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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. 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
Saprophytes
Substratum-texture
Parasitism
Desert Plants
2. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Nitrogen
Dentrified
Communities
Abiotic (Physical) Environment
3. The study of interactions between organisms and their environment
Sere
Predators
Aphotic Zone
Ecology
4. 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
Successive Communities
Carbon Cycle 3
Environmental Factors
Ecological Succession
5. Region typical of the open seas and can be divided into photic and aphotic zones
Dentrified
Littoral Zone
Pelagic Zone
Grassland Biome
6. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Nitrogen Cycle 4
Pioneer Organism
Hemeothermic (Warm Blooded)
Coimax Vegetatioin
7. 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
Nitrogen Cycle 2
Commensalism
Littoral Zone
Temperate Coniferous Forest Biome
8. Algae - crabs - crustacea - and many different species of fish
Littoral Zone Populations
Pelagic Zone
Temperate Coniferous Plants
Substratum-texture
9. Sunlit layer of the open sea extending to a depth of 250-600ft
Temperate Coniferous Plants
Biosphere
Photic zone
Physical Environment- Water
10. 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
Dentrified
Tundra Biome
Photic Zone animals
Second Law of Thermodynamics
11. Only animal life and other heterotrophic life exists
Taiga Biome
Intertidal Zone
Aphotic Zone
Physical Environment-Sunlight
12. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Taiga Plants
Climax Community
Ecosystem
Littoral Zone Populations
13. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Pyramid of Energy
Desert Plants
Dentrified
Autotrophs
14. 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
Tertiary Consumers
Coimax Vegetatioin
Pyramid of Energy
Herbivores
15. Because organisms at the upper levels of the food chain derive their food energy from organisms at lower levels - and because energy is lost from one level to the next - each level can support a successively smaller biomass
Epiphytes
Omnivores
Aphotic Zone
Pyramid of Mass
16. The ultimate source of energy for all organisms
Hypotonic
Ecological Succession
Substratum (soil/rock)
Physical Environment-Sunlight
17. The oceans
Carbon Cycle 2
Hydrosphere
Biotic Environment
Predators
18. Polar bears - musk oxen - and arctic hens
Other Cycles
Dentrified
Thundra Animals
Substratum-Minerals
19. 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
Aphotic Zone animals
Substratum-pH
Grassland Biome
Marine Biomes
20. Animals that eat both plants and animals
Poikilothermic (Cold Blooded)
Omnivores
Temperate Deciduous Forest Biome
Nitrogen cycle 1
21. Animals eat plants and use the digested nutrients to form carbohydrates - fats - and proteins characteristic of the species. a part of these organic compounds is used as fuel in respiration in plants and animals
Ecological Succession
Carbon Cycle 2
Aphotic Zone animals
Conditions for stability in an Ecosystem
22. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Photic Zone animals
Carbon Cycle 3
Intraspecific Interactions
Pyramid of Mass
23. Animals that consume only plants or plant foods
Herbivores
Competition Same Niche 2
Nitrogen Cycle 2
Carbon Cycle 3
24. Include saprophytic organisms and organisms of decay
Grassland Animals
Freshwater Biomes
Photic Zone
Decomposer
25. 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
Substratum-Minerals
Aquatic Biomes
Intraspecific Interactions
Competition
26. Food chain is not a simple linear chain but an intricate web
Food Web
Photic Zone animals
Marshes
Photic zone
27. 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
Biosphere
Physical Environment- Water
Freshwater Biomes
Aquatic Biomes
28. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Nitrogen Cycle 5
Photic Zone animals
Pyramid of Numbers
Pioneer Organism
29. First to resettle a virgin area
Pyramid of Energy
Pioneer Organism
Nitrified
Competition Same Niche
30. Include reproduction and protection from predators and destructive weather
Aphotic Zone animals
Autotrophs
Dentrified
Cohesive Force
31. Distinct community in a geographic region
Conditions for stability in an Ecosystem
Biome
Nature of Biomes
Secondary Consumers
32. Adaptations for maintaining their internal osmolarity and conserving water
Osmoregulation
Nekton
Communities
Temperate Deciduous Forest Plants
33. Lichens and moss
Tundra Plants
Species
Physical Environment-Sunlight
Polar Region
34. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Desert animals
Epiphytes
Carbon Cycle 2
Community
35. 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
Dentrified
Niche
Substratum-Humus
Cohesive Force
36. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Tropical Rain Forest Biome
Rootlike holdfasts
Temperate Coniferous Forest Biome
Predators
37. 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
Pyramid of Mass
Carnivores
Aphotic Zone animals
Rootlike holdfasts
38. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Taiga Animals
Hypotonic
Deep-sea Organisms
Nitrogen Cycle 2
39. Group of organisms of the same species living together in a given location
Photic Zone animals
Population
Hemeothermic (Warm Blooded)
Predator-Prey relationship
40. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Polar Region
Ecosystem
Intertidal Zone Population
Marine Biomes
41. Free-living organisms that feed on other living organisms
Predators
Intraspecific Interactions
Freshwater Biomes
Other Cycles
42. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Pelagic Zone
Taiga Animals
Parasitism
Osmoregulation
43. Conserve water actively
Commensalism
Desert Plants
Coimax Vegetatioin
Aphotic Zone
44. 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
Nitrogen Cycle 5
Heterotrophs
Nitrogen Cycle 4
Competition Same Niche 2
45. Determines the nature of plant and animal life in the soil
Substratum (soil/rock)
Physical Environment- Water
Pelagic Zone
Biome
46. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Biotic Environment
Predator-Prey relationship
Physical Environment- Water
Successive Communities
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
Food Pyramids
Ecosystem
Mutualims
Conditions for stability in an Ecosystem
48. 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
Ecological Succession
Pyramid of Numbers
Carbon Cycle 2
Hypotonic
49. Community in an ecological succession is identified by a dominant species
Nekton
Physical Environment-Sunlight
Competition Same Niche 3
Sere
50. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Environmental Factors
Tundra Plants
Littoral Zone
Cohesive Force