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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. Forest floors contain moss and lichens
Nekton
Taiga Plants
Deep-sea Organisms
Autotrophs
2. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Benthos
Pyramid of Numbers
Hemeothermic (Warm Blooded)
Desert animals
3. 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
Temperate Coniferous Forest Biome
Littoral Zone Populations
Material Cycles
4. Encompasses all that is external to the organism and is necessary for its existence
Substratum-Humus
Coimax Vegetatioin
Environment
Producers
5. 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
Dentrified
Carnivores
Thundra Animals
Competition
6. The ultimate source of energy for all organisms
Physical Environment- Water
Substratum-pH
Physical Environment-Sunlight
Competition Same Niche 3
7. One or both organisms can't survive without the other
Ecology
Obligatory
Carbon Cycle 1
Physical Environment-Sunlight
8. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Intraspecific Interactions
Cohesive Force
Ecological Succession
Lithosphere
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
Ecology
Biotic Community
Competition
10. Adaptations for maintaining their internal osmolarity and conserving water
Osmoregulation
Ecology
Carbon Cycle 2
Nitrogen
11. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Scavengers
Temperate Deciduous Forest Plants
Material Cycles
Littoral Zone
12. The oceans
Hydrosphere
Nekton
Intraspecific Interactions
Successive Communities
13. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Intertidal Zone
Photic Zone animals
Carnivores
Aphotic Zone
14. Two fates await the ammonia (NH3). some are nitrified or dentrified
Substratum-Minerals
Nitrogen Cycle 5
Temperate Deciduous Forest Plants
Physical Environment-Temperature
15. Animals that eat both plants and animals
Omnivores
Hydrosphere
Thundra Animals
Food Pyramids
16. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Freshwater Biomes
Food Web
Desert animals
Carbon Cycle 2
17. Lichens and moss
Biome
Photic Zone animals
Food Chain
Tundra Plants
18. The major component of the internal environment of all living things
Benthos
Aphotic Zone
Niche
Physical Environment- Water
19. One that exerts control over the other species that are present
Food Web
Taiga Plants
Dominant Species
Aphotic Zone
20. Includes the community and the environment and usually all five kingdoms
Nitrogen Cycle 4
Osmoregulation
Ecosystem
Sere
21. 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
Carnivores
Hemeothermic (Warm Blooded)
Aphotic Zone
22. Includes climate - temperature - availability of light and water - and the local topology
Abiotic (Physical) Environment
Pioneer Organism
Climax Community
Carbon Cycle 1
23. Symbiotic relationship from which both organisms derive some benefit
Dentrified
Ecology
Physical Environment- Water
Mutualims
24. 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 Deciduous Forest Biome
Communities
Taiga Plants
Temperate Coniferous Forest Biome
25. The chief disruptive force
Scavengers
Competition
Littoral Zone Populations
Biosphere
26. Regiong beneatht he photic zone that receives no light
Pyramid of Energy
Taiga Animals
Carbon Cycle 3
Aphotic Zone
27. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Aphotic Zone
Symbionts
Tropical Rain Forest Plants
Food Pyramids
28. 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
Lithosphere
Heterotrophs
Pioneer Organism
29. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Predator-Prey relationship
Autotrophs
Intertidal Zone Population
Competition
30. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Predators
Dentrified
Symbionts
Photic zone
31. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Heterotrophs
Temperate Deciduous Forest Biome
Pyramid of Numbers
Niche
32. 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
Intraspecific Interactions
Coimax Vegetatioin
Photic Zone animals
Tundra Plants
33. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Food Chain
Population
Grassland Biome
Taiga Animals
34. Recycle water - oxygen - and phosphorus
Other Cycles
Mutualims
Primary Consumers
Marshes
35. Animals that consume green plants (herbivores)
Intertidal Zone Population
Physical Environment-Temperature
Nitrogen cycle 1
Primary Consumers
36. 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
Aquatic Biomes
Ecological Succession
Predator-Prey relationship
Nekton
37. Include saprophytic organisms and organisms of decay
Pyramid of Numbers
Nekton
Competition
Decomposer
38. First to resettle a virgin area
Herbivores
Temperate Deciduous Forest Animals
Desert Plants
Pioneer Organism
39. 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
Desert animals
Competition Same Niche 2
Nekton
Second Law of Thermodynamics
40. 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
Carbon Cycle 3
Competition Same Niche 3
Marshes
Autotrophs
41. 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
Climate and weather
Climax Community
Communities
Second Law of Thermodynamics
42. Nekton and benthos - scavengers - and predators (fiercely competitive)
Parasitism
Lithosphere
Aphotic Zone animals
Substratum-Humus
43. Include reproduction and protection from predators and destructive weather
Littoral Zone
Other Cycles
Marine Biomes
Cohesive Force
44. Animals that consume dead animals
Obligatory
Intertidal Zone
Scavengers
Carbon Cycle 2
45. Used to include only the population and not their physical environment
Symbionts
Biotic Community
Intertidal Zone Population
Food Web
46. Determines water holding capacity
Organism
Marshes
Substratum-texture
Saprophytes
47. 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
Freshwater Biomes
Scavengers
Tropical Rain Forest Plants
Food Pyramids
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
Substratum-Humus
Desert Plants
Symbionts
Tundra Biome
49. The nitrogen locked up in the wastes and dead tissues is released by the action of the bacteria of decay - which convert the proteins into ammonia
Nitrogen Cycle 4
Marine Biomes
Obligatory
Carbon Cycle 1
50. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Deep-sea Organisms
Commensalism
Desert Biome
Food Web