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Test your basic knowledge |
PCAT Biology Ecology
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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. Encompasses all that is external to the organism and is necessary for its existence
Competition Same Niche 3
Heterotrophs
Environment
Temperate Coniferous Forest Biome
2. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Scavengers
Environmental Factors
Taiga Plants
Environment
3. Determines the nature of plant and animal life in the soil
Substratum (soil/rock)
Temperate Deciduous Forest Plants
Carbon Cycle 1
Osmoregulation
4. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Second Law of Thermodynamics
Ecological Succession
Food Chain
Nitrogen
5. Integrated system of species that are dependent upon one another for survival
Aquatic Biomes
Community
Carnivores
Temperate Coniferous Plants
6. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Tropical Rain Forest Biome
Littoral Zone
Dominant Species
Taiga Biome
7. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Carbon Cycle 2
Physical Environment-Temperature
Population
Osmoregulation
8. 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
Benthos
Rootlike holdfasts
Food Pyramids
Grassland Animals
9. When a parasite benefits at the expense of the host
Parasitism
Abiotic (Physical) Environment
Biotic Community
Climate and weather
10. The chief disruptive force
Osmoregulation
Competition
Nitrogen Cycle 4
Aquatic Biomes
11. Any group of similar organisms that are capable of reproducing
Ecological Succession
Secondary Consumers
Lithosphere
Species
12. Sunlit layer of the open sea extending to a depth of 250-600ft
Temperate Deciduous Forest Animals
Nekton
Hemeothermic (Warm Blooded)
Photic zone
13. The vegetation that becomes dominant and stable after years of evolutiionary development
Coimax Vegetatioin
Epiphytes
Tundra Plants
Decomposer
14. Determined by the same decisive factors-temperatures and rainfall
Nitrogen cycle 1
Food Chain
Nature of Biomes
Intraspecific Interactions
15. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Taiga Plants
Substratum (soil/rock)
Nitrogen Cycle 3
Temperate Coniferous Plants
16. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Taiga Animals
Nature of Biomes
Pyramid of Numbers
Environment
17. 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
Symbionts
Taiga Animals
Taiga Biome
Temperate Deciduous Forest Biome
18. 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
Rootlike holdfasts
Carbon Cycle 1
Substratum-texture
Biotic Environment
19. Only animal life and other heterotrophic life exists
Thundra Animals
Aphotic Zone
Saprophytes
Population
20. 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
Secondary Consumers
Pyramid of Numbers
Nitrogen Cycle 4
21. Lichens and moss
Pelagic Zone
Tundra Plants
Material Cycles
Predator-Prey relationship
22. Conserve water actively
Nitrogen Cycle 3
Temperate Coniferous Forest Biome
Desert Plants
Grassland Biome
23. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Hemeothermic (Warm Blooded)
Abiotic (Physical) Environment
Intertidal Zone Population
Tertiary Consumers
24. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Desert Biome
Substratum-Minerals
Predator-Prey relationship
Community
25. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Hypotonic
Marine Biomes
Desert animals
Poikilothermic (Cold Blooded)
26. Needs constant energy source and cycling of materials between the living system
Herbivores
Conditions for stability in an Ecosystem
Nitrogen Cycle 2
Desert Biome
27. Developed long legs and many are hoofed
Grassland Animals
Saprophytes
Tropical Rain Forest Biome
Marshes
28. Affect the type of vegetation that can be supported
Material Cycles
Substratum-Minerals
Poikilothermic (Cold Blooded)
Parasitism
29. Determines water holding capacity
Nitrogen Cycle 2
Pioneer Organism
Substratum-texture
Aphotic Zone
30. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Nekton
Pyramid of Numbers
Intertidal Zone Population
Niche
31. When one organism is benefited by the association and the other is not affected
Secondary Consumers
Carbon Cycle 1
Scavengers
Commensalism
32. Food chain is not a simple linear chain but an intricate web
Marine Biomes
Food Web
Temperate Deciduous Forest Biome
Epiphytes
33. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Scavengers
Nitrogen cycle 1
Abiotic (Physical) Environment
Heterotrophs
34. 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
Physical Environment-Sunlight
Coimax Vegetatioin
Poikilothermic (Cold Blooded)
Rootlike holdfasts
35. Adaptations for maintaining their internal osmolarity and conserving water
Pyramid of Energy
Desert Plants
Conditions for stability in an Ecosystem
Osmoregulation
36. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Material Cycles
Taiga Animals
Niche
Littoral Zone
37. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Aphotic Zone
Tropical Rain Forest Animals
Ecological Succession
Temperate Deciduous Forest Biome
38. 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
Niche
Marine Biomes
Tropical Rain Forest Animals
39. One that exerts control over the other species that are present
Competition Same Niche 2
Dominant Species
Cohesive Force
Carbon Cycle 2
40. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Desert Plants
Symbionts
Nitrogen cycle 1
Tundra Biome
41. Region typical of the open seas and can be divided into photic and aphotic zones
Desert Biome
Other Cycles
Temperate Coniferous Forest Biome
Pelagic Zone
42. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Organism
Commensalism
Tropical Rain Forest Biome
Nitrogen Cycle 5
43. Links between oceans and land
Marshes
Biome
Food Chain
Tropical Rain Forest Animals
44. Rivers - lakes - ponds - and marshes
Freshwater Biomes
Temperate Deciduous Forest Plants
Biotic Community
Pyramid of Numbers
45. 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
Photic Zone
Tundra Plants
Population
Tundra Biome
46. Includes the community and the environment and usually all five kingdoms
Food Web
Littoral Zone
Competition Same Niche 3
Ecosystem
47. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Temperate Coniferous Forest Biome
Producers
Deep-sea Organisms
Substratum-Humus
48. 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
Competition Same Niche 3
Grassland Biome
Tertiary Consumers
Abiotic (Physical) Environment
49. Forest floors contain moss and lichens
Tertiary Consumers
Obligatory
Desert Plants
Taiga Plants
50. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Tundra Biome
Scavengers
Nitrogen Cycle 2
Aphotic Zone animals
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