SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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. 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
Benthos
Temperate Coniferous Forest Biome
Food Chain
Competition Same Niche 2
2. Needs constant energy source and cycling of materials between the living system
Pioneer Organism
Conditions for stability in an Ecosystem
Substratum (soil/rock)
Mutualims
3. 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
Aphotic Zone animals
Scavengers
Pyramid of Energy
Physical Environment-Sunlight
4. One that exerts control over the other species that are present
Food Chain
Dominant Species
Abiotic (Physical) Environment
Tundra Biome
5. Polar bears - musk oxen - and arctic hens
Thundra Animals
Poikilothermic (Cold Blooded)
Producers
Temperate Coniferous Plants
6. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Pioneer Organism
Desert Plants
Successive Communities
Ecological Succession
7. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Carbon Cycle 2
Scavengers
Predator-Prey relationship
Pioneer Organism
8. Region typical of the open seas and can be divided into photic and aphotic zones
Nitrogen Cycle 3
Pelagic Zone
Parasitism
Taiga Animals
9. 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
Food Pyramids
Environment
Second Law of Thermodynamics
Omnivores
10. The oceans
Hydrosphere
Competition Same Niche
Second Law of Thermodynamics
Intraspecific Interactions
11. Only animal life and other heterotrophic life exists
Photic Zone
Biosphere
Aphotic Zone
Population
12. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Heterotrophs
Desert Plants
Intertidal Zone Population
Nature of Biomes
13. Elemental nitrogen is chemically inert and cannot be used by most organisms. Lightning and nitrogen-fixing bacteria in the roots of legumes change the nitrogen into the usable - soluble nitrates
Nitrogen cycle 1
Predators
Thundra Animals
Substratum-Humus
14. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Heterotrophs
Thundra Animals
Temperate Deciduous Forest Biome
Niche
15. The major component of the internal environment of all living things
Biosphere
Physical Environment- Water
Nitrogen cycle 1
Intraspecific Interactions
16. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Scavengers
Competition Same Niche 2
Nitrified
Decomposer
17. Symbiotic relationship from which both organisms derive some benefit
Intertidal Zone
Aphotic Zone
Mutualims
Grassland Biome
18. 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
Desert Plants
Substratum-Humus
Pioneer Organism
Intraspecific Interactions
19. 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
Successive Communities
Conditions for stability in an Ecosystem
Obligatory
20. 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
Pioneer Organism
Herbivores
Aphotic Zone animals
Saprophytes
21. The ultimate source of energy for all organisms
Physical Environment-Sunlight
Desert Plants
Poikilothermic (Cold Blooded)
Substratum-Humus
22. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Thundra Animals
Saprophytes
Food Chain
Pioneer Organism
23. 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
Ecological Succession
Biotic Community
Herbivores
24. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Competition Same Niche
Material Cycles
Competition Same Niche 3
Hemeothermic (Warm Blooded)
25. Determined by the same decisive factors-temperatures and rainfall
Nature of Biomes
Commensalism
Taiga Plants
Material Cycles
26. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Freshwater Biomes
Predators
Tropical Rain Forest Biome
Predator-Prey relationship
27. 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
Taiga Biome
Dentrified
Dominant Species
28. Determine by the amount of decaying plant and animal life in the soil
Population
Biome
Nitrogen
Substratum-Humus
29. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Biotic Community
Climax Community
Substratum-pH
Parasitism
30. Animals that feed on secondary consumer
Environment
Organism
Temperate Deciduous Forest Animals
Tertiary Consumers
31. One species may be competitively superior to the other and drive the second to extinction
Desert Biome
Nitrified
Desert animals
Competition Same Niche
32. Gaseous CO2 enters the living world when plants use it to produce glucose via photosynthesis. The carbon atoms in CO2 are bonded to hydrogen and other carbon atoms. the plant uses the glucose to make starch - proteins - and fat
Carbon Cycle 1
Temperate Coniferous Plants
Hypotonic
Temperate Coniferous Forest Biome
33. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Desert animals
Nitrogen Cycle 3
Competition Same Niche 2
Decomposer
34. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Ecological Succession
Littoral Zone Populations
Nitrogen
Poikilothermic (Cold Blooded)
35. 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-Humus
Littoral Zone
Second Law of Thermodynamics
Hemeothermic (Warm Blooded)
36. Used to include only the population and not their physical environment
Biotic Community
Grassland Biome
Desert Biome
Producers
37. Animals that consume green plants (herbivores)
Tundra Plants
Competition Same Niche 2
Desert Plants
Primary Consumers
38. Rivers - lakes - ponds - and marshes
Nitrogen Cycle 2
Tundra Biome
Freshwater Biomes
Nitrogen Cycle 3
39. 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
Environmental Factors
Rootlike holdfasts
Other Cycles
Niche
40. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Food Pyramids
Photic Zone
Temperate Coniferous Forest Biome
Hypotonic
41. Integrated system of species that are dependent upon one another for survival
Tropical Rain Forest Biome
Competition
Community
Tundra Biome
42. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Epiphytes
Other Cycles
Competition Same Niche 2
Marshes
43. Composed of populations that are able to exist under the new conditions
Hydrosphere
Thundra Animals
Littoral Zone Populations
Successive Communities
44. Determines water holding capacity
Saprophytes
Thundra Animals
Epiphytes
Substratum-texture
45. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Tropical Rain Forest Animals
Autotrophs
Temperate Deciduous Forest Biome
Grassland Biome
46. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Competition Same Niche 3
Cohesive Force
Symbionts
Physical Environment-Temperature
47. Organisms that manufacture their own food
Autotrophs
Tropical Rain Forest Plants
Saprophytes
Species
48. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Pioneer Organism
Cohesive Force
Organism
Pelagic Zone
49. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Food Web
Marine Biomes
Tundra Plants
Substratum-texture
50. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Nitrogen Cycle 5
Producers
Coimax Vegetatioin
Decomposer