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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. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Organism
Littoral Zone Populations
Aphotic Zone animals
Cohesive Force
2. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Epiphytes
Secondary Consumers
Producers
Intertidal Zone Population
3. 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
Predator-Prey relationship
Biosphere
Aquatic Biomes
Herbivores
4. Rhododendrons and pines are more suited for growth in acid oil
Substratum-pH
Biosphere
Pioneer Organism
Carbon Cycle 3
5. The vegetation that becomes dominant and stable after years of evolutiionary development
Nitrogen Cycle 3
Temperate Deciduous Forest Animals
Substratum-pH
Coimax Vegetatioin
6. 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
Decomposer
Competition Same Niche
Temperate Coniferous Forest Biome
Intraspecific Interactions
7. Include reproduction and protection from predators and destructive weather
Cohesive Force
Competition Same Niche 2
Temperate Deciduous Forest Plants
Temperate Deciduous Forest Animals
8. Animals that feed on secondary consumer
Tropical Rain Forest Biome
Littoral Zone Populations
Deep-sea Organisms
Tertiary Consumers
9. 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
Successive Communities
Pyramid of Energy
Substratum-pH
Tertiary Consumers
10. 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
Ecosystem
Environment
Marine Biomes
Desert Biome
11. Distinct community in a geographic region
Biome
Ecosystem
Tropical Rain Forest Plants
Desert Biome
12. Two species may rapidly evolve in divergent directions under the strong selection pressure resulting from intense competition. thus - the two species would rapidly evolve greater differences in their niches
Competition Same Niche 3
Abiotic (Physical) Environment
Material Cycles
Parasitism
13. 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
Carbon Cycle 3
Competition Same Niche 2
Herbivores
Nekton
14. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Nature of Biomes
Tropical Rain Forest Animals
Poikilothermic (Cold Blooded)
Hemeothermic (Warm Blooded)
15. First to resettle a virgin area
Other Cycles
Nature of Biomes
Pioneer Organism
Environment
16. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Deep-sea Organisms
Biotic Community
Tropical Rain Forest Biome
Nekton
17. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Tundra Plants
Rootlike holdfasts
Species
Producers
18. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Food Chain
Hydrosphere
Predator-Prey relationship
Photic Zone
19. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Symbionts
Tundra Biome
Biotic Community
Competition Same Niche 2
20. Regiong beneatht he photic zone that receives no light
Aphotic Zone
Species
Desert Biome
Dominant Species
21. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Substratum-texture
Communities
Desert animals
Successive Communities
22. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Physical Environment-Temperature
Climate and weather
Population
Temperate Deciduous Forest Animals
23. Include saprophytic organisms and organisms of decay
Decomposer
Photic zone
Second Law of Thermodynamics
Community
24. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Niche
Predators
Material Cycles
Taiga Biome
25. 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
Organism
Hydrosphere
Carbon Cycle 1
Pyramid of Numbers
26. 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
Carbon Cycle 2
Competition
Food Pyramids
Nitrogen cycle 1
27. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Environment
Intertidal Zone
Tertiary Consumers
Nitrogen Cycle 4
28. Only animal life and other heterotrophic life exists
Substratum-pH
Aphotic Zone
Photic Zone animals
Other Cycles
29. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Hemeothermic (Warm Blooded)
Littoral Zone
Nitrogen Cycle 4
Hypotonic
30. Vegetation such as vines and eppiphytes
Intertidal Zone Population
Coimax Vegetatioin
Rootlike holdfasts
Tropical Rain Forest Plants
31. The study of interactions between organisms and their environment
Substratum-pH
Tertiary Consumers
Ecology
Hypotonic
32. Free-living organisms that feed on other living organisms
Nitrogen
Biotic Community
Predators
Tertiary Consumers
33. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Substratum-texture
Polar Region
Abiotic (Physical) Environment
Photic Zone
34. Used to include only the population and not their physical environment
Secondary Consumers
Substratum-Humus
Obligatory
Biotic Community
35. Rivers - lakes - ponds - and marshes
Commensalism
Freshwater Biomes
Ecology
Ecosystem
36. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Taiga Biome
Competition
Nekton
Tropical Rain Forest Animals
37. Group of organisms of the same species living together in a given location
Species
Population
Grassland Animals
Deep-sea Organisms
38. Animals that eat both plants and animals
Physical Environment-Temperature
Intertidal Zone Population
Omnivores
Tropical Rain Forest Biome
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
Carnivores
Littoral Zone
Tropical Rain Forest Biome
Scavengers
40. Determines water holding capacity
Photic zone
Substratum-texture
Temperate Coniferous Plants
Biosphere
41. Determine by the amount of decaying plant and animal life in the soil
Substratum-Humus
Intraspecific Interactions
Carnivores
Physical Environment- Water
42. Animals that consume primary consumers (carnivores)
Temperate Deciduous Forest Plants
Climate and weather
Freshwater Biomes
Secondary Consumers
43. The oceans
Hydrosphere
Tundra Biome
Environmental Factors
Carnivores
44. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Pyramid of Numbers
Temperate Coniferous Plants
Thundra Animals
Community
45. Adaptations for maintaining their internal osmolarity and conserving water
Lithosphere
Osmoregulation
Pyramid of Energy
Intertidal Zone Population
46. Developed long legs and many are hoofed
Competition Same Niche
Material Cycles
Taiga Plants
Grassland Animals
47. Community in an ecological succession is identified by a dominant species
Physical Environment-Temperature
Sere
Dominant Species
Intertidal Zone
48. Nekton and benthos - scavengers - and predators (fiercely competitive)
Aphotic Zone animals
Abiotic (Physical) Environment
Carbon Cycle 2
Lithosphere
49. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Biotic Community
Cohesive Force
Population
Ecological Succession
50. Composed of populations that are able to exist under the new conditions
Nitrogen cycle 1
Successive Communities
Desert Plants
Desert animals