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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. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Pyramid of Numbers
Taiga Biome
Food Chain
Substratum-pH
2. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Nature of Biomes
Grassland Animals
Temperate Coniferous Plants
Substratum (soil/rock)
3. Regiong beneatht he photic zone that receives no light
Biome
Community
Abiotic (Physical) Environment
Aphotic Zone
4. 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
Hemeothermic (Warm Blooded)
Grassland Biome
Taiga Plants
Second Law of Thermodynamics
5. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Carbon Cycle 3
Littoral Zone Populations
Tropical Rain Forest Biome
Nitrified
6. Animals that eat both plants and animals
Organism
Cohesive Force
Ecosystem
Omnivores
7. Animals that consume green plants (herbivores)
Carnivores
Intertidal Zone Population
Substratum-Minerals
Primary Consumers
8. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Nitrogen Cycle 2
Nitrogen
Ecological Succession
Mutualims
9. 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
Carbon Cycle 1
Freshwater Biomes
Biome
Taiga Animals
10. Distinct community in a geographic region
Nitrified
Nitrogen cycle 1
Biome
Successive Communities
11. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Temperate Coniferous Forest Biome
Nitrogen
Deep-sea Organisms
Primary Consumers
12. Recycle water - oxygen - and phosphorus
Other Cycles
Tundra Plants
Saprophytes
Deep-sea Organisms
13. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Substratum-texture
Nitrogen
Carbon Cycle 3
Abiotic (Physical) Environment
14. 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
Nitrogen Cycle 3
Omnivores
Tundra Biome
Tropical Rain Forest Animals
15. One species may be competitively superior to the other and drive the second to extinction
Tropical Rain Forest Biome
Aphotic Zone animals
Competition Same Niche
Nitrogen Cycle 4
16. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Temperate Deciduous Forest Biome
Second Law of Thermodynamics
Decomposer
Hydrosphere
17. 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
Organism
Substratum-pH
Biotic Environment
Pyramid of Energy
18. Integrated system of species that are dependent upon one another for survival
Community
Nekton
Temperate Coniferous Plants
Physical Environment-Sunlight
19. One or both organisms can't survive without the other
Temperate Deciduous Forest Biome
Obligatory
Scavengers
Temperate Coniferous Plants
20. Determines water holding capacity
Conditions for stability in an Ecosystem
Competition Same Niche 2
Substratum-texture
Marine Biomes
21. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Intertidal Zone
Climate and weather
Carbon Cycle 1
Nitrogen cycle 1
22. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Predator-Prey relationship
Temperate Coniferous Plants
Secondary Consumers
Biosphere
23. 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
Pelagic Zone
Hypotonic
Omnivores
Competition Same Niche 3
24. 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
Physical Environment-Sunlight
Grassland Biome
Carbon Cycle 3
Rootlike holdfasts
25. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Herbivores
Temperate Coniferous Forest Biome
Heterotrophs
Intertidal Zone Population
26. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Carbon Cycle 3
Biosphere
Climate and weather
Primary Consumers
27. Deer - fox - woodchuck - and squirrel
Carbon Cycle 3
Temperate Deciduous Forest Animals
Ecosystem
Competition Same Niche 2
28. When one organism is benefited by the association and the other is not affected
Aquatic Biomes
Taiga Plants
Commensalism
Environment
29. 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
Photic Zone
Rootlike holdfasts
Other Cycles
Desert Biome
30. Used to include only the population and not their physical environment
Nitrogen Cycle 3
Thundra Animals
Hemeothermic (Warm Blooded)
Biotic Community
31. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Successive Communities
Nitrified
Littoral Zone
Physical Environment-Sunlight
32. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Physical Environment-Sunlight
Intraspecific Interactions
Heterotrophs
Ecological Succession
33. Sunlit layer of the open sea extending to a depth of 250-600ft
Photic zone
Temperate Deciduous Forest Biome
Conditions for stability in an Ecosystem
Competition Same Niche 3
34. Determines the nature of plant and animal life in the soil
Organism
Taiga Plants
Predators
Substratum (soil/rock)
35. Encompasses all that is external to the organism and is necessary for its existence
Nitrogen cycle 1
Taiga Plants
Pyramid of Energy
Environment
36. Adaptations for maintaining their internal osmolarity and conserving water
Carbon Cycle 3
Biome
Environmental Factors
Osmoregulation
37. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Mutualims
Intraspecific Interactions
Decomposer
Taiga Animals
38. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Scavengers
Community
Aquatic Biomes
Food Chain
39. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Substratum-Humus
Freshwater Biomes
Organism
Species
40. The vegetation that becomes dominant and stable after years of evolutiionary development
Aphotic Zone
Aquatic Biomes
Conditions for stability in an Ecosystem
Coimax Vegetatioin
41. Animals that consume dead animals
Predators
Symbionts
Substratum (soil/rock)
Scavengers
42. 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
Food Chain
Competition Same Niche 2
Omnivores
Intraspecific Interactions
43. 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
Lithosphere
Substratum-texture
Pyramid of Numbers
44. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Autotrophs
Biotic Environment
Freshwater Biomes
Nitrogen Cycle 3
45. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Biotic Environment
Physical Environment- Water
Competition Same Niche 3
Climax Community
46. Includes the community and the environment and usually all five kingdoms
Physical Environment-Temperature
Ecosystem
Food Pyramids
Biotic Environment
47. 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
Tundra Plants
Secondary Consumers
Saprophytes
Aphotic Zone
48. 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
Food Pyramids
Material Cycles
Desert Plants
49. 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
Competition Same Niche 3
Photic Zone animals
Autotrophs
Taiga Animals
50. 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
Secondary Consumers
Nature of Biomes
Coimax Vegetatioin
Carnivores