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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. Distinct community in a geographic region
Coimax Vegetatioin
Climax Community
Grassland Animals
Biome
2. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Poikilothermic (Cold Blooded)
Tundra Biome
Desert animals
3. Deer - fox - woodchuck - and squirrel
Carbon Cycle 3
Competition Same Niche
Temperate Deciduous Forest Animals
Pioneer Organism
4. Integrated system of species that are dependent upon one another for survival
Poikilothermic (Cold Blooded)
Conditions for stability in an Ecosystem
Desert Biome
Community
5. 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
Osmoregulation
Biotic Environment
Herbivores
Tundra Biome
6. Conserve water actively
Polar Region
Scavengers
Desert Plants
Hydrosphere
7. Determines the nature of plant and animal life in the soil
Carbon Cycle 2
Nature of Biomes
Substratum (soil/rock)
Commensalism
8. Sunlit layer of the open sea extending to a depth of 250-600ft
Material Cycles
Scavengers
Dentrified
Photic zone
9. 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
Population
Rootlike holdfasts
Conditions for stability in an Ecosystem
Pyramid of Mass
10. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Competition
Pyramid of Mass
Substratum-Minerals
Food Chain
11. One or both organisms can't survive without the other
Sere
Predators
Obligatory
Dentrified
12. Consists of populations of different plants and animal species interacting with each other in a given environment
Commensalism
Mutualims
Dentrified
Communities
13. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Hemeothermic (Warm Blooded)
Epiphytes
Physical Environment-Sunlight
Biotic Environment
14. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Decomposer
Ecology
Nitrified
Lithosphere
15. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Taiga Plants
Temperate Deciduous Forest Biome
Abiotic (Physical) Environment
Desert Plants
16. Food chain is not a simple linear chain but an intricate web
Substratum-pH
Osmoregulation
Photic Zone
Food Web
17. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Tropical Rain Forest Biome
Commensalism
Aquatic Biomes
Temperate Coniferous Plants
18. Any group of similar organisms that are capable of reproducing
Other Cycles
Species
Nitrogen Cycle 5
Substratum-pH
19. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Biosphere
Biome
Temperate Coniferous Forest Biome
Nekton
20. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Physical Environment-Temperature
Thundra Animals
Rootlike holdfasts
Environmental Factors
21. 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
Desert animals
Freshwater Biomes
Littoral Zone Populations
Nitrogen cycle 1
22. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Intertidal Zone
Conditions for stability in an Ecosystem
Substratum-texture
Nitrogen Cycle 3
23. 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
Pioneer Organism
Climate and weather
Successive Communities
Biosphere
24. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Competition Same Niche 3
Ecological Succession
Pyramid of Energy
Biosphere
25. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Tropical Rain Forest Animals
Sere
Substratum-Minerals
Poikilothermic (Cold Blooded)
26. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Pyramid of Numbers
Community
Taiga Animals
Deep-sea Organisms
27. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Food Pyramids
Grassland Biome
Dentrified
Successive Communities
28. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Taiga Plants
Environmental Factors
Photic Zone animals
Predator-Prey relationship
29. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Saprophytes
Desert animals
Abiotic (Physical) Environment
Polar Region
30. Needs constant energy source and cycling of materials between the living system
Littoral Zone Populations
Conditions for stability in an Ecosystem
Aphotic Zone animals
Poikilothermic (Cold Blooded)
31. The metabolically produced CO2 is released to the air. The rest of the orgnaic carbon remains locked whthin an organism until its death (except for wastes given off) - at which time decay processes by bacteria return the CO2 to the air
Temperate Deciduous Forest Animals
Hydrosphere
Carbon Cycle 3
Ecosystem
32. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Communities
Taiga Animals
Successive Communities
Competition Same Niche 3
33. 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
Carbon Cycle 3
Taiga Biome
Desert Biome
Physical Environment-Sunlight
34. 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
Pyramid of Mass
Nitrogen Cycle 2
Species
Carnivores
35. 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
Hydrosphere
Successive Communities
Substratum-pH
Food Pyramids
36. 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
Niche
Mutualims
Photic Zone
Community
37. The vegetation that becomes dominant and stable after years of evolutiionary development
Epiphytes
Coimax Vegetatioin
Pyramid of Mass
Pelagic Zone
38. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Environmental Factors
Littoral Zone
Competition Same Niche 3
Temperate Coniferous Plants
39. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Substratum-texture
Marine Biomes
Niche
Grassland Animals
40. Composed of populations that are able to exist under the new conditions
Organism
Herbivores
Carbon Cycle 1
Successive Communities
41. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Heterotrophs
Obligatory
Aquatic Biomes
Tropical Rain Forest Plants
42. Regiong beneatht he photic zone that receives no light
Material Cycles
Parasitism
Aphotic Zone
Lithosphere
43. 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
Aphotic Zone animals
Taiga Animals
Desert Biome
Intertidal Zone Population
44. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Herbivores
Nitrogen
Temperate Coniferous Forest Biome
Secondary Consumers
45. One that exerts control over the other species that are present
Climax Community
Dominant Species
Pyramid of Numbers
Ecology
46. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Mutualims
Parasitism
Nitrogen
Hemeothermic (Warm Blooded)
47. 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
Intraspecific Interactions
Cohesive Force
Desert Biome
Intertidal Zone Population
48. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Aphotic Zone
Poikilothermic (Cold Blooded)
Producers
Biosphere
49. Symbiotic relationship from which both organisms derive some benefit
Nitrogen Cycle 4
Mutualims
Nitrogen cycle 1
Successive Communities
50. The oceans
Lithosphere
Communities
Substratum-pH
Hydrosphere