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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. Animals that eat both plants and animals
Pioneer Organism
Saprophytes
Omnivores
Nitrogen cycle 1
2. 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
Hemeothermic (Warm Blooded)
Pyramid of Energy
Carbon Cycle 3
Intertidal Zone
3. Deer - fox - woodchuck - and squirrel
Physical Environment-Temperature
Polar Region
Deep-sea Organisms
Temperate Deciduous Forest Animals
4. Includes the community and the environment and usually all five kingdoms
Lithosphere
Ecosystem
Aquatic Biomes
Intertidal Zone
5. Crawling and sessile organsms
Competition
Biome
Abiotic (Physical) Environment
Benthos
6. Recycle water - oxygen - and phosphorus
Intertidal Zone Population
Epiphytes
Tropical Rain Forest Animals
Other Cycles
7. When a parasite benefits at the expense of the host
Sere
Substratum-texture
Secondary Consumers
Parasitism
8. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Nitrogen
Tundra Plants
Abiotic (Physical) Environment
Coimax Vegetatioin
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
Nitrogen Cycle 2
Grassland Animals
Material Cycles
10. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Tropical Rain Forest Plants
Physical Environment-Temperature
Temperate Deciduous Forest Plants
Food Chain
11. Adaptations for maintaining their internal osmolarity and conserving water
Littoral Zone Populations
Pyramid of Energy
Osmoregulation
Scavengers
12. 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
Mutualims
Physical Environment-Sunlight
Grassland Biome
Pyramid of Numbers
13. Organisms that manufacture their own food
Autotrophs
Omnivores
Biome
Temperate Coniferous Plants
14. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Herbivores
Desert Biome
Competition Same Niche 2
Poikilothermic (Cold Blooded)
15. One or both organisms can't survive without the other
Obligatory
Herbivores
Hypotonic
Autotrophs
16. Regiong beneatht he photic zone that receives no light
Nekton
Secondary Consumers
Aphotic Zone
Epiphytes
17. Include reproduction and protection from predators and destructive weather
Organism
Carbon Cycle 3
Cohesive Force
Competition Same Niche
18. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Physical Environment-Temperature
Tundra Biome
Carbon Cycle 2
Poikilothermic (Cold Blooded)
19. 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
Lithosphere
Substratum-Humus
Tropical Rain Forest Animals
Hypotonic
20. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Freshwater Biomes
Intertidal Zone Population
Symbionts
Pelagic Zone
21. 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
Thundra Animals
Polar Region
Nitrogen Cycle 4
Substratum (soil/rock)
22. The study of interactions between organisms and their environment
Parasitism
Ecology
Nitrogen cycle 1
Environment
23. 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
Successive Communities
Nature of Biomes
Obligatory
Tundra Biome
24. Links between oceans and land
Intertidal Zone Population
Marshes
Aphotic Zone
Physical Environment-Temperature
25. The chief disruptive force
Physical Environment- Water
Competition
Pelagic Zone
Aquatic Biomes
26. 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
Substratum-Minerals
Scavengers
Poikilothermic (Cold Blooded)
Rootlike holdfasts
27. Region typical of the open seas and can be divided into photic and aphotic zones
Pelagic Zone
Food Chain
Intertidal Zone Population
Nitrogen Cycle 5
28. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Photic Zone animals
Carbon Cycle 2
Climate and weather
Grassland Animals
29. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Epiphytes
Nitrogen Cycle 2
Decomposer
Dentrified
30. 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
Competition Same Niche 2
Nekton
Taiga Biome
Marine Biomes
31. Any group of similar organisms that are capable of reproducing
Desert Plants
Species
Hemeothermic (Warm Blooded)
Nitrogen Cycle 5
32. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Littoral Zone Populations
Biotic Environment
Marshes
Intertidal Zone Population
33. Developed long legs and many are hoofed
Climax Community
Grassland Animals
Conditions for stability in an Ecosystem
Substratum (soil/rock)
34. Group of organisms of the same species living together in a given location
Coimax Vegetatioin
Marshes
Benthos
Population
35. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Community
Tropical Rain Forest Animals
Marine Biomes
Aphotic Zone
36. One species may be competitively superior to the other and drive the second to extinction
Herbivores
Littoral Zone Populations
Competition Same Niche
Temperate Deciduous Forest Animals
37. Distinct community in a geographic region
Species
Photic zone
Biome
Carbon Cycle 1
38. 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
Environment
Dominant Species
Carbon Cycle 3
Climax Community
39. 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
Environmental Factors
Temperate Deciduous Forest Plants
Food Chain
Temperate Coniferous Forest Biome
40. Animals that consume only plants or plant foods
Coimax Vegetatioin
Herbivores
Temperate Deciduous Forest Biome
Epiphytes
41. Community in an ecological succession is identified by a dominant species
Osmoregulation
Sere
Successive Communities
Nitrogen Cycle 5
42. Rivers - lakes - ponds - and marshes
Autotrophs
Omnivores
Second Law of Thermodynamics
Freshwater Biomes
43. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Pyramid of Numbers
Photic zone
Biosphere
Ecological Succession
44. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Taiga Plants
Hemeothermic (Warm Blooded)
Tertiary Consumers
Photic zone
45. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Competition Same Niche
Autotrophs
Biosphere
Tertiary Consumers
46. 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
Pelagic Zone
Competition Same Niche 3
Scavengers
Aphotic Zone animals
47. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Climax Community
Taiga Biome
Tropical Rain Forest Biome
Predator-Prey relationship
48. The ultimate source of energy for all organisms
Sere
Material Cycles
Physical Environment-Sunlight
Marine Biomes
49. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Communities
Other Cycles
Biotic Community
50. The oceans
Hydrosphere
Commensalism
Physical Environment-Temperature
Substratum-Minerals