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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. 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
Aphotic Zone
Temperate Deciduous Forest Biome
Tropical Rain Forest Animals
2. Algae - crabs - crustacea - and many different species of fish
Successive Communities
Littoral Zone Populations
Biotic Environment
Sere
3. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Physical Environment- Water
Taiga Animals
Intertidal Zone Population
Littoral Zone
4. One that exerts control over the other species that are present
Carnivores
Food Chain
Producers
Dominant Species
5. One or both organisms can't survive without the other
Aphotic Zone
Dominant Species
Physical Environment- Water
Obligatory
6. Group of organisms of the same species living together in a given location
Food Pyramids
Temperate Deciduous Forest Plants
Population
Rootlike holdfasts
7. 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
Competition
Autotrophs
Obligatory
Intraspecific Interactions
8. The major component of the internal environment of all living things
Physical Environment- Water
Niche
Littoral Zone
Climax Community
9. Any group of similar organisms that are capable of reproducing
Nitrogen
Species
Pyramid of Mass
Organism
10. Nekton and benthos - scavengers - and predators (fiercely competitive)
Aphotic Zone animals
Pioneer Organism
Temperate Coniferous Plants
Competition Same Niche 3
11. Recycle water - oxygen - and phosphorus
Tropical Rain Forest Biome
Photic zone
Desert animals
Other Cycles
12. 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
Littoral Zone Populations
Aquatic Biomes
Hypotonic
Tropical Rain Forest Biome
13. 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 2
Heterotrophs
Competition Same Niche 2
Aphotic Zone animals
14. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Rootlike holdfasts
Commensalism
Coimax Vegetatioin
Deep-sea Organisms
15. 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
Tropical Rain Forest Plants
Competition Same Niche 3
Predator-Prey relationship
Tundra Biome
16. The chief disruptive force
Tropical Rain Forest Plants
Competition
Commensalism
Rootlike holdfasts
17. Deer - fox - woodchuck - and squirrel
Marshes
Pelagic Zone
Temperate Deciduous Forest Animals
Taiga Plants
18. When one organism is benefited by the association and the other is not affected
Littoral Zone Populations
Commensalism
Ecological Succession
Predators
19. Animals that consume primary consumers (carnivores)
Primary Consumers
Littoral Zone
Secondary Consumers
Tropical Rain Forest Animals
20. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Food Pyramids
Photic Zone
Competition
Environmental Factors
21. Used to include only the population and not their physical environment
Ecology
Saprophytes
Lithosphere
Biotic Community
22. Determines the nature of plant and animal life in the soil
Substratum (soil/rock)
Omnivores
Rootlike holdfasts
Competition Same Niche
23. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Predators
Substratum-Minerals
Substratum-pH
Biosphere
24. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Cohesive Force
Aquatic Biomes
Intertidal Zone
Taiga Plants
25. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Freshwater Biomes
Autotrophs
Biotic Environment
Herbivores
26. 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
Hydrosphere
Saprophytes
Carbon Cycle 3
Competition Same Niche 3
27. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Tropical Rain Forest Plants
Tropical Rain Forest Biome
Material Cycles
Saprophytes
28. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Abiotic (Physical) Environment
Tertiary Consumers
Temperate Deciduous Forest Biome
Nitrogen Cycle 2
29. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Biome
Environmental Factors
Dentrified
Desert Biome
30. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Species
Osmoregulation
Climax Community
Heterotrophs
31. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Pelagic Zone
Temperate Coniferous Plants
Producers
Herbivores
32. When a parasite benefits at the expense of the host
Photic Zone animals
Parasitism
Biome
Grassland Animals
33. Organisms that manufacture their own food
Temperate Deciduous Forest Plants
Nitrogen
Food Pyramids
Autotrophs
34. Free-living organisms that feed on other living organisms
Symbionts
Biome
Predator-Prey relationship
Predators
35. Conserve water actively
Carbon Cycle 2
Tertiary Consumers
Desert Plants
Heterotrophs
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
Marine Biomes
Littoral Zone Populations
Second Law of Thermodynamics
Taiga Biome
37. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Freshwater Biomes
Physical Environment- Water
Organism
Taiga Animals
38. Food chain is not a simple linear chain but an intricate web
Tropical Rain Forest Biome
Biotic Environment
Food Web
Intertidal Zone Population
39. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Other Cycles
Aphotic Zone animals
Climax Community
Pioneer Organism
40. 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
Autotrophs
Nitrogen Cycle 2
Communities
Grassland Biome
41. Only animal life and other heterotrophic life exists
Communities
Aphotic Zone
Pioneer Organism
Rootlike holdfasts
42. 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
Nitrogen Cycle 2
Nitrogen Cycle 5
Carnivores
Hemeothermic (Warm Blooded)
43. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Ecological Succession
Benthos
Herbivores
Rootlike holdfasts
44. The ultimate source of energy for all organisms
Predators
Climax Community
Physical Environment-Sunlight
Grassland Biome
45. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Nitrogen Cycle 3
Predators
Littoral Zone
Predator-Prey relationship
46. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Predators
Desert Plants
Material Cycles
Tropical Rain Forest Plants
47. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Temperate Coniferous Forest Biome
Deep-sea Organisms
Intertidal Zone
Poikilothermic (Cold Blooded)
48. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Poikilothermic (Cold Blooded)
Material Cycles
Nitrogen
Omnivores
49. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Omnivores
Temperate Deciduous Forest Plants
Temperate Coniferous Plants
Autotrophs
50. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Primary Consumers
Biome
Hemeothermic (Warm Blooded)
Carbon Cycle 1