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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. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Epiphytes
Environment
Poikilothermic (Cold Blooded)
Material Cycles
2. Consists of populations of different plants and animal species interacting with each other in a given environment
Communities
Decomposer
Marine Biomes
Substratum-texture
3. Forest floors contain moss and lichens
Nitrogen Cycle 3
Pyramid of Energy
Taiga Plants
Competition
4. 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
Taiga Animals
Intertidal Zone Population
Littoral Zone
5. Animals that eat both plants and animals
Pioneer Organism
Carnivores
Tertiary Consumers
Omnivores
6. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Omnivores
Predators
Desert animals
Hemeothermic (Warm Blooded)
7. Algae - crabs - crustacea - and many different species of fish
Herbivores
Hemeothermic (Warm Blooded)
Competition
Littoral Zone Populations
8. Rivers - lakes - ponds - and marshes
Hypotonic
Ecosystem
Decomposer
Freshwater Biomes
9. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Biotic Environment
Physical Environment-Sunlight
Photic Zone animals
Nitrogen Cycle 2
10. Includes climate - temperature - availability of light and water - and the local topology
Abiotic (Physical) Environment
Food Chain
Tropical Rain Forest Biome
Substratum-pH
11. Nekton and benthos - scavengers - and predators (fiercely competitive)
Sere
Dominant Species
Aphotic Zone animals
Competition Same Niche 3
12. Deer - fox - woodchuck - and squirrel
Biotic Environment
Temperate Deciduous Forest Animals
Decomposer
Competition
13. Encompasses all that is external to the organism and is necessary for its existence
Environment
Carbon Cycle 1
Physical Environment-Sunlight
Temperate Coniferous Plants
14. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Aphotic Zone animals
Secondary Consumers
Organism
Aquatic Biomes
15. Conserve water actively
Material Cycles
Desert Plants
Population
Hypotonic
16. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Temperate Deciduous Forest Plants
Photic zone
Rootlike holdfasts
Nitrified
17. 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
Population
Marine Biomes
Scavengers
18. Region typical of the open seas and can be divided into photic and aphotic zones
Pelagic Zone
Physical Environment-Temperature
Physical Environment- Water
Other Cycles
19. The study of interactions between organisms and their environment
Photic Zone animals
Ecology
Climax Community
Successive Communities
20. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Parasitism
Polar Region
Tundra Plants
Nitrogen
21. The oceans
Tropical Rain Forest Biome
Hydrosphere
Carbon Cycle 3
Abiotic (Physical) Environment
22. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Intertidal Zone
Hydrosphere
Photic Zone animals
Littoral Zone Populations
23. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Marine Biomes
Population
Predator-Prey relationship
Successive Communities
24. Lichens and moss
Tundra Plants
Tropical Rain Forest Plants
Physical Environment-Temperature
Mutualims
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
Nitrogen Cycle 4
Pyramid of Mass
Substratum-Minerals
Hydrosphere
26. 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
Epiphytes
Obligatory
Temperate Deciduous Forest Animals
Taiga Biome
27. 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
Carbon Cycle 3
Pyramid of Numbers
Intraspecific Interactions
Hypotonic
28. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Niche
Pelagic Zone
Osmoregulation
29. Polar bears - musk oxen - and arctic hens
Epiphytes
Polar Region
Thundra Animals
Communities
30. Affect the type of vegetation that can be supported
Temperate Deciduous Forest Biome
Physical Environment- Water
Carbon Cycle 2
Substratum-Minerals
31. 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
Freshwater Biomes
Substratum-texture
Grassland Biome
32. 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
Successive Communities
Carbon Cycle 2
Thundra Animals
Benthos
33. One species may be competitively superior in some regions - and the other may be superior in other regions under different environmental conditions. this would result in the elimination of one species in some places and the other in other places
Competition Same Niche 2
Competition Same Niche 3
Nitrogen Cycle 4
Benthos
34. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Carbon Cycle 2
Biosphere
Symbionts
Pyramid of Mass
35. 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
Carbon Cycle 1
Intraspecific Interactions
Decomposer
Biosphere
36. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Sere
Ecology
Food Web
Nekton
37. Defines the functional role of an organism in its ecosystem -described what the organism eats - where and how it obtains its food - what climatic factors it can tolerate and which are optimal - the nature of its parasites and predators - where and ho
Autotrophs
Tundra Plants
Competition Same Niche 3
Niche
38. Used to include only the population and not their physical environment
Aphotic Zone animals
Hydrosphere
Littoral Zone Populations
Biotic Community
39. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Food Web
Pelagic Zone
Deep-sea Organisms
Material Cycles
40. Any group of similar organisms that are capable of reproducing
Temperate Coniferous Forest Biome
Poikilothermic (Cold Blooded)
Littoral Zone Populations
Species
41. Recycle water - oxygen - and phosphorus
Parasitism
Predators
Other Cycles
Taiga Animals
42. Group of organisms of the same species living together in a given location
Ecosystem
Littoral Zone Populations
Material Cycles
Population
43. First to resettle a virgin area
Population
Substratum-Minerals
Substratum-Humus
Pioneer Organism
44. 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
Autotrophs
Pyramid of Energy
Organism
Desert Plants
45. Determines water holding capacity
Substratum-texture
Taiga Animals
Polar Region
Pyramid of Energy
46. Organisms that manufacture their own food
Environmental Factors
Autotrophs
Secondary Consumers
Abiotic (Physical) Environment
47. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Poikilothermic (Cold Blooded)
Rootlike holdfasts
Nitrogen Cycle 3
Nitrogen Cycle 5
48. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Sere
Niche
Tropical Rain Forest Biome
Scavengers
49. 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
Aquatic Biomes
Hypotonic
Material Cycles
Photic Zone animals
50. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Epiphytes
Pyramid of Mass
Competition
Substratum-pH