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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. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Temperate Deciduous Forest Biome
Littoral Zone
Organism
Photic Zone animals
2. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Physical Environment-Temperature
Substratum-texture
Aphotic Zone animals
Aphotic Zone
3. One species may be competitively superior to the other and drive the second to extinction
Nature of Biomes
Tundra Biome
Competition Same Niche
Sere
4. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Intraspecific Interactions
Herbivores
Abiotic (Physical) Environment
Food Chain
5. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Second Law of Thermodynamics
Intertidal Zone
Organism
Hydrosphere
6. Group of organisms of the same species living together in a given location
Tropical Rain Forest Animals
Population
Sere
Communities
7. Community in an ecological succession is identified by a dominant species
Sere
Physical Environment-Temperature
Grassland Animals
Competition Same Niche 2
8. Include reproduction and protection from predators and destructive weather
Autotrophs
Cohesive Force
Organism
Predator-Prey relationship
9. The study of interactions between organisms and their environment
Ecology
Environment
Freshwater Biomes
Nitrogen Cycle 3
10. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Secondary Consumers
Marine Biomes
Desert animals
Tropical Rain Forest Biome
11. 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
Producers
Temperate Deciduous Forest Plants
Photic Zone
Carnivores
12. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Intertidal Zone Population
Successive Communities
Nitrogen
Biotic Community
13. Nekton and benthos - scavengers - and predators (fiercely competitive)
Nitrogen cycle 1
Aphotic Zone animals
Coimax Vegetatioin
Tropical Rain Forest Biome
14. Include saprophytic organisms and organisms of decay
Competition
Material Cycles
Tundra Biome
Decomposer
15. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Nitrogen Cycle 3
Secondary Consumers
Dominant Species
Photic zone
16. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Pyramid of Numbers
Nitrogen Cycle 5
Other Cycles
Pyramid of Energy
17. Determine by the amount of decaying plant and animal life in the soil
Substratum-Humus
Biome
Tropical Rain Forest Biome
Conditions for stability in an Ecosystem
18. Animals that consume dead animals
Carbon Cycle 1
Scavengers
Dentrified
Material Cycles
19. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Biosphere
Saprophytes
Nitrogen Cycle 4
Nekton
20. Encompasses all that is external to the organism and is necessary for its existence
Tundra Biome
Physical Environment- Water
Environment
Nitrified
21. 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
Carbon Cycle 1
Competition Same Niche
Pyramid of Energy
Carbon Cycle 3
22. 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
Pyramid of Numbers
Lithosphere
Secondary Consumers
23. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Communities
Heterotrophs
Hemeothermic (Warm Blooded)
Freshwater Biomes
24. Composed of populations that are able to exist under the new conditions
Photic Zone
Successive Communities
Climate and weather
Population
25. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Temperate Coniferous Plants
Littoral Zone Populations
Benthos
Aphotic Zone
26. 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
Physical Environment-Sunlight
Abiotic (Physical) Environment
Autotrophs
Food Pyramids
27. Any group of similar organisms that are capable of reproducing
Nekton
Species
Marshes
Photic zone
28. Used to include only the population and not their physical environment
Biotic Community
Thundra Animals
Autotrophs
Primary Consumers
29. The oceans
Niche
Heterotrophs
Hydrosphere
Secondary Consumers
30. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Hypotonic
Temperate Deciduous Forest Biome
Biome
Substratum-texture
31. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Nitrogen Cycle 2
Dominant Species
Intertidal Zone
Aphotic Zone
32. Only animal life and other heterotrophic life exists
Aquatic Biomes
Substratum-pH
Aphotic Zone
Taiga Biome
33. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Food Web
Tertiary Consumers
Desert animals
Tropical Rain Forest Biome
34. Distinct community in a geographic region
Aphotic Zone
Biome
Marshes
Benthos
35. 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
Food Pyramids
Nitrogen cycle 1
Carbon Cycle 1
Taiga Biome
36. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Competition Same Niche
Desert animals
Autotrophs
Species
37. 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
Hemeothermic (Warm Blooded)
Marine Biomes
Intraspecific Interactions
Pyramid of Mass
38. Regiong beneatht he photic zone that receives no light
Biotic Community
Niche
Substratum-pH
Aphotic Zone
39. One that exerts control over the other species that are present
Nitrogen Cycle 5
Material Cycles
Carbon Cycle 3
Dominant Species
40. 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
Taiga Plants
Symbionts
Desert Biome
Substratum-Minerals
41. Food chain is not a simple linear chain but an intricate web
Food Web
Scavengers
Food Pyramids
Saprophytes
42. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Nitrogen Cycle 2
Symbionts
Conditions for stability in an Ecosystem
Dentrified
43. Animals that consume only plants or plant foods
Herbivores
Aphotic Zone
Pioneer Organism
Heterotrophs
44. 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
Littoral Zone
Intraspecific Interactions
Biome
Carbon Cycle 2
45. Animals that consume primary consumers (carnivores)
Tropical Rain Forest Plants
Sere
Decomposer
Secondary Consumers
46. Rock and soil surface
Community
Lithosphere
Biome
Substratum-pH
47. Determined by the same decisive factors-temperatures and rainfall
Nature of Biomes
Pioneer Organism
Aquatic Biomes
Substratum-Humus
48. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Temperate Deciduous Forest Plants
Tundra Plants
Biotic Community
Photic Zone
49. Includes climate - temperature - availability of light and water - and the local topology
Abiotic (Physical) Environment
Desert animals
Organism
Nitrogen cycle 1
50. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Abiotic (Physical) Environment
Epiphytes
Physical Environment-Sunlight
Nature of Biomes