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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. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Herbivores
Symbionts
Pyramid of Energy
Food Web
2. 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
Benthos
Carnivores
Temperate Deciduous Forest Biome
Temperate Deciduous Forest Animals
3. Symbiotic relationship from which both organisms derive some benefit
Mutualims
Producers
Intertidal Zone
Ecology
4. The oceans
Biosphere
Hydrosphere
Epiphytes
Taiga Animals
5. 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
Climate and weather
Abiotic (Physical) Environment
Marine Biomes
Competition Same Niche 3
6. Determine by the amount of decaying plant and animal life in the soil
Nitrogen Cycle 3
Tropical Rain Forest Biome
Substratum-Humus
Heterotrophs
7. Animals that consume only plants or plant foods
Aphotic Zone
Herbivores
Nitrogen Cycle 3
Freshwater Biomes
8. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Predator-Prey relationship
Aquatic Biomes
Conditions for stability in an Ecosystem
Tropical Rain Forest Biome
9. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Heterotrophs
Predators
Temperate Coniferous Plants
Nitrogen Cycle 5
10. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Photic Zone
Epiphytes
Grassland Biome
Competition Same Niche 3
11. Community in an ecological succession is identified by a dominant species
Marine Biomes
Taiga Biome
Sere
Food Chain
12. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Poikilothermic (Cold Blooded)
Photic Zone
Taiga Animals
Temperate Deciduous Forest Plants
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
Benthos
Osmoregulation
Carbon Cycle 2
Producers
14. Rock and soil surface
Lithosphere
Aphotic Zone
Producers
Heterotrophs
15. Polar bears - musk oxen - and arctic hens
Grassland Animals
Thundra Animals
Physical Environment- Water
Biome
16. Animals that consume primary consumers (carnivores)
Secondary Consumers
Carbon Cycle 3
Aphotic Zone
Material Cycles
17. Include reproduction and protection from predators and destructive weather
Cohesive Force
Food Pyramids
Nitrogen cycle 1
Rootlike holdfasts
18. 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
Decomposer
Littoral Zone
Lithosphere
Niche
19. 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 Numbers
Pyramid of Mass
Tertiary Consumers
Littoral Zone Populations
20. Determines the nature of plant and animal life in the soil
Substratum (soil/rock)
Coimax Vegetatioin
Nitrogen Cycle 5
Climate and weather
21. When a parasite benefits at the expense of the host
Benthos
Predator-Prey relationship
Ecosystem
Parasitism
22. 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
Taiga Plants
Polar Region
Heterotrophs
Nitrogen cycle 1
23. 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
Herbivores
Marshes
Aphotic Zone
Grassland Biome
24. 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
Competition Same Niche
Saprophytes
Predators
Tertiary Consumers
25. Every energy transfer involves a loss of energy and each level of the food chain uses some of the energy it obtains from the food for its own metabolism and loses some additional energy in the form of heat
Food Pyramids
Photic zone
Second Law of Thermodynamics
Deep-sea Organisms
26. One that exerts control over the other species that are present
Organism
Substratum (soil/rock)
Dominant Species
Coimax Vegetatioin
27. Determines water holding capacity
Carbon Cycle 3
Osmoregulation
Substratum-texture
Food Chain
28. Sunlit layer of the open sea extending to a depth of 250-600ft
Hemeothermic (Warm Blooded)
Population
Biotic Community
Photic zone
29. 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
Tropical Rain Forest Animals
Food Pyramids
Physical Environment-Sunlight
30. 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
Autotrophs
Tropical Rain Forest Plants
Food Pyramids
Polar Region
31. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Ecosystem
Herbivores
Freshwater Biomes
Tropical Rain Forest Biome
32. Only animal life and other heterotrophic life exists
Sere
Tundra Biome
Aphotic Zone
Community
33. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Successive Communities
Communities
Epiphytes
Food Web
34. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Rootlike holdfasts
Carbon Cycle 1
Marine Biomes
Tropical Rain Forest Biome
35. Links between oceans and land
Pelagic Zone
Marshes
Coimax Vegetatioin
Biosphere
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 4
Environment
Decomposer
Hypotonic
37. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Nitrogen Cycle 3
Deep-sea Organisms
Tertiary Consumers
Food Pyramids
38. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Niche
Biotic Environment
Temperate Coniferous Forest Biome
Carbon Cycle 1
39. Regiong beneatht he photic zone that receives no light
Substratum (soil/rock)
Competition Same Niche
Physical Environment-Temperature
Aphotic Zone
40. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Producers
Symbionts
Decomposer
Nitrogen Cycle 4
41. Includes climate - temperature - availability of light and water - and the local topology
Thundra Animals
Littoral Zone Populations
Taiga Plants
Abiotic (Physical) Environment
42. Affect the type of vegetation that can be supported
Climax Community
Substratum-Minerals
Physical Environment-Sunlight
Tropical Rain Forest Animals
43. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Poikilothermic (Cold Blooded)
Herbivores
Benthos
Taiga Plants
44. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Food Chain
Photic Zone animals
Pyramid of Energy
Pelagic Zone
45. 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
Ecology
Pyramid of Energy
Communities
Species
46. Lichens and moss
Commensalism
Temperate Coniferous Forest Biome
Poikilothermic (Cold Blooded)
Tundra Plants
47. 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 Populations
Desert Biome
Marshes
Pyramid of Numbers
48. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Desert Plants
Ecological Succession
Temperate Coniferous Forest Biome
Other Cycles
49. Include saprophytic organisms and organisms of decay
Cohesive Force
Substratum-Humus
Decomposer
Temperate Deciduous Forest Animals
50. Organisms that manufacture their own food
Epiphytes
Environment
Cohesive Force
Autotrophs