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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. The chief disruptive force
Coimax Vegetatioin
Dominant Species
Material Cycles
Competition
2. 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
Hemeothermic (Warm Blooded)
Pyramid of Mass
Communities
Population
3. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Competition Same Niche 2
Omnivores
Scavengers
Poikilothermic (Cold Blooded)
4. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Aquatic Biomes
Benthos
Nitrogen Cycle 3
Other Cycles
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
Desert Biome
Temperate Deciduous Forest Plants
Substratum-texture
Climate and weather
6. Integrated system of species that are dependent upon one another for survival
Coimax Vegetatioin
Intertidal Zone Population
Poikilothermic (Cold Blooded)
Community
7. Vegetation such as vines and eppiphytes
Hypotonic
Tropical Rain Forest Plants
Conditions for stability in an Ecosystem
Symbionts
8. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Substratum-pH
Environmental Factors
Hydrosphere
Abiotic (Physical) Environment
9. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Heterotrophs
Polar Region
Photic Zone animals
Aquatic Biomes
10. Region typical of the open seas and can be divided into photic and aphotic zones
Communities
Deep-sea Organisms
Littoral Zone Populations
Pelagic Zone
11. Animals that consume only plants or plant foods
Herbivores
Competition
Nitrogen Cycle 5
Coimax Vegetatioin
12. Group of organisms of the same species living together in a given location
Littoral Zone
Desert Biome
Biome
Population
13. Include reproduction and protection from predators and destructive weather
Intertidal Zone Population
Ecosystem
Cohesive Force
Littoral Zone Populations
14. Determines water holding capacity
Substratum-texture
Omnivores
Rootlike holdfasts
Intertidal Zone
15. Algae - crabs - crustacea - and many different species of fish
Competition Same Niche
Decomposer
Littoral Zone Populations
Predator-Prey relationship
16. The study of interactions between organisms and their environment
Intertidal Zone
Competition Same Niche
Ecology
Successive Communities
17. 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
Grassland Biome
Intraspecific Interactions
Ecosystem
18. One that exerts control over the other species that are present
Dominant Species
Tropical Rain Forest Animals
Mutualims
Intraspecific Interactions
19. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Ecological Succession
Nature of Biomes
Population
Second Law of Thermodynamics
20. Polar bears - musk oxen - and arctic hens
Thundra Animals
Substratum-Minerals
Obligatory
Abiotic (Physical) Environment
21. Animals that feed on secondary consumer
Herbivores
Tertiary Consumers
Hydrosphere
Saprophytes
22. Animals that eat both plants and animals
Pyramid of Mass
Desert Plants
Organism
Omnivores
23. 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
Environmental Factors
Intertidal Zone
Autotrophs
Carbon Cycle 2
24. 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
Thundra Animals
Second Law of Thermodynamics
Photic Zone animals
Aphotic Zone animals
25. 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
Competition Same Niche 3
Climate and weather
Organism
Obligatory
26. Food chain is not a simple linear chain but an intricate web
Environment
Tundra Biome
Food Web
Nitrogen Cycle 4
27. Organisms that manufacture their own food
Community
Coimax Vegetatioin
Producers
Autotrophs
28. 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
Species
Food Web
Taiga Biome
Osmoregulation
29. Any group of similar organisms that are capable of reproducing
Grassland Animals
Environmental Factors
Commensalism
Species
30. Used to include only the population and not their physical environment
Food Chain
Deep-sea Organisms
Photic Zone animals
Biotic Community
31. 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
Conditions for stability in an Ecosystem
Carnivores
Predators
Poikilothermic (Cold Blooded)
32. 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
Primary Consumers
Nitrogen Cycle 4
Omnivores
Food Pyramids
33. 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
Epiphytes
Scavengers
Thundra Animals
34. Animals that consume primary consumers (carnivores)
Osmoregulation
Carbon Cycle 1
Secondary Consumers
Scavengers
35. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Temperate Deciduous Forest Plants
Photic zone
Symbionts
Saprophytes
36. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Coimax Vegetatioin
Environmental Factors
Aphotic Zone
Marine Biomes
37. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Physical Environment- Water
Temperate Coniferous Plants
Primary Consumers
Climax Community
38. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Mutualims
Producers
Taiga Plants
Substratum-Humus
39. Two fates await the ammonia (NH3). some are nitrified or dentrified
Substratum-Humus
Nitrogen Cycle 5
Successive Communities
Temperate Deciduous Forest Animals
40. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Secondary Consumers
Obligatory
Environment
Pyramid of Numbers
41. Determine by the amount of decaying plant and animal life in the soil
Successive Communities
Substratum-Humus
Food Pyramids
Material Cycles
42. Forest floors contain moss and lichens
Substratum-pH
Taiga Plants
Marine Biomes
Nekton
43. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Climax Community
Ecosystem
Carbon Cycle 1
Taiga Animals
44. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Biosphere
Heterotrophs
Scavengers
Predator-Prey relationship
45. Freshwater Biomes vs. Saltwater 1: Freshwater is _______________ which results in the passage of water into the cell. Freshwater organisms have homeostatic mechanisms to maintain water balance by the regular removal of the excess water. these include
Hypotonic
Littoral Zone Populations
Temperate Deciduous Forest Animals
Grassland Biome
46. 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
Food Pyramids
Hemeothermic (Warm Blooded)
Species
Material Cycles
47. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Predators
Obligatory
Temperate Deciduous Forest Biome
Climate and weather
48. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Organism
Cohesive Force
Benthos
Species
49. 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
Marine Biomes
Other Cycles
Saprophytes
Organism
50. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Marine Biomes
Taiga Plants
Photic Zone animals
Tropical Rain Forest Animals