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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. Encompasses all that is external to the organism and is necessary for its existence
Carbon Cycle 3
Obligatory
Second Law of Thermodynamics
Environment
2. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Herbivores
Aphotic Zone
Tropical Rain Forest Biome
Climax Community
3. Composed of populations that are able to exist under the new conditions
Nitrogen Cycle 2
Autotrophs
Successive Communities
Pyramid of Energy
4. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Omnivores
Biotic Environment
Nitrogen Cycle 2
Grassland Animals
5. Animals that consume only plants or plant foods
Grassland Animals
Taiga Animals
Organism
Herbivores
6. Region typical of the open seas and can be divided into photic and aphotic zones
Nitrogen
Competition Same Niche
Mutualims
Pelagic Zone
7. When a parasite benefits at the expense of the host
Aphotic Zone
Parasitism
Intraspecific Interactions
Lithosphere
8. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Marshes
Aphotic Zone
Cohesive Force
Nitrogen
9. Affect the type of vegetation that can be supported
Cohesive Force
Aquatic Biomes
Substratum-Minerals
Tundra Plants
10. 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
Temperate Deciduous Forest Biome
Food Pyramids
Taiga Plants
Symbionts
11. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Nitrified
Population
Coimax Vegetatioin
Primary Consumers
12. The ultimate source of energy for all organisms
Hypotonic
Physical Environment-Sunlight
Tundra Plants
Littoral Zone
13. 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
Nitrogen Cycle 3
Autotrophs
Second Law of Thermodynamics
Cohesive Force
14. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Biotic Environment
Tundra Plants
Taiga Animals
Coimax Vegetatioin
15. 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
Pyramid of Energy
Primary Consumers
Epiphytes
Nitrogen Cycle 4
16. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Abiotic (Physical) Environment
Symbionts
Food Chain
Carbon Cycle 2
17. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Hydrosphere
Intertidal Zone Population
Taiga Biome
Omnivores
18. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Intertidal Zone
Nitrogen Cycle 3
Nitrogen
Climate and weather
19. Determine by the amount of decaying plant and animal life in the soil
Dominant Species
Temperate Coniferous Plants
Substratum-Humus
Littoral Zone Populations
20. 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
Carnivores
Marine Biomes
Taiga Animals
Nitrified
21. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Hydrosphere
Herbivores
Taiga Animals
Photic Zone animals
22. 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
Predator-Prey relationship
Hypotonic
Photic zone
Parasitism
23. Community in an ecological succession is identified by a dominant species
Climate and weather
Sere
Competition Same Niche
Commensalism
24. Animals that consume green plants (herbivores)
Pelagic Zone
Dentrified
Primary Consumers
Nitrogen Cycle 5
25. Animals that consume primary consumers (carnivores)
Food Pyramids
Secondary Consumers
Mutualims
Poikilothermic (Cold Blooded)
26. Distinct community in a geographic region
Biome
Grassland Animals
Temperate Deciduous Forest Plants
Lithosphere
27. Only animal life and other heterotrophic life exists
Aphotic Zone
Thundra Animals
Marshes
Competition Same Niche 3
28. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Nitrified
Intertidal Zone
Biosphere
Littoral Zone Populations
29. First to resettle a virgin area
Pioneer Organism
Temperate Deciduous Forest Biome
Competition Same Niche 2
Niche
30. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Food Pyramids
Littoral Zone
Aquatic Biomes
Aphotic Zone
31. 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
Parasitism
Biosphere
Saprophytes
Tundra Biome
32. Integrated system of species that are dependent upon one another for survival
Community
Nitrogen
Heterotrophs
Predator-Prey relationship
33. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Substratum-Minerals
Successive Communities
Organism
Nitrogen
34. Rhododendrons and pines are more suited for growth in acid oil
Marshes
Hydrosphere
Substratum-pH
Photic Zone animals
35. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Nitrogen Cycle 5
Physical Environment-Sunlight
Substratum-Minerals
Hemeothermic (Warm Blooded)
36. Two fates await the ammonia (NH3). some are nitrified or dentrified
Intertidal Zone Population
Pyramid of Numbers
Material Cycles
Nitrogen Cycle 5
37. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Decomposer
Biosphere
Benthos
Marshes
38. When one organism is benefited by the association and the other is not affected
Commensalism
Biome
Aphotic Zone animals
Physical Environment-Temperature
39. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Hypotonic
Hydrosphere
Predator-Prey relationship
Epiphytes
40. 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
Intertidal Zone Population
Substratum-pH
Nitrogen Cycle 2
Carbon Cycle 1
41. 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
Material Cycles
Coimax Vegetatioin
Intraspecific Interactions
Temperate Deciduous Forest Biome
42. Conserve water actively
Autotrophs
Desert Plants
Ecosystem
Species
43. 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
Food Chain
Aquatic Biomes
Tropical Rain Forest Biome
Tundra Biome
44. 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
Tropical Rain Forest Plants
Taiga Biome
Successive Communities
Aphotic Zone animals
45. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Competition Same Niche 3
Littoral Zone
Ecological Succession
Material Cycles
46. Includes the community and the environment and usually all five kingdoms
Secondary Consumers
Competition Same Niche 2
Nitrogen Cycle 4
Ecosystem
47. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Successive Communities
Physical Environment-Temperature
Marshes
Omnivores
48. Symbiotic relationship from which both organisms derive some benefit
Mutualims
Pioneer Organism
Desert Plants
Environmental Factors
49. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Omnivores
Temperate Deciduous Forest Animals
Pyramid of Numbers
Pelagic Zone
50. Nekton and benthos - scavengers - and predators (fiercely competitive)
Ecology
Temperate Coniferous Plants
Aphotic Zone animals
Substratum-texture