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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. Only animal life and other heterotrophic life exists
Marshes
Photic Zone
Aphotic Zone
Mutualims
2. First to resettle a virgin area
Taiga Plants
Pioneer Organism
Substratum-texture
Epiphytes
3. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Grassland Animals
Carnivores
Other Cycles
Nitrogen Cycle 2
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
Hypotonic
Physical Environment- Water
Tundra Biome
Substratum-Humus
5. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Pyramid of Numbers
Organism
Desert Plants
Heterotrophs
6. The study of interactions between organisms and their environment
Nature of Biomes
Ecology
Niche
Successive Communities
7. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Biotic Environment
Communities
Littoral Zone Populations
Coimax Vegetatioin
8. Deer - fox - woodchuck - and squirrel
Temperate Deciduous Forest Animals
Tertiary Consumers
Marshes
Environment
9. The oceans
Carbon Cycle 2
Substratum (soil/rock)
Nitrogen Cycle 4
Hydrosphere
10. Used to include only the population and not their physical environment
Tundra Biome
Biotic Community
Temperate Deciduous Forest Animals
Climate and weather
11. 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
Organism
Physical Environment-Sunlight
Tundra Plants
Rootlike holdfasts
12. Animals that consume primary consumers (carnivores)
Tropical Rain Forest Biome
Secondary Consumers
Environmental Factors
Dentrified
13. More than 70% of earth -plants have little controlling influence in communities -most stable ecosystems; the conditions affecting temperature - amount of available oxygen and cabon dioxide - and amount of suspended or dissolve materials are very stab
Photic Zone
Physical Environment-Sunlight
Aquatic Biomes
Climax Community
14. Recycle water - oxygen - and phosphorus
Other Cycles
Material Cycles
Photic Zone
Intraspecific Interactions
15. Food chain is not a simple linear chain but an intricate web
Intertidal Zone
Environment
Food Web
Desert animals
16. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Nekton
Organism
Grassland Animals
Aquatic Biomes
17. Affect the type of vegetation that can be supported
Food Pyramids
Substratum-Minerals
Nature of Biomes
Species
18. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Competition Same Niche 2
Decomposer
Epiphytes
Intraspecific Interactions
19. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Temperate Deciduous Forest Animals
Photic Zone animals
Nitrogen Cycle 3
Intraspecific Interactions
20. Symbiotic relationship from which both organisms derive some benefit
Mutualims
Nitrogen cycle 1
Taiga Animals
Biotic Community
21. When a parasite benefits at the expense of the host
Parasitism
Environmental Factors
Nitrogen Cycle 2
Abiotic (Physical) Environment
22. 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
Carnivores
Aphotic Zone animals
Nitrogen cycle 1
Sere
23. Regiong beneatht he photic zone that receives no light
Predators
Nitrogen
Carbon Cycle 2
Aphotic Zone
24. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Ecological Succession
Hemeothermic (Warm Blooded)
Photic Zone
Substratum-Minerals
25. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Biotic Community
Poikilothermic (Cold Blooded)
Temperate Deciduous Forest Animals
Nitrogen Cycle 5
26. Organisms that manufacture their own food
Pyramid of Numbers
Obligatory
Pyramid of Energy
Autotrophs
27. When one organism is benefited by the association and the other is not affected
Freshwater Biomes
Pioneer Organism
Substratum-Minerals
Commensalism
28. Consists of populations of different plants and animal species interacting with each other in a given environment
Communities
Dominant Species
Commensalism
Intertidal Zone Population
29. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Hemeothermic (Warm Blooded)
Pyramid of Numbers
Material Cycles
Predators
30. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Pioneer Organism
Heterotrophs
Temperate Coniferous Forest Biome
Population
31. Sunlit layer of the open sea extending to a depth of 250-600ft
Freshwater Biomes
Second Law of Thermodynamics
Nekton
Photic zone
32. Determines water holding capacity
Primary Consumers
Benthos
Substratum-texture
Aquatic Biomes
33. Integrated system of species that are dependent upon one another for survival
Hypotonic
Ecological Succession
Herbivores
Community
34. 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
Substratum-Minerals
Nitrogen Cycle 3
Intertidal Zone Population
Temperate Coniferous Forest Biome
35. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Benthos
Tropical Rain Forest Biome
Marshes
Pelagic Zone
36. Freshwater Biomes vs. Saltwater 3: Freshwater biomes - except very large lakes - are affected by variations in _________. temperature of freshwater bodies varies considerably; they may freeze or dry up - and mud from their floors may be stirred up by
Herbivores
Climate and weather
Temperate Coniferous Forest Biome
Carbon Cycle 1
37. Include reproduction and protection from predators and destructive weather
Intertidal Zone Population
Material Cycles
Carbon Cycle 3
Cohesive Force
38. 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
Decomposer
Hypotonic
Competition Same Niche 3
Ecology
39. Nekton and benthos - scavengers - and predators (fiercely competitive)
Conditions for stability in an Ecosystem
Aphotic Zone animals
Desert Plants
Nitrogen Cycle 2
40. 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
Tertiary Consumers
Climate and weather
Tundra Plants
41. One that exerts control over the other species that are present
Intertidal Zone Population
Biome
Dominant Species
Pelagic Zone
42. Encompasses all that is external to the organism and is necessary for its existence
Environment
Aphotic Zone
Marine Biomes
Tropical Rain Forest Plants
43. Distinct community in a geographic region
Substratum-pH
Biome
Carbon Cycle 2
Nitrogen
44. 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
Nitrogen Cycle 3
Food Chain
Carbon Cycle 1
Littoral Zone
45. Region typical of the open seas and can be divided into photic and aphotic zones
Hydrosphere
Substratum (soil/rock)
Pelagic Zone
Tertiary Consumers
46. 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
Ecological Succession
Grassland Biome
Nitrogen Cycle 2
Competition
47. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Temperate Deciduous Forest Animals
Intertidal Zone Population
Aphotic Zone
Temperate Deciduous Forest Biome
48. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Dentrified
Substratum-Minerals
Niche
Environmental Factors
49. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Aquatic Biomes
Tropical Rain Forest Animals
Ecology
Tropical Rain Forest Biome
50. Needs constant energy source and cycling of materials between the living system
Conditions for stability in an Ecosystem
Symbionts
Autotrophs
Competition Same Niche 3