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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. Crawling and sessile organsms
Benthos
Secondary Consumers
Temperate Coniferous Forest Biome
Marshes
2. Includes climate - temperature - availability of light and water - and the local topology
Tundra Biome
Physical Environment-Temperature
Abiotic (Physical) Environment
Successive Communities
3. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Hemeothermic (Warm Blooded)
Autotrophs
Photic Zone
Environmental Factors
4. 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
Taiga Plants
Mutualims
Ecosystem
Aquatic Biomes
5. Animals that eat both plants and animals
Physical Environment- Water
Species
Tertiary Consumers
Omnivores
6. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Biotic Environment
Desert Biome
Sere
Polar Region
7. Composed of populations that are able to exist under the new conditions
Climate and weather
Successive Communities
Producers
Desert Plants
8. Animals that consume green plants (herbivores)
Ecological Succession
Cohesive Force
Primary Consumers
Symbionts
9. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Nitrogen Cycle 5
Ecology
Nitrified
Photic Zone
10. Food chain is not a simple linear chain but an intricate web
Food Web
Producers
Sere
Scavengers
11. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Herbivores
Photic Zone animals
Hypotonic
Competition
12. 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
Nitrogen
Biotic Community
Biome
13. 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
Nitrogen
Rootlike holdfasts
Hypotonic
Nitrogen Cycle 5
14. When a parasite benefits at the expense of the host
Niche
Temperate Coniferous Plants
Parasitism
Tropical Rain Forest Biome
15. Animals that consume primary consumers (carnivores)
Deep-sea Organisms
Communities
Secondary Consumers
Nitrogen Cycle 3
16. Group of organisms of the same species living together in a given location
Population
Littoral Zone Populations
Nitrogen cycle 1
Food Web
17. 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
Taiga Biome
Successive Communities
Hypotonic
Food Pyramids
18. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Dentrified
Abiotic (Physical) Environment
Biotic Community
Physical Environment-Sunlight
19. The major component of the internal environment of all living things
Temperate Deciduous Forest Biome
Physical Environment- Water
Nitrogen Cycle 3
Mutualims
20. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Poikilothermic (Cold Blooded)
Lithosphere
Predators
Hydrosphere
21. 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
Rootlike holdfasts
Benthos
Grassland Animals
Competition Same Niche 2
22. Only animal life and other heterotrophic life exists
Aphotic Zone
Substratum-Minerals
Tertiary Consumers
Tropical Rain Forest Animals
23. 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 3
Nitrogen Cycle 4
Omnivores
Carnivores
24. Distinct community in a geographic region
Biome
Marine Biomes
Thundra Animals
Temperate Coniferous Plants
25. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Temperate Coniferous Forest Biome
Temperate Coniferous Plants
Aquatic Biomes
Marine Biomes
26. Two fates await the ammonia (NH3). some are nitrified or dentrified
Tropical Rain Forest Animals
Environment
Carbon Cycle 2
Nitrogen Cycle 5
27. Any group of similar organisms that are capable of reproducing
Substratum (soil/rock)
Nitrogen cycle 1
Aphotic Zone animals
Species
28. Regiong beneatht he photic zone that receives no light
Mutualims
Substratum-pH
Temperate Deciduous Forest Plants
Aphotic Zone
29. Links between oceans and land
Littoral Zone Populations
Physical Environment- Water
Marshes
Temperate Coniferous Plants
30. Rock and soil surface
Lithosphere
Deep-sea Organisms
Biosphere
Pyramid of Energy
31. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Nitrogen Cycle 3
Coimax Vegetatioin
Deep-sea Organisms
Successive Communities
32. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Carbon Cycle 2
Other Cycles
Population
Nitrogen Cycle 2
33. 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
Second Law of Thermodynamics
Pelagic Zone
Parasitism
Dentrified
34. 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
Predator-Prey relationship
Nitrified
Grassland Animals
35. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Tropical Rain Forest Biome
Obligatory
Nature of Biomes
Aphotic Zone animals
36. Animals that feed on secondary consumer
Nitrogen Cycle 4
Aquatic Biomes
Obligatory
Tertiary Consumers
37. Each member of a food chain uses some of the energy it obtains from its food for its own metabolism and loses some additional energy in the form of heat
Pyramid of Energy
Physical Environment- Water
Tropical Rain Forest Plants
Temperate Deciduous Forest Animals
38. Symbiotic relationship from which both organisms derive some benefit
Sere
Mutualims
Substratum-Humus
Deep-sea Organisms
39. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Coimax Vegetatioin
Competition
Hypotonic
Nitrified
40. Consists of populations of different plants and animal species interacting with each other in a given environment
Climate and weather
Nitrogen Cycle 2
Symbionts
Communities
41. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Tundra Biome
Tropical Rain Forest Animals
Rootlike holdfasts
Dominant Species
42. The study of interactions between organisms and their environment
Tropical Rain Forest Plants
Nekton
Hypotonic
Ecology
43. Include saprophytic organisms and organisms of decay
Decomposer
Temperate Deciduous Forest Plants
Producers
Physical Environment-Sunlight
44. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Nitrogen Cycle 3
Scavengers
Material Cycles
Heterotrophs
45. Recycle water - oxygen - and phosphorus
Competition
Secondary Consumers
Lithosphere
Other Cycles
46. 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
Carbon Cycle 1
Heterotrophs
Taiga Biome
Grassland Animals
47. 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
Carnivores
Carbon Cycle 2
Environment
48. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Hypotonic
Taiga Animals
Material Cycles
Freshwater Biomes
49. Determined by the same decisive factors-temperatures and rainfall
Nature of Biomes
Polar Region
Grassland Biome
Desert Biome
50. 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
Nekton
Tundra Biome
Carbon Cycle 2
Heterotrophs