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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. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Autotrophs
Aphotic Zone animals
Food Chain
Communities
2. Composed of populations that are able to exist under the new conditions
Sere
Temperate Deciduous Forest Biome
Intertidal Zone
Successive Communities
3. Includes the community and the environment and usually all five kingdoms
Ecosystem
Commensalism
Pyramid of Numbers
Competition
4. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Other Cycles
Tropical Rain Forest Animals
Aphotic Zone
Successive Communities
5. 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
Commensalism
Climate and weather
Aquatic Biomes
Dominant Species
6. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Competition Same Niche 3
Littoral Zone
Taiga Biome
Other Cycles
7. Include reproduction and protection from predators and destructive weather
Substratum-texture
Cohesive Force
Competition Same Niche 3
Lithosphere
8. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Symbionts
Pyramid of Mass
Climate and weather
Competition Same Niche 3
9. 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
Tertiary Consumers
Aphotic Zone
Ecosystem
Competition Same Niche 3
10. Consists of populations of different plants and animal species interacting with each other in a given environment
Obligatory
Carbon Cycle 1
Lithosphere
Communities
11. Conserve water actively
Saprophytes
Desert Plants
Tundra Plants
Second Law of Thermodynamics
12. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Nitrogen Cycle 2
Abiotic (Physical) Environment
Second Law of Thermodynamics
Tropical Rain Forest Animals
13. Nekton and benthos - scavengers - and predators (fiercely competitive)
Desert Plants
Aphotic Zone animals
Epiphytes
Deep-sea Organisms
14. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Substratum (soil/rock)
Substratum-Minerals
Environmental Factors
Nitrogen Cycle 3
15. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Taiga Animals
Nitrified
Climate and weather
Carbon Cycle 2
16. 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
Intraspecific Interactions
Carnivores
Mutualims
Aphotic Zone animals
17. Animals that eat both plants and animals
Omnivores
Competition
Ecosystem
Carbon Cycle 2
18. 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
Poikilothermic (Cold Blooded)
Freshwater Biomes
Physical Environment- Water
Taiga Biome
19. One that exerts control over the other species that are present
Dominant Species
Nekton
Producers
Environmental Factors
20. Links between oceans and land
Physical Environment-Temperature
Physical Environment-Sunlight
Herbivores
Marshes
21. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Marine Biomes
Community
Benthos
Taiga Animals
22. Animals that consume only plants or plant foods
Herbivores
Tertiary Consumers
Marine Biomes
Nitrogen Cycle 2
23. Distinct community in a geographic region
Omnivores
Niche
Biome
Intertidal Zone
24. One species may be competitively superior in some regions - and the other may be superior in other regions under different environmental conditions. this would result in the elimination of one species in some places and the other in other places
Competition Same Niche 2
Aphotic Zone
Coimax Vegetatioin
Pyramid of Numbers
25. Developed long legs and many are hoofed
Grassland Animals
Environmental Factors
Coimax Vegetatioin
Tropical Rain Forest Biome
26. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Community
Intertidal Zone
Taiga Plants
Photic Zone animals
27. Community in an ecological succession is identified by a dominant species
Environment
Obligatory
Climax Community
Sere
28. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Biotic Environment
Environment
Tropical Rain Forest Biome
Biotic Community
29. Used to include only the population and not their physical environment
Littoral Zone
Primary Consumers
Biotic Community
Substratum-texture
30. 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
Saprophytes
Nitrogen Cycle 2
Taiga Animals
Nitrogen Cycle 4
31. 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
Temperate Deciduous Forest Biome
Desert Biome
Littoral Zone
Pyramid of Numbers
32. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Grassland Biome
Temperate Deciduous Forest Animals
Physical Environment-Temperature
Heterotrophs
33. Any group of similar organisms that are capable of reproducing
Secondary Consumers
Species
Temperate Deciduous Forest Animals
Desert animals
34. Determine by the amount of decaying plant and animal life in the soil
Herbivores
Temperate Deciduous Forest Animals
Saprophytes
Substratum-Humus
35. Encompasses all that is external to the organism and is necessary for its existence
Littoral Zone
Substratum-pH
Environment
Intertidal Zone
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 2
Niche
Nitrogen Cycle 4
Tertiary Consumers
37. Crawling and sessile organsms
Intertidal Zone
Communities
Photic Zone animals
Benthos
38. Animals that consume green plants (herbivores)
Desert animals
Nitrified
Organism
Primary Consumers
39. 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
Thundra Animals
Environmental Factors
Pyramid of Mass
Competition
40. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Aphotic Zone
Environmental Factors
Nitrogen
Environment
41. Symbiotic relationship from which both organisms derive some benefit
Mutualims
Carbon Cycle 2
Photic Zone
Food Web
42. 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
Heterotrophs
Symbionts
Scavengers
Grassland Biome
43. Integrated system of species that are dependent upon one another for survival
Second Law of Thermodynamics
Herbivores
Nekton
Community
44. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Cohesive Force
Pyramid of Numbers
Grassland Biome
Tertiary Consumers
45. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Temperate Coniferous Plants
Environment
Littoral Zone
Carbon Cycle 2
46. 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
Pyramid of Energy
Pyramid of Numbers
Nitrogen Cycle 5
Intraspecific Interactions
47. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Aphotic Zone
Nekton
Marine Biomes
Conditions for stability in an Ecosystem
48. One species may be competitively superior to the other and drive the second to extinction
Marshes
Competition Same Niche
Carbon Cycle 2
Ecosystem
49. Animals that consume primary consumers (carnivores)
Nitrogen
Aquatic Biomes
Tropical Rain Forest Animals
Secondary Consumers
50. Free-living organisms that feed on other living organisms
Thundra Animals
Predators
Nekton
Autotrophs
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