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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. Determine by the amount of decaying plant and animal life in the soil
Substratum-Humus
Symbionts
Physical Environment- Water
Nitrogen Cycle 5
2. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Population
Primary Consumers
Taiga Biome
Temperate Coniferous Plants
3. Animals that consume dead animals
Nitrogen Cycle 3
Poikilothermic (Cold Blooded)
Scavengers
Photic Zone animals
4. 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
Intraspecific Interactions
Competition Same Niche 3
Aphotic Zone
Hypotonic
5. 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
Abiotic (Physical) Environment
Sere
Saprophytes
Nitrogen Cycle 4
6. Crawling and sessile organsms
Heterotrophs
Biome
Tertiary Consumers
Benthos
7. 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
Conditions for stability in an Ecosystem
Competition Same Niche 3
Competition
8. 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
Substratum-texture
Second Law of Thermodynamics
Material Cycles
Substratum-pH
9. Include saprophytic organisms and organisms of decay
Decomposer
Commensalism
Carbon Cycle 1
Biome
10. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Marine Biomes
Heterotrophs
Pyramid of Energy
Intertidal Zone Population
11. Distinct community in a geographic region
Tertiary Consumers
Physical Environment-Sunlight
Substratum-Minerals
Biome
12. Conserve water actively
Freshwater Biomes
Desert Plants
Cohesive Force
Food Pyramids
13. Regiong beneatht he photic zone that receives no light
Temperate Deciduous Forest Biome
Substratum-Humus
Pelagic Zone
Aphotic Zone
14. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Dominant Species
Nature of Biomes
Climax Community
Competition Same Niche
15. Developed long legs and many are hoofed
Tundra Plants
Grassland Animals
Substratum-pH
Benthos
16. Deer - fox - woodchuck - and squirrel
Heterotrophs
Producers
Temperate Deciduous Forest Animals
Tropical Rain Forest Animals
17. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Biome
Saprophytes
Temperate Deciduous Forest Biome
Nitrogen 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
Intertidal Zone Population
Temperate Coniferous Plants
Taiga Biome
Substratum-pH
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 Mass
Littoral Zone Populations
Tundra Plants
Secondary Consumers
20. Includes the community and the environment and usually all five kingdoms
Ecosystem
Hemeothermic (Warm Blooded)
Grassland Biome
Temperate Deciduous Forest Animals
21. The study of interactions between organisms and their environment
Photic Zone
Second Law of Thermodynamics
Benthos
Ecology
22. Determines water holding capacity
Grassland Animals
Substratum-texture
Osmoregulation
Desert animals
23. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Mutualims
Nitrogen Cycle 2
Intertidal Zone Population
Tropical Rain Forest Animals
24. Free-living organisms that feed on other living organisms
Predators
Primary Consumers
Aphotic Zone
Substratum (soil/rock)
25. Determined by the same decisive factors-temperatures and rainfall
Grassland Animals
Photic Zone animals
Population
Nature of Biomes
26. 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
Photic zone
Carbon Cycle 3
Biotic Community
Substratum-texture
27. 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
Substratum-Humus
Communities
Epiphytes
Food Pyramids
28. Nekton and benthos - scavengers - and predators (fiercely competitive)
Nitrogen Cycle 5
Aphotic Zone animals
Successive Communities
Parasitism
29. First to resettle a virgin area
Environmental Factors
Pioneer Organism
Aphotic Zone
Littoral Zone
30. One species may be competitively superior to the other and drive the second to extinction
Substratum-Minerals
Polar Region
Competition Same Niche
Nitrogen Cycle 3
31. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Marshes
Nitrogen Cycle 2
Omnivores
Benthos
32. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Biome
Desert animals
Tropical Rain Forest Biome
Temperate Deciduous Forest Plants
33. 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 4
Cohesive Force
Grassland Biome
Polar Region
34. Polar bears - musk oxen - and arctic hens
Aphotic Zone animals
Herbivores
Aquatic Biomes
Thundra Animals
35. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Competition Same Niche 2
Epiphytes
Intertidal Zone Population
Community
36. Animals that consume only plants or plant foods
Herbivores
Tundra Biome
Aphotic Zone
Competition
37. 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
Tundra Biome
Biotic Environment
Aphotic Zone
38. 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
Carnivores
Dentrified
Sere
Temperate Coniferous Forest Biome
39. Adaptations for maintaining their internal osmolarity and conserving water
Omnivores
Abiotic (Physical) Environment
Osmoregulation
Sere
40. Lichens and moss
Tundra Plants
Photic Zone
Pioneer Organism
Nitrogen Cycle 5
41. Integrated system of species that are dependent upon one another for survival
Polar Region
Community
Climax Community
Cohesive Force
42. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Decomposer
Climate and weather
Biotic Environment
Aphotic Zone
43. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Nitrogen cycle 1
Taiga Animals
Food Web
Substratum-texture
44. Organisms that manufacture their own food
Ecological Succession
Autotrophs
Intertidal Zone Population
Tropical Rain Forest Biome
45. Group of organisms of the same species living together in a given location
Epiphytes
Pyramid of Mass
Population
Intertidal Zone
46. Any group of similar organisms that are capable of reproducing
Decomposer
Desert animals
Species
Tropical Rain Forest Plants
47. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Tropical Rain Forest Animals
Nature of Biomes
Tropical Rain Forest Biome
Ecological Succession
48. Two fates await the ammonia (NH3). some are nitrified or dentrified
Cohesive Force
Saprophytes
Nitrogen Cycle 5
Niche
49. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Autotrophs
Parasitism
Dominant Species
Desert animals
50. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Marine Biomes
Pyramid of Energy
Cohesive Force
Polar Region