone
Osmoregulation
8. Algae - crabs - crustacea - and many different species of fish
Tundra Biome
Littoral Zone Populations
Second Law of Thermodynamics
Thundra Animals
9. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Nitrogen Cycle 2
Benthos
Temperate Deciduous Forest Plants
Epiphytes
10. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Predators
Nitrogen Cycle 3
Lithosphere
Aphotic Zone
11. Two fates await the ammonia (NH3). some are nitrified or dentrified
Species
Photic zone
Competition Same Niche 3
Nitrogen Cycle 5
12. The study of interactions between organisms and their environment
Competition Same Niche 2
Physical Environment- Water
Ecology
Obligatory
13. Links between oceans and land
Freshwater Biomes
Carbon Cycle 2
Marshes
Pyramid of Energy
14. 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
Tundra Biome
Physical Environment-Sunlight
Thundra Animals
15. Region typical of the open seas and can be divided into photic and aphotic zones
Intertidal Zone
Omnivores
Benthos
Pelagic Zone
16. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Scavengers
Hemeothermic (Warm Blooded)
Community
Material Cycles
17. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Biosphere
Producers
Successive Communities
Polar Region
18. Deer - fox - woodchuck - and squirrel
Herbivores
Physical Environment- Water
Predator-Prey relationship
Temperate Deciduous Forest Animals
19. 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
Pelagic Zone
Competition Same Niche 3
Other Cycles
20. 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
Substratum-Minerals
Grassland Biome
Heterotrophs
Taiga Biome
21. Rock and soil surface
Competition Same Niche 2
Lithosphere
Nitrified
Temperate Coniferous Forest Biome
22. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Pelagic Zone
Aquatic Biomes
Marine Biomes
Pyramid of Mass
23. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Hemeothermic (Warm Blooded)
Abiotic (Physical) Environment
Sere
Desert Plants
24. Only animal life and other heterotrophic life exists
Organism
Aphotic Zone
Rootlike holdfasts
Taiga Biome
25. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Aphotic Zone
Deep-sea Organisms
Littoral Zone
Scavengers
26. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Dentrified
Carbon Cycle 2
Photic Zone
Obligatory
27. 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
Littoral Zone
Niche
Other Cycles
Desert Biome
28. The oceans
Hydrosphere
Communities
Freshwater Biomes
Thundra Animals
29. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Community
Rootlike holdfasts
Nature of Biomes
Biosphere
30. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Physical Environment-Sunlight
Material Cycles
Producers
Nekton
31. Rivers - lakes - ponds - and marshes
Environment
Freshwater Biomes
Commensalism
Physical Environment-Temperature
32. Rhododendrons and pines are more suited for growth in acid oil
Grassland Biome
Substratum-pH
Predator-Prey relationship
Intertidal Zone Population
33. Because organisms at the upper levels of the food chain derive their food energy from organisms at lower levels - and because energy is lost from one level to the next - each level can support a successively smaller biomass
Pyramid of Mass
Desert Plants
Taiga Biome
Biotic Environment
34. Include those protists and fungi that decompose dead organic matter externally and absorb the nutrients - they consistitute a vital link in the cycling of material within the ecosystem
Saprophytes
Environment
Photic Zone animals
Obligatory
35. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Hypotonic
Predator-Prey relationship
Benthos
Tropical Rain Forest Biome
36. 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 5
Nitrogen Cycle 4
Substratum (soil/rock)
Deep-sea Organisms
37. 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
Species
Carnivores
Substratum-Humus
38. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Nitrogen Cycle 2
Marshes
Tropical Rain Forest Animals
Taiga Animals
39. 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
Carbon Cycle 3
Carnivores
Coimax Vegetatioin
Competition
40. Includes the community and the environment and usually all five kingdoms
Carbon Cycle 2
Heterotrophs
Thundra Animals
Ecosystem
41. Include reproduction and protection from predators and destructive weather
Tertiary Consumers
Thundra Animals
Cohesive Force
Carnivores
42. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Polar Region
Taiga Animals
Poikilothermic (Cold Blooded)
Intertidal Zone Population
43. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Photic Zone
Taiga Plants
Photic Zone animals
Tundra Biome
44. The chief disruptive force
Competition
Organism
Carbon Cycle 2
Nitrogen Cycle 2
45. Determines water holding capacity
Marine Biomes
Desert Plants
Species
Substratum-texture
46. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Aphotic Zone
Taiga Plants
Ecosystem
Heterotrophs
47. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Temperate Deciduous Forest Biome
Nitrogen
Intraspecific Interactions
Omnivores
48. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Carbon Cycle 1
Food Chain
Ecology
Decomposer
49. Free-living organisms that feed on other living organisms
Predators
Thundra Animals
Obligatory
Temperate Deciduous Forest Plants
50. Symbiotic relationship from which both organisms derive some benefit
Temperate Coniferous Plants
Mutualims
Second Law of Thermodynamics
Hydrosphere