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Test your basic knowledge |
PCAT Biology Ecology
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Subjects
:
pcat
,
biology
Instructions:
Answer 50 questions in 15 minutes.
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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. 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
Littoral Zone Populations
Temperate Coniferous Forest Biome
Carbon Cycle 3
Tundra Biome
2. 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
Substratum-Minerals
Intraspecific Interactions
Temperate Coniferous Plants
Pyramid of Numbers
3. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Climax Community
Nekton
Ecosystem
Competition Same Niche 3
4. 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
Marshes
Photic zone
Tundra Plants
5. 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
Decomposer
Community
Taiga Biome
Desert Biome
6. Community in an ecological succession is identified by a dominant species
Sere
Temperate Coniferous Plants
Benthos
Tropical Rain Forest Plants
7. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Aphotic Zone animals
Symbionts
Pyramid of Mass
Nitrogen cycle 1
8. 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
Intertidal Zone
Pelagic Zone
Climate and weather
Desert Plants
9. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Climax Community
Predator-Prey relationship
Carbon Cycle 3
Environmental Factors
10. 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
Rootlike holdfasts
Conditions for stability in an Ecosystem
Nature of Biomes
Aquatic Biomes
11. First to resettle a virgin area
Tropical Rain Forest Biome
Population
Pioneer Organism
Pyramid of Numbers
12. The chief disruptive force
Competition
Dominant Species
Symbionts
Conditions for stability in an Ecosystem
13. The oceans
Marine Biomes
Hydrosphere
Intraspecific Interactions
Food Pyramids
14. When a parasite benefits at the expense of the host
Tundra Biome
Parasitism
Successive Communities
Desert Plants
15. Any group of similar organisms that are capable of reproducing
Epiphytes
Mutualims
Ecosystem
Species
16. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Obligatory
Nitrogen cycle 1
Desert Biome
17. Animals that consume only plants or plant foods
Herbivores
Carbon Cycle 2
Hemeothermic (Warm Blooded)
Sere
18. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Desert Biome
Ecology
Lithosphere
Biotic Environment
19. Crawling and sessile organsms
Biotic Community
Benthos
Competition Same Niche 3
Pelagic Zone
20. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Aquatic Biomes
Hemeothermic (Warm Blooded)
Physical Environment-Temperature
Symbionts
21. Determined by the same decisive factors-temperatures and rainfall
Nature of Biomes
Climate and weather
Biotic Environment
Competition Same Niche 2
22. Two fates await the ammonia (NH3). some are nitrified or dentrified
Marshes
Decomposer
Nitrogen Cycle 5
Mutualims
23. Rhododendrons and pines are more suited for growth in acid oil
Commensalism
Substratum-pH
Pelagic Zone
Abiotic (Physical) Environment
24. Animals that eat both plants and animals
Polar Region
Biosphere
Omnivores
Desert Biome
25. When one organism is benefited by the association and the other is not affected
Cohesive Force
Substratum-Humus
Intraspecific Interactions
Commensalism
26. Free-living organisms that feed on other living organisms
Abiotic (Physical) Environment
Predators
Climax Community
Taiga Animals
27. 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
Abiotic (Physical) Environment
Substratum-texture
Pelagic Zone
Niche
28. The study of interactions between organisms and their environment
Temperate Coniferous Plants
Ecology
Primary Consumers
Pioneer Organism
29. Animals that consume dead animals
Rootlike holdfasts
Tropical Rain Forest Animals
Scavengers
Hypotonic
30. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Nitrified
Nitrogen Cycle 5
Biosphere
Successive Communities
31. Regiong beneatht he photic zone that receives no light
Nitrogen Cycle 2
Biosphere
Aphotic Zone
Commensalism
32. Determines water holding capacity
Nitrogen Cycle 2
Ecosystem
Substratum-texture
Coimax Vegetatioin
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
Nitrogen Cycle 2
Nitrogen Cycle 3
Nitrogen cycle 1
Osmoregulation
34. Lichens and moss
Nitrogen Cycle 3
Aquatic Biomes
Substratum-Minerals
Tundra Plants
35. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Osmoregulation
Poikilothermic (Cold Blooded)
Aphotic Zone
Grassland Biome
36. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Biosphere
Obligatory
Poikilothermic (Cold Blooded)
Photic zone
37. Include saprophytic organisms and organisms of decay
Communities
Tropical Rain Forest Animals
Dominant Species
Decomposer
38. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Abiotic (Physical) Environment
Temperate Deciduous Forest Plants
Ecological Succession
Nitrogen Cycle 2
39. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Producers
Nitrogen Cycle 2
Desert animals
Benthos
40. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Substratum (soil/rock)
Food Pyramids
Physical Environment-Temperature
Pyramid of Mass
41. Used to include only the population and not their physical environment
Carnivores
Biotic Community
Carbon Cycle 3
Photic Zone animals
42. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Conditions for stability in an Ecosystem
Heterotrophs
Aphotic Zone animals
Predator-Prey relationship
43. Needs constant energy source and cycling of materials between the living system
Hydrosphere
Pyramid of Energy
Conditions for stability in an Ecosystem
Epiphytes
44. 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
Nitrogen Cycle 2
Tertiary Consumers
Freshwater Biomes
45. 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 1
Epiphytes
Ecology
Biosphere
46. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Intertidal Zone
Nitrogen
Temperate Deciduous Forest Biome
Temperate Coniferous Plants
47. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Competition Same Niche
Grassland Biome
Ecological Succession
Pyramid of Mass
48. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Competition Same Niche
Sere
Mutualims
Pyramid of Numbers
49. Recycle water - oxygen - and phosphorus
Polar Region
Biotic Community
Second Law of Thermodynamics
Other Cycles
50. 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
Dominant Species
Hypotonic
Grassland Biome
Ecosystem
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