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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. One or both organisms can't survive without the other
Intraspecific Interactions
Obligatory
Second Law of Thermodynamics
Conditions for stability in an Ecosystem
2. Regiong beneatht he photic zone that receives no light
Deep-sea Organisms
Tropical Rain Forest Biome
Aphotic Zone
Pyramid of Energy
3. 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
Food Pyramids
Secondary Consumers
Parasitism
Carbon Cycle 1
4. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Climate and weather
Secondary Consumers
Tropical Rain Forest Animals
Aphotic Zone animals
5. The vegetation that becomes dominant and stable after years of evolutiionary development
Communities
Predator-Prey relationship
Intertidal Zone
Coimax Vegetatioin
6. Animals that consume green plants (herbivores)
Community
Photic zone
Temperate Deciduous Forest Animals
Primary Consumers
7. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Desert animals
Dentrified
Organism
Omnivores
8. Organisms that manufacture their own food
Aquatic Biomes
Autotrophs
Temperate Deciduous Forest Biome
Substratum-Minerals
9. Lichens and moss
Organism
Ecology
Tundra Plants
Abiotic (Physical) Environment
10. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Physical Environment-Temperature
Benthos
Predator-Prey relationship
Ecology
11. Needs constant energy source and cycling of materials between the living system
Intraspecific Interactions
Conditions for stability in an Ecosystem
Physical Environment- Water
Second Law of Thermodynamics
12. Community in an ecological succession is identified by a dominant species
Tundra Plants
Sere
Secondary Consumers
Competition
13. 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
Carbon Cycle 2
Taiga Biome
Nitrogen Cycle 2
Carbon Cycle 1
14. Sunlit layer of the open sea extending to a depth of 250-600ft
Lithosphere
Photic zone
Hemeothermic (Warm Blooded)
Hydrosphere
15. Two fates await the ammonia (NH3). some are nitrified or dentrified
Nitrogen Cycle 5
Pyramid of Energy
Grassland Biome
Physical Environment-Sunlight
16. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Biotic Community
Population
Saprophytes
Ecological Succession
17. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Photic Zone
Mutualims
Tundra Plants
Nitrogen Cycle 5
18. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Carbon Cycle 3
Benthos
Desert animals
Nitrogen
19. Only animal life and other heterotrophic life exists
Niche
Nitrogen Cycle 4
Aphotic Zone
Poikilothermic (Cold Blooded)
20. Rivers - lakes - ponds - and marshes
Freshwater Biomes
Physical Environment- Water
Producers
Desert Plants
21. The ultimate source of energy for all organisms
Carbon Cycle 3
Physical Environment-Sunlight
Physical Environment-Temperature
Commensalism
22. The study of interactions between organisms and their environment
Pioneer Organism
Ecology
Marine Biomes
Freshwater Biomes
23. 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
Material Cycles
Tertiary Consumers
Rootlike holdfasts
Decomposer
24. One that exerts control over the other species that are present
Dominant Species
Desert Biome
Competition
Carbon Cycle 1
25. 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
Thundra Animals
Desert animals
Taiga Biome
Temperate Coniferous Plants
26. First to resettle a virgin area
Pioneer Organism
Photic zone
Thundra Animals
Carbon Cycle 3
27. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Polar Region
Physical Environment-Temperature
Niche
Intertidal Zone Population
28. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Epiphytes
Symbionts
Substratum-pH
Marine Biomes
29. 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
Sere
Aquatic Biomes
Taiga Animals
Desert Plants
30. Links between oceans and land
Primary Consumers
Marshes
Nature of Biomes
Ecological Succession
31. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Food Chain
Producers
Nitrogen Cycle 3
Primary Consumers
32. Animals that eat both plants and animals
Omnivores
Tropical Rain Forest Plants
Nitrogen Cycle 4
Carbon Cycle 2
33. 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
Tundra Biome
Climax Community
Obligatory
Desert Biome
34. Rhododendrons and pines are more suited for growth in acid oil
Taiga Animals
Temperate Coniferous Plants
Intraspecific Interactions
Substratum-pH
35. 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
Substratum-Humus
Predator-Prey relationship
Niche
Hydrosphere
36. Determines water holding capacity
Tundra Plants
Tertiary Consumers
Substratum-texture
Aphotic Zone animals
37. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Nitrogen cycle 1
Tropical Rain Forest Animals
Littoral Zone
Deep-sea Organisms
38. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Marine Biomes
Tundra Biome
Photic Zone
Producers
39. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Polar Region
Tundra Plants
Ecology
Environmental Factors
40. 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
Lithosphere
Substratum-texture
Marine Biomes
Pyramid of Mass
41. Distinct community in a geographic region
Biome
Producers
Nitrogen Cycle 4
Carbon Cycle 3
42. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Nitrogen
Herbivores
Substratum-Humus
Carbon Cycle 1
43. Nekton and benthos - scavengers - and predators (fiercely competitive)
Epiphytes
Osmoregulation
Aphotic Zone animals
Obligatory
44. Any group of similar organisms that are capable of reproducing
Species
Competition
Photic Zone animals
Biotic Environment
45. Determines the nature of plant and animal life in the soil
Environmental Factors
Climate and weather
Substratum (soil/rock)
Aphotic Zone
46. Animals that consume primary consumers (carnivores)
Nitrogen Cycle 5
Secondary Consumers
Primary Consumers
Climax Community
47. Adaptations for maintaining their internal osmolarity and conserving water
Hemeothermic (Warm Blooded)
Carnivores
Grassland Biome
Osmoregulation
48. One species may be competitively superior to the other and drive the second to extinction
Competition Same Niche
Organism
Temperate Coniferous Forest Biome
Pyramid of Energy
49. Algae - crabs - crustacea - and many different species of fish
Nitrogen
Food Pyramids
Hydrosphere
Littoral Zone Populations
50. Include reproduction and protection from predators and destructive weather
Mutualims
Cohesive Force
Second Law of Thermodynamics
Ecological Succession