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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. 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
Tropical Rain Forest Plants
Intraspecific Interactions
Temperate Coniferous Plants
Littoral Zone Populations
2. The study of interactions between organisms and their environment
Nitrogen Cycle 3
Taiga Biome
Heterotrophs
Ecology
3. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Coimax Vegetatioin
Climax Community
Ecology
Nekton
4. When a parasite benefits at the expense of the host
Hemeothermic (Warm Blooded)
Parasitism
Substratum-texture
Carbon Cycle 2
5. Algae - crabs - crustacea - and many different species of fish
Littoral Zone Populations
Communities
Hydrosphere
Symbionts
6. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Omnivores
Community
Environmental Factors
Biome
7. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Producers
Herbivores
Biosphere
Aphotic Zone
8. The chief disruptive force
Competition
Nitrogen cycle 1
Poikilothermic (Cold Blooded)
Nitrogen
9. Symbiotic relationship from which both organisms derive some benefit
Pyramid of Numbers
Mutualims
Hemeothermic (Warm Blooded)
Predator-Prey relationship
10. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Environment
Benthos
Material Cycles
Aquatic Biomes
11. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Hemeothermic (Warm Blooded)
Mutualims
Lithosphere
Organism
12. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Physical Environment-Temperature
Tertiary Consumers
Scavengers
Taiga Animals
13. 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
Food Web
Communities
Aphotic Zone animals
Nitrogen Cycle 4
14. When one organism is benefited by the association and the other is not affected
Photic zone
Taiga Plants
Commensalism
Second Law of Thermodynamics
15. 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
Dominant Species
Temperate Coniferous Plants
Food Pyramids
Predator-Prey relationship
16. Determines water holding capacity
Nitrogen
Aquatic Biomes
Pioneer Organism
Substratum-texture
17. Cold - dry - and inhabited by fir - pine - and spruce trees -much vegetation has evolved adaptations for water conservation such as needle-shaped leaves -Extreme Northern Part of the US and in Southern Canada
Physical Environment- Water
Temperate Coniferous Forest Biome
Successive Communities
Epiphytes
18. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Marine Biomes
Epiphytes
Scavengers
Autotrophs
19. Region typical of the open seas and can be divided into photic and aphotic zones
Benthos
Pelagic Zone
Coimax Vegetatioin
Conditions for stability in an Ecosystem
20. Includes the community and the environment and usually all five kingdoms
Intraspecific Interactions
Ecosystem
Taiga Biome
Food Pyramids
21. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Niche
Dentrified
Communities
Parasitism
22. One or both organisms can't survive without the other
Mutualims
Nitrified
Deep-sea Organisms
Obligatory
23. Group of organisms of the same species living together in a given location
Herbivores
Tundra Plants
Abiotic (Physical) Environment
Population
24. 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
Biome
Food Web
Pyramid of Energy
Intraspecific Interactions
25. Freshwater Biomes vs. Saltwater 2: In rivers and streams - strong swift currents exist - and thus fish that have developed strong muscles and plants with _____________ have survived
Rootlike holdfasts
Deep-sea Organisms
Nitrogen Cycle 4
Substratum-texture
26. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Parasitism
Lithosphere
Nitrogen
Temperate Deciduous Forest Animals
27. The ultimate source of energy for all organisms
Nitrogen Cycle 5
Nitrogen cycle 1
Physical Environment-Sunlight
Aquatic Biomes
28. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Scavengers
Biosphere
Hydrosphere
Species
29. 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
Deep-sea Organisms
Carbon Cycle 2
Biotic Community
Secondary Consumers
30. Include reproduction and protection from predators and destructive weather
Producers
Intertidal Zone Population
Cohesive Force
Substratum (soil/rock)
31. Determined by the same decisive factors-temperatures and rainfall
Niche
Pyramid of Mass
Saprophytes
Nature of Biomes
32. Animals that consume primary consumers (carnivores)
Nekton
Substratum-Humus
Taiga Biome
Secondary Consumers
33. One species may be competitively superior to the other and drive the second to extinction
Nitrogen Cycle 2
Epiphytes
Competition Same Niche
Scavengers
34. Community in an ecological succession is identified by a dominant species
Substratum-pH
Temperate Deciduous Forest Biome
Sere
Lithosphere
35. 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
Tundra Biome
Intraspecific Interactions
Desert Plants
Tropical Rain Forest Animals
36. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Niche
Substratum (soil/rock)
Taiga Animals
Mutualims
37. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Heterotrophs
Predator-Prey relationship
Communities
Temperate Deciduous Forest Biome
38. 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
Aphotic Zone animals
Pyramid of Numbers
Substratum-pH
Saprophytes
39. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Community
Temperate Coniferous Forest Biome
Intertidal Zone Population
Organism
40. 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
Secondary Consumers
Species
Polar Region
41. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Pyramid of Mass
Biome
Poikilothermic (Cold Blooded)
Desert animals
42. Nekton and benthos - scavengers - and predators (fiercely competitive)
Saprophytes
Aphotic Zone animals
Secondary Consumers
Physical Environment-Temperature
43. 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
Conditions for stability in an Ecosystem
Climax Community
Aphotic Zone
Desert Biome
44. 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
Second Law of Thermodynamics
Pyramid of Numbers
Physical Environment- Water
Niche
45. 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
Physical Environment- Water
Littoral Zone Populations
Cohesive Force
Taiga Biome
46. Polar bears - musk oxen - and arctic hens
Biotic Community
Thundra Animals
Scavengers
Species
47. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Lithosphere
Temperate Coniferous Plants
Hydrosphere
Dentrified
48. Vegetation such as vines and eppiphytes
Climate and weather
Food Web
Autotrophs
Tropical Rain Forest Plants
49. Animals that consume dead animals
Commensalism
Biome
Scavengers
Communities
50. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Littoral Zone
Communities
Nekton
Physical Environment-Sunlight