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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. 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
Aphotic Zone
Competition Same Niche 2
Dominant Species
Parasitism
2. 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
Producers
Littoral Zone
Secondary Consumers
Hypotonic
3. Deer - fox - woodchuck - and squirrel
Intraspecific Interactions
Temperate Deciduous Forest Animals
Nature of Biomes
Competition Same Niche
4. Developed long legs and many are hoofed
Climax Community
Tropical Rain Forest Animals
Grassland Animals
Substratum-Minerals
5. 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
Tropical Rain Forest Biome
Symbionts
Grassland Biome
Temperate Deciduous Forest Animals
6. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Tropical Rain Forest Animals
Producers
Marine Biomes
Nature of Biomes
7. 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
Environment
Taiga Animals
Ecology
Food Pyramids
8. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Photic zone
Physical Environment-Temperature
Desert animals
Biosphere
9. Conserve water actively
Substratum-pH
Nitrogen Cycle 5
Lithosphere
Desert Plants
10. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Environmental Factors
Osmoregulation
Taiga Animals
Tropical Rain Forest Biome
11. Determines water holding capacity
Nitrogen cycle 1
Substratum-texture
Nitrogen Cycle 2
Intertidal Zone Population
12. 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
Osmoregulation
Taiga Plants
Substratum-Humus
Second Law of Thermodynamics
13. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Climax Community
Polar Region
Predator-Prey relationship
Autotrophs
14. 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
Nitrified
Parasitism
Carbon Cycle 1
Community
15. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Herbivores
Ecology
Grassland Animals
Tropical Rain Forest Animals
16. Recycle water - oxygen - and phosphorus
Other Cycles
Biosphere
Benthos
Desert animals
17. Forest floors contain moss and lichens
Taiga Plants
Nitrified
Tertiary Consumers
Primary Consumers
18. One or both organisms can't survive without the other
Aphotic Zone animals
Obligatory
Species
Tropical Rain Forest Animals
19. Animals that feed on secondary consumer
Tertiary Consumers
Other Cycles
Abiotic (Physical) Environment
Benthos
20. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Other Cycles
Littoral Zone Populations
Dentrified
Food Chain
21. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Intertidal Zone
Taiga Plants
Temperate Coniferous Plants
Photic zone
22. Region typical of the open seas and can be divided into photic and aphotic zones
Tundra Plants
Substratum-Minerals
Pelagic Zone
Littoral Zone Populations
23. Vegetation such as vines and eppiphytes
Thundra Animals
Tropical Rain Forest Plants
Parasitism
Tropical Rain Forest Biome
24. Integrated system of species that are dependent upon one another for survival
Community
Nitrified
Predators
Pyramid of Energy
25. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Saprophytes
Niche
Autotrophs
Littoral Zone
26. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Biosphere
Marine Biomes
Secondary Consumers
Photic Zone animals
27. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Climax Community
Tertiary Consumers
Climate and weather
Producers
28. 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
Heterotrophs
Pyramid of Energy
Aphotic Zone
Commensalism
29. Rhododendrons and pines are more suited for growth in acid oil
Niche
Substratum-pH
Freshwater Biomes
Substratum-Humus
30. Free-living organisms that feed on other living organisms
Nature of Biomes
Autotrophs
Predators
Pioneer Organism
31. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Photic zone
Substratum-Humus
Nitrogen Cycle 2
Grassland Animals
32. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Hemeothermic (Warm Blooded)
Competition Same Niche
Predators
Conditions for stability in an Ecosystem
33. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Nekton
Photic Zone
Nitrogen cycle 1
Temperate Deciduous Forest Plants
34. One that exerts control over the other species that are present
Omnivores
Temperate Deciduous Forest Plants
Dominant Species
Temperate Coniferous Plants
35. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Ecological Succession
Marine Biomes
Carnivores
Competition Same Niche 3
36. 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
Carbon Cycle 3
Taiga Biome
Predator-Prey relationship
Autotrophs
37. 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
Nitrogen Cycle 3
Hydrosphere
Competition Same Niche 3
Rootlike holdfasts
38. 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
Osmoregulation
Tundra Plants
Intraspecific Interactions
Heterotrophs
39. Determined by the same decisive factors-temperatures and rainfall
Parasitism
Tropical Rain Forest Plants
Desert Plants
Nature of Biomes
40. Polar bears - musk oxen - and arctic hens
Thundra Animals
Physical Environment-Sunlight
Photic Zone
Intertidal Zone
41. Determines the nature of plant and animal life in the soil
Dominant Species
Pyramid of Numbers
Substratum (soil/rock)
Freshwater Biomes
42. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Marine Biomes
Lithosphere
Nekton
Saprophytes
43. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Epiphytes
Heterotrophs
Pioneer Organism
Climax Community
44. Animals that consume dead animals
Biosphere
Poikilothermic (Cold Blooded)
Photic zone
Scavengers
45. Animals that consume only plants or plant foods
Substratum-Minerals
Taiga Animals
Herbivores
Marine Biomes
46. 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
Population
Aquatic Biomes
Intraspecific Interactions
Temperate Deciduous Forest Biome
47. Include reproduction and protection from predators and destructive weather
Cohesive Force
Competition Same Niche 2
Hemeothermic (Warm Blooded)
Deep-sea Organisms
48. Treeless - frozen plain found between the taiga lands and the northern ice sheets - very short summer and thus a very short growing season during which time the ground becomes wet and marshy
Hydrosphere
Other Cycles
Tundra Biome
Decomposer
49. Crawling and sessile organsms
Pyramid of Numbers
Grassland Biome
Benthos
Temperate Coniferous Plants
50. Organisms that manufacture their own food
Pyramid of Mass
Conditions for stability in an Ecosystem
Autotrophs
Dominant Species