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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. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Abiotic (Physical) Environment
Substratum-Minerals
Nitrogen Cycle 2
Photic Zone animals
2. 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 Plants
Carbon Cycle 3
Material Cycles
Producers
3. Include reproduction and protection from predators and destructive weather
Ecological Succession
Aphotic Zone
Cohesive Force
Littoral Zone
4. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Substratum-Minerals
Pelagic Zone
Polar Region
Predator-Prey relationship
5. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Physical Environment- Water
Predators
Organism
Biotic Environment
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
Substratum-Minerals
Nitrogen Cycle 4
Herbivores
Aquatic Biomes
7. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Population
Mutualims
Marine Biomes
Conditions for stability in an Ecosystem
8. 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
Physical Environment- Water
Taiga Biome
Cohesive Force
Ecology
9. Symbiotic relationship from which both organisms derive some benefit
Environmental Factors
Tropical Rain Forest Animals
Physical Environment- Water
Mutualims
10. Integrated system of species that are dependent upon one another for survival
Community
Deep-sea Organisms
Physical Environment-Sunlight
Competition Same Niche
11. Vegetation such as vines and eppiphytes
Polar Region
Aphotic Zone
Littoral Zone Populations
Tropical Rain Forest Plants
12. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Ecosystem
Physical Environment-Temperature
Photic Zone animals
Dentrified
13. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Carbon Cycle 1
Taiga Animals
Littoral Zone Populations
Temperate Deciduous Forest Biome
14. 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
Carbon Cycle 2
Predator-Prey relationship
Tropical Rain Forest Animals
Desert Biome
15. Consists of populations of different plants and animal species interacting with each other in a given environment
Symbionts
Epiphytes
Communities
Climate and weather
16. Region typical of the open seas and can be divided into photic and aphotic zones
Pelagic Zone
Organism
Primary Consumers
Temperate Deciduous Forest Biome
17. 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
Deep-sea Organisms
Tundra Plants
Tundra Biome
Freshwater Biomes
18. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Aphotic Zone animals
Environmental Factors
Ecological Succession
Saprophytes
19. Determine by the amount of decaying plant and animal life in the soil
Symbionts
Aphotic Zone
Climate and weather
Substratum-Humus
20. 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
Nitrogen Cycle 5
Carnivores
Biotic Community
Pyramid of Mass
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
Hydrosphere
Taiga Plants
Carbon Cycle 2
Competition Same Niche 3
22. One or both organisms can't survive without the other
Food Pyramids
Environment
Obligatory
Benthos
23. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Producers
Conditions for stability in an Ecosystem
Tropical Rain Forest Animals
Physical Environment-Temperature
24. Polar bears - musk oxen - and arctic hens
Nitrogen cycle 1
Thundra Animals
Biotic Community
Marshes
25. Used to include only the population and not their physical environment
Biotic Community
Physical Environment- Water
Intertidal Zone Population
Desert animals
26. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Second Law of Thermodynamics
Photic Zone
Littoral Zone Populations
Symbionts
27. Conserve water actively
Marshes
Desert Plants
Marine Biomes
Littoral Zone
28. 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
Sere
Aquatic Biomes
Photic Zone
Saprophytes
29. Composed of populations that are able to exist under the new conditions
Physical Environment-Sunlight
Temperate Deciduous Forest Animals
Competition Same Niche
Successive Communities
30. The chief disruptive force
Heterotrophs
Food Web
Competition
Commensalism
31. The vegetation that becomes dominant and stable after years of evolutiionary development
Coimax Vegetatioin
Hemeothermic (Warm Blooded)
Carnivores
Lithosphere
32. 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
Lithosphere
Nitrogen cycle 1
Dominant Species
Hypotonic
33. 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
Taiga Plants
Carbon Cycle 3
Carbon Cycle 2
Competition
34. One that exerts control over the other species that are present
Benthos
Food Web
Osmoregulation
Dominant Species
35. Includes climate - temperature - availability of light and water - and the local topology
Abiotic (Physical) Environment
Competition Same Niche 2
Environmental Factors
Substratum-Minerals
36. Animals that feed on secondary consumer
Communities
Carbon Cycle 2
Tertiary Consumers
Polar Region
37. Lichens and moss
Tundra Plants
Poikilothermic (Cold Blooded)
Rootlike holdfasts
Species
38. Adaptations for maintaining their internal osmolarity and conserving water
Physical Environment- Water
Osmoregulation
Decomposer
Producers
39. Links between oceans and land
Temperate Deciduous Forest Animals
Hydrosphere
Epiphytes
Marshes
40. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Climax Community
Organism
Tertiary Consumers
Nature of Biomes
41. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Tropical Rain Forest Animals
Taiga Animals
Community
Nitrogen
42. When a parasite benefits at the expense of the host
Parasitism
Nitrogen
Competition Same Niche 3
Epiphytes
43. Animals that consume primary consumers (carnivores)
Environment
Symbionts
Secondary Consumers
Intertidal Zone
44. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Temperate Deciduous Forest Plants
Successive Communities
Nitrogen Cycle 5
Desert animals
45. Food chain is not a simple linear chain but an intricate web
Decomposer
Hydrosphere
Marine Biomes
Food Web
46. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Littoral Zone
Aphotic Zone
Environmental Factors
Physical Environment- Water
47. Deer - fox - woodchuck - and squirrel
Dentrified
Climate and weather
Temperate Deciduous Forest Animals
Ecology
48. Free-living organisms that feed on other living organisms
Predators
Deep-sea Organisms
Polar Region
Substratum-pH
49. Animals that consume only plants or plant foods
Herbivores
Predator-Prey relationship
Substratum-Humus
Substratum-Minerals
50. 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
Niche
Predator-Prey relationship
Intraspecific Interactions
Commensalism