SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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. 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
Tropical Rain Forest Animals
Pyramid of Energy
Successive Communities
Organism
2. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Herbivores
Nitrogen
Hemeothermic (Warm Blooded)
Producers
3. Animals that consume only plants or plant foods
Marine Biomes
Herbivores
Producers
Intraspecific Interactions
4. Symbiotic relationship from which both organisms derive some benefit
Mutualims
Temperate Deciduous Forest Animals
Physical Environment-Temperature
Pyramid of Numbers
5. Include reproduction and protection from predators and destructive weather
Mutualims
Carbon Cycle 3
Cohesive Force
Freshwater Biomes
6. The major component of the internal environment of all living things
Tertiary Consumers
Physical Environment- Water
Heterotrophs
Nitrogen Cycle 2
7. Cold - dry - and inhabited by fir - pine - and spruce trees -much vegetation has evolved adaptations for water conservation such as needle-shaped leaves -Extreme Northern Part of the US and in Southern Canada
Epiphytes
Lithosphere
Temperate Coniferous Forest Biome
Nitrogen cycle 1
8. Animals that consume dead animals
Cohesive Force
Competition Same Niche 3
Scavengers
Climate and weather
9. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Climax Community
Food Web
Sere
Nitrogen Cycle 2
10. Include saprophytic organisms and organisms of decay
Intertidal Zone
Decomposer
Autotrophs
Osmoregulation
11. Links between oceans and land
Primary Consumers
Competition
Marshes
Communities
12. Regiong beneatht he photic zone that receives no light
Aphotic Zone
Carnivores
Littoral Zone
Parasitism
13. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Nitrogen Cycle 4
Carbon Cycle 2
Symbionts
Environmental Factors
14. Affect the type of vegetation that can be supported
Competition Same Niche
Competition
Substratum-Minerals
Nitrogen cycle 1
15. Animals that consume green plants (herbivores)
Hypotonic
Primary Consumers
Deep-sea Organisms
Pioneer Organism
16. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Pyramid of Numbers
Osmoregulation
Littoral Zone
Intertidal Zone
17. When a parasite benefits at the expense of the host
Freshwater Biomes
Competition Same Niche 3
Parasitism
Tropical Rain Forest Plants
18. Composed of populations that are able to exist under the new conditions
Food Web
Substratum-Humus
Taiga Biome
Successive Communities
19. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Dentrified
Temperate Deciduous Forest Animals
Sere
Population
20. Conserve water actively
Rootlike holdfasts
Desert Plants
Taiga Biome
Aphotic Zone animals
21. 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
Autotrophs
Intertidal Zone
Saprophytes
Biome
22. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Tundra Plants
Obligatory
Material Cycles
Nitrogen Cycle 3
23. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Physical Environment-Temperature
Competition Same Niche 2
Biosphere
Population
24. Distinct community in a geographic region
Saprophytes
Ecological Succession
Community
Biome
25. Includes the community and the environment and usually all five kingdoms
Ecosystem
Temperate Deciduous Forest Plants
Abiotic (Physical) Environment
Symbionts
26. Needs constant energy source and cycling of materials between the living system
Aphotic Zone
Decomposer
Conditions for stability in an Ecosystem
Other Cycles
27. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Tertiary Consumers
Temperate Coniferous Plants
Intertidal Zone Population
Deep-sea Organisms
28. The oceans
Decomposer
Carbon Cycle 3
Hydrosphere
Carnivores
29. Encompasses all that is external to the organism and is necessary for its existence
Food Chain
Secondary Consumers
Environment
Pyramid of Numbers
30. Lichens and moss
Tundra Plants
Dentrified
Sere
Nitrogen Cycle 5
31. 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
Rootlike holdfasts
Nitrogen Cycle 3
Successive Communities
Conditions for stability in an Ecosystem
32. Polar bears - musk oxen - and arctic hens
Rootlike holdfasts
Temperate Coniferous Forest Biome
Thundra Animals
Hydrosphere
33. Group of organisms of the same species living together in a given location
Population
Competition
Aquatic Biomes
Competition Same Niche 2
34. 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
Niche
Desert Biome
Aphotic Zone animals
Commensalism
35. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Lithosphere
Tropical Rain Forest Plants
Pioneer Organism
Poikilothermic (Cold Blooded)
36. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Communities
Marine Biomes
Pyramid of Energy
Nitrogen cycle 1
37. Recycle water - oxygen - and phosphorus
Decomposer
Nitrogen Cycle 3
Other Cycles
Physical Environment-Sunlight
38. Vegetation such as vines and eppiphytes
Species
Tropical Rain Forest Plants
Osmoregulation
Competition Same Niche
39. Determines water holding capacity
Decomposer
Substratum-texture
Coimax Vegetatioin
Tropical Rain Forest Biome
40. First to resettle a virgin area
Pioneer Organism
Grassland Biome
Species
Carbon Cycle 3
41. 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
Ecological Succession
Herbivores
Intraspecific Interactions
Taiga Biome
42. 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
Competition Same Niche 2
Second Law of Thermodynamics
Competition
Abiotic (Physical) Environment
43. Animals that feed on secondary consumer
Aphotic Zone
Tertiary Consumers
Sere
Benthos
44. Any group of similar organisms that are capable of reproducing
Population
Lithosphere
Successive Communities
Species
45. Rock and soil surface
Carbon Cycle 2
Lithosphere
Conditions for stability in an Ecosystem
Pyramid of Energy
46. Crawling and sessile organsms
Taiga Plants
Tropical Rain Forest Plants
Ecology
Benthos
47. Food chain is not a simple linear chain but an intricate web
Food Web
Physical Environment-Sunlight
Substratum-Humus
Nitrogen Cycle 3
48. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Photic Zone
Epiphytes
Obligatory
Omnivores
49. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Communities
Dentrified
Taiga Plants
50. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Physical Environment- Water
Temperate Coniferous Plants
Nitrified
Freshwater Biomes