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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 exposed to low tides that undergoes variations in temperature and periods of dryness
Poikilothermic (Cold Blooded)
Intertidal Zone
Physical Environment- Water
Thundra Animals
2. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Hypotonic
Taiga Plants
Substratum-texture
Producers
3. One that exerts control over the other species that are present
Autotrophs
Niche
Material Cycles
Dominant Species
4. Affect the type of vegetation that can be supported
Predators
Competition Same Niche 3
Osmoregulation
Substratum-Minerals
5. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Heterotrophs
Osmoregulation
Hydrosphere
Physical Environment-Sunlight
6. Links between oceans and land
Cohesive Force
Scavengers
Marshes
Competition Same Niche
7. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Substratum-Minerals
Symbionts
Nekton
Climate and weather
8. 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
Temperate Coniferous Forest Biome
Benthos
Marshes
Niche
9. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Substratum-Humus
Desert animals
Epiphytes
Dominant Species
10. Community in an ecological succession is identified by a dominant species
Substratum-pH
Obligatory
Sere
Nekton
11. The vegetation that becomes dominant and stable after years of evolutiionary development
Biosphere
Coimax Vegetatioin
Material Cycles
Taiga Animals
12. One or both organisms can't survive without the other
Marshes
Obligatory
Nitrogen Cycle 4
Material Cycles
13. 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
Nitrified
Poikilothermic (Cold Blooded)
Hypotonic
14. Determines the nature of plant and animal life in the soil
Nitrogen
Organism
Substratum (soil/rock)
Parasitism
15. 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
Organism
Aphotic Zone
Niche
Biotic Community
16. Developed long legs and many are hoofed
Taiga Plants
Grassland Animals
Photic Zone animals
Niche
17. Organisms that manufacture their own food
Autotrophs
Pyramid of Mass
Environmental Factors
Intertidal Zone
18. Symbiotic relationship from which both organisms derive some benefit
Desert Plants
Omnivores
Ecology
Mutualims
19. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Intertidal Zone
Coimax Vegetatioin
Tundra Biome
Material Cycles
20. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Hemeothermic (Warm Blooded)
Benthos
Competition Same Niche 3
Temperate Coniferous Plants
21. Rivers - lakes - ponds - and marshes
Species
Communities
Coimax Vegetatioin
Freshwater Biomes
22. Region typical of the open seas and can be divided into photic and aphotic zones
Photic Zone
Pelagic Zone
Intertidal Zone
Nekton
23. Conserve water actively
Marine Biomes
Pelagic Zone
Desert Plants
Substratum-Humus
24. Include reproduction and protection from predators and destructive weather
Cohesive Force
Lithosphere
Substratum-texture
Tertiary Consumers
25. The ultimate source of energy for all organisms
Physical Environment-Sunlight
Hydrosphere
Temperate Deciduous Forest Plants
Deep-sea Organisms
26. Consists of populations of different plants and animal species interacting with each other in a given environment
Rootlike holdfasts
Epiphytes
Predators
Communities
27. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Biosphere
Desert animals
Herbivores
Niche
28. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Temperate Deciduous Forest Animals
Nekton
Environmental Factors
Community
29. Determines water holding capacity
Substratum-texture
Biotic Community
Temperate Coniferous Plants
Osmoregulation
30. One species may be competitively superior to the other and drive the second to extinction
Biome
Littoral Zone Populations
Competition Same Niche
Physical Environment-Temperature
31. 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
Nitrogen Cycle 4
Dominant Species
Environment
Aquatic Biomes
32. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Competition Same Niche 3
Conditions for stability in an Ecosystem
Nitrogen Cycle 3
Biotic Environment
33. Needs constant energy source and cycling of materials between the living system
Food Web
Conditions for stability in an Ecosystem
Commensalism
Substratum-texture
34. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Marshes
Poikilothermic (Cold Blooded)
Nitrogen Cycle 3
Grassland Animals
35. Recycle water - oxygen - and phosphorus
Epiphytes
Other Cycles
Rootlike holdfasts
Nitrogen
36. The oceans
Grassland Biome
Tundra Plants
Hydrosphere
Other Cycles
37. 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
Omnivores
Autotrophs
Saprophytes
38. 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
Tertiary Consumers
Nitrogen Cycle 3
Carnivores
Food Chain
39. 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
Desert Biome
Producers
Temperate Coniferous Forest Biome
Abiotic (Physical) Environment
40. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Nitrified
Marshes
Hemeothermic (Warm Blooded)
Tropical Rain Forest Biome
41. Vegetation such as vines and eppiphytes
Hypotonic
Aphotic Zone
Deep-sea Organisms
Tropical Rain Forest Plants
42. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Commensalism
Dominant Species
Substratum-pH
Marine Biomes
43. 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
Nekton
Carbon Cycle 3
Grassland Biome
Obligatory
44. Food chain is not a simple linear chain but an intricate web
Coimax Vegetatioin
Tropical Rain Forest Biome
Food Web
Desert animals
45. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Pioneer Organism
Tropical Rain Forest Animals
Substratum (soil/rock)
Nitrogen Cycle 5
46. 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
Pelagic Zone
Aphotic Zone
Cohesive Force
Carbon Cycle 3
47. Adaptations for maintaining their internal osmolarity and conserving water
Freshwater Biomes
Intraspecific Interactions
Photic Zone animals
Osmoregulation
48. Encompasses all that is external to the organism and is necessary for its existence
Substratum (soil/rock)
Carbon Cycle 1
Pelagic Zone
Environment
49. Includes the community and the environment and usually all five kingdoms
Ecosystem
Coimax Vegetatioin
Community
Commensalism
50. Distinct community in a geographic region
Tundra Biome
Biome
Second Law of Thermodynamics
Temperate Coniferous Plants