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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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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. When a parasite benefits at the expense of the host
Physical Environment-Sunlight
Herbivores
Physical Environment-Temperature
Parasitism
2. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Photic Zone
Biotic Environment
Symbionts
Heterotrophs
3. Determines the nature of plant and animal life in the soil
Grassland Biome
Littoral Zone Populations
Substratum (soil/rock)
Aphotic Zone
4. Treeless - frozen plain found between the taiga lands and the northern ice sheets - very short summer and thus a very short growing season during which time the ground becomes wet and marshy
Autotrophs
Deep-sea Organisms
Tundra Biome
Environmental Factors
5. 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
Nitrogen Cycle 3
Grassland Biome
Freshwater Biomes
Osmoregulation
6. Animals that eat both plants and animals
Epiphytes
Aphotic Zone
Physical Environment-Temperature
Omnivores
7. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Tertiary Consumers
Grassland Biome
Temperate Deciduous Forest Plants
Successive Communities
8. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Heterotrophs
Other Cycles
Pyramid of Mass
Substratum-texture
9. Adaptations for maintaining their internal osmolarity and conserving water
Secondary Consumers
Osmoregulation
Biotic Environment
Biosphere
10. Determines water holding capacity
Population
Substratum-texture
Conditions for stability in an Ecosystem
Epiphytes
11. Animals that consume primary consumers (carnivores)
Intraspecific Interactions
Secondary Consumers
Organism
Littoral Zone Populations
12. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Environmental Factors
Biome
Food Chain
Competition Same Niche 2
13. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Food Web
Tropical Rain Forest Animals
Littoral Zone
Temperate Deciduous Forest Plants
14. Affect the type of vegetation that can be supported
Decomposer
Temperate Deciduous Forest Animals
Substratum-Minerals
Predator-Prey relationship
15. The major component of the internal environment of all living things
Aquatic Biomes
Ecology
Scavengers
Physical Environment- Water
16. Integrated system of species that are dependent upon one another for survival
Marine Biomes
Photic Zone
Littoral Zone Populations
Community
17. Two fates await the ammonia (NH3). some are nitrified or dentrified
Nitrogen Cycle 2
Nitrogen Cycle 5
Tropical Rain Forest Animals
Food Pyramids
18. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Substratum-Humus
Polar Region
Predators
Nitrogen cycle 1
19. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Community
Benthos
Material Cycles
Hydrosphere
20. Composed of populations that are able to exist under the new conditions
Food Pyramids
Successive Communities
Conditions for stability in an Ecosystem
Environmental Factors
21. Deer - fox - woodchuck - and squirrel
Species
Lithosphere
Tropical Rain Forest Biome
Temperate Deciduous Forest Animals
22. Nekton and benthos - scavengers - and predators (fiercely competitive)
Population
Aphotic Zone animals
Pyramid of Numbers
Intertidal Zone Population
23. Conserve water actively
Predators
Nitrogen Cycle 4
Aphotic Zone
Desert Plants
24. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Food Chain
Environment
Organism
Tundra Biome
25. 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 Mass
Coimax Vegetatioin
Intertidal Zone Population
Marine Biomes
26. 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
Climax Community
Tundra Plants
Saprophytes
Herbivores
27. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Intertidal Zone
Physical Environment- Water
Ecological Succession
Nitrogen Cycle 2
28. 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
Taiga Animals
Pyramid of Energy
Ecology
Grassland Animals
29. Any group of similar organisms that are capable of reproducing
Dentrified
Species
Benthos
Taiga Biome
30. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Benthos
Substratum-Humus
Biotic Community
Hemeothermic (Warm Blooded)
31. Recycle water - oxygen - and phosphorus
Other Cycles
Obligatory
Intertidal Zone Population
Tropical Rain Forest Biome
32. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Nitrogen Cycle 4
Pyramid of Mass
Environmental Factors
Taiga Biome
33. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Freshwater Biomes
Dentrified
Omnivores
Population
34. Animals that consume dead animals
Predators
Poikilothermic (Cold Blooded)
Food Pyramids
Scavengers
35. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Biotic Environment
Ecological Succession
Nitrogen cycle 1
Temperate Coniferous Plants
36. Food chain is not a simple linear chain but an intricate web
Photic zone
Obligatory
Food Web
Nitrogen Cycle 5
37. Include saprophytic organisms and organisms of decay
Heterotrophs
Thundra Animals
Decomposer
Predator-Prey relationship
38. Rock and soil surface
Pyramid of Numbers
Lithosphere
Taiga Biome
Intertidal Zone
39. Region typical of the open seas and can be divided into photic and aphotic zones
Pyramid of Energy
Climax Community
Intraspecific Interactions
Pelagic Zone
40. Includes climate - temperature - availability of light and water - and the local topology
Decomposer
Deep-sea Organisms
Abiotic (Physical) Environment
Carnivores
41. 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
Substratum-pH
Ecosystem
Rootlike holdfasts
Carbon Cycle 3
42. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Temperate Coniferous Forest Biome
Temperate Deciduous Forest Biome
Intraspecific Interactions
Taiga Animals
43. When one organism is benefited by the association and the other is not affected
Marine Biomes
Biotic Environment
Commensalism
Carnivores
44. Algae - crabs - crustacea - and many different species of fish
Aquatic Biomes
Littoral Zone Populations
Niche
Littoral Zone
45. Polar bears - musk oxen - and arctic hens
Thundra Animals
Competition Same Niche 2
Dominant Species
Nitrogen Cycle 3
46. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Biome
Food Pyramids
Desert animals
Temperate Coniferous Plants
47. Needs constant energy source and cycling of materials between the living system
Poikilothermic (Cold Blooded)
Aphotic Zone
Nitrified
Conditions for stability in an Ecosystem
48. 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
Producers
Substratum-Humus
Herbivores
Taiga Biome
49. 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
Obligatory
Predator-Prey relationship
Substratum (soil/rock)
Carnivores
50. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Pyramid of Numbers
Grassland Biome
Food Web
Cohesive Force
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