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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. 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
Taiga Biome
Grassland Biome
Dentrified
Other Cycles
2. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Herbivores
Desert Plants
Biotic Environment
Biosphere
3. Encompasses all that is external to the organism and is necessary for its existence
Climate and weather
Competition Same Niche
Environment
Substratum-Minerals
4. Elemental nitrogen is chemically inert and cannot be used by most organisms. Lightning and nitrogen-fixing bacteria in the roots of legumes change the nitrogen into the usable - soluble nitrates
Nitrogen cycle 1
Tropical Rain Forest Plants
Parasitism
Heterotrophs
5. Vegetation such as vines and eppiphytes
Ecological Succession
Temperate Coniferous Plants
Tropical Rain Forest Plants
Parasitism
6. 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
Sere
Photic zone
Aphotic Zone
Nitrogen Cycle 4
7. Animals that consume green plants (herbivores)
Taiga Plants
Primary Consumers
Carbon Cycle 2
Abiotic (Physical) Environment
8. 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
Marshes
Niche
Photic Zone
Environmental Factors
9. Organisms that manufacture their own food
Aquatic Biomes
Autotrophs
Substratum-Minerals
Temperate Deciduous Forest Biome
10. Determines the nature of plant and animal life in the soil
Substratum-texture
Physical Environment-Temperature
Primary Consumers
Substratum (soil/rock)
11. The oceans
Nature of Biomes
Hydrosphere
Competition Same Niche 2
Sere
12. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Physical Environment- Water
Biotic Environment
Pioneer Organism
Poikilothermic (Cold Blooded)
13. When a parasite benefits at the expense of the host
Producers
Rootlike holdfasts
Parasitism
Polar Region
14. Includes the community and the environment and usually all five kingdoms
Climax Community
Ecosystem
Pyramid of Numbers
Ecological Succession
15. Freshwater Biomes vs. Saltwater 3: Freshwater biomes - except very large lakes - are affected by variations in _________. temperature of freshwater bodies varies considerably; they may freeze or dry up - and mud from their floors may be stirred up by
Nitrogen cycle 1
Climate and weather
Polar Region
Herbivores
16. 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
Heterotrophs
Grassland Animals
Desert animals
17. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Aphotic Zone
Food Web
Nitrified
Hydrosphere
18. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Communities
Organism
Pyramid of Numbers
Ecology
19. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Substratum (soil/rock)
Tertiary Consumers
Carnivores
Heterotrophs
20. 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
Nitrified
Ecology
Food Pyramids
Nitrogen Cycle 5
21. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Producers
Taiga Animals
Hemeothermic (Warm Blooded)
Competition
22. Group of organisms of the same species living together in a given location
Tundra Plants
Littoral Zone Populations
Sere
Population
23. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Symbionts
Primary Consumers
Aquatic Biomes
Substratum-texture
24. Animals that eat both plants and animals
Heterotrophs
Omnivores
Desert Plants
Carbon Cycle 2
25. Includes climate - temperature - availability of light and water - and the local topology
Tertiary Consumers
Scavengers
Freshwater Biomes
Abiotic (Physical) Environment
26. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Secondary Consumers
Nitrogen Cycle 3
Community
Nitrogen cycle 1
27. Recycle water - oxygen - and phosphorus
Taiga Biome
Grassland Animals
Temperate Deciduous Forest Animals
Other Cycles
28. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Organism
Food Chain
Temperate Deciduous Forest Plants
Taiga Biome
29. One that exerts control over the other species that are present
Intraspecific Interactions
Dominant Species
Nitrogen Cycle 5
Pyramid of Mass
30. 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
Desert Plants
Carbon Cycle 2
Dentrified
31. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Freshwater Biomes
Aphotic Zone animals
Environment
Biotic Environment
32. First to resettle a virgin area
Substratum-texture
Aphotic Zone
Pioneer Organism
Temperate Coniferous Forest Biome
33. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Temperate Deciduous Forest Biome
Tertiary Consumers
Poikilothermic (Cold Blooded)
Nitrogen Cycle 4
34. Crawling and sessile organsms
Benthos
Nitrified
Lithosphere
Omnivores
35. Sunlit layer of the open sea extending to a depth of 250-600ft
Desert Biome
Photic zone
Intraspecific Interactions
Competition Same Niche
36. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Heterotrophs
Aphotic Zone animals
Competition Same Niche
37. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Nitrogen cycle 1
Grassland Animals
Community
Predator-Prey relationship
38. Determined by the same decisive factors-temperatures and rainfall
Climax Community
Osmoregulation
Substratum-Humus
Nature of Biomes
39. Regiong beneatht he photic zone that receives no light
Hydrosphere
Aphotic Zone
Mutualims
Substratum-Humus
40. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Dentrified
Freshwater Biomes
Other Cycles
Osmoregulation
41. Rhododendrons and pines are more suited for growth in acid oil
Hemeothermic (Warm Blooded)
Substratum-pH
Photic Zone animals
Nitrogen Cycle 4
42. Forest floors contain moss and lichens
Temperate Deciduous Forest Animals
Tertiary Consumers
Producers
Taiga Plants
43. 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
Physical Environment- Water
Competition Same Niche 3
Organism
Abiotic (Physical) Environment
44. Animals that feed on secondary consumer
Tertiary Consumers
Desert Plants
Temperate Deciduous Forest Animals
Hydrosphere
45. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Communities
Photic Zone
Saprophytes
Biosphere
46. Links between oceans and land
Freshwater Biomes
Marshes
Nitrogen
Food Pyramids
47. Two fates await the ammonia (NH3). some are nitrified or dentrified
Nitrogen Cycle 5
Nitrogen Cycle 2
Commensalism
Environment
48. Determine by the amount of decaying plant and animal life in the soil
Sere
Physical Environment- Water
Deep-sea Organisms
Substratum-Humus
49. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Nitrogen Cycle 2
Food Web
Intertidal Zone Population
Herbivores
50. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Communities
Coimax Vegetatioin
Desert animals
Food Web