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. Polar bears - musk oxen - and arctic hens
Photic Zone
Thundra Animals
Tropical Rain Forest Biome
Food Pyramids
2. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Hypotonic
Substratum-Humus
Obligatory
Ecological Succession
3. Includes climate - temperature - availability of light and water - and the local topology
Desert Biome
Abiotic (Physical) Environment
Nitrogen Cycle 3
Aquatic Biomes
4. Animals that eat both plants and animals
Desert animals
Environment
Taiga Biome
Omnivores
5. 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
Hypotonic
Substratum-texture
Second Law of Thermodynamics
Other Cycles
6. Encompasses all that is external to the organism and is necessary for its existence
Littoral Zone
Cohesive Force
Environment
Conditions for stability in an Ecosystem
7. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Autotrophs
Nitrogen Cycle 3
Food Chain
Biotic Community
8. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Taiga Biome
Intertidal Zone Population
Polar Region
Omnivores
9. 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
Organism
Carnivores
10. 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
Taiga Plants
Carbon Cycle 2
Hemeothermic (Warm Blooded)
Tundra Plants
11. Community in an ecological succession is identified by a dominant species
Mutualims
Sere
Biotic Environment
Taiga Biome
12. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Conditions for stability in an Ecosystem
Nitrogen Cycle 2
Aphotic Zone
Taiga Animals
13. 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
Nature of Biomes
Intertidal Zone Population
Climate and weather
Material Cycles
14. Crawling and sessile organsms
Symbionts
Benthos
Ecosystem
Biome
15. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Intertidal Zone
Biosphere
Intertidal Zone Population
Climax Community
16. One species may be competitively superior to the other and drive the second to extinction
Species
Competition Same Niche
Benthos
Communities
17. The ultimate source of energy for all organisms
Photic zone
Desert Plants
Parasitism
Physical Environment-Sunlight
18. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Photic Zone animals
Competition Same Niche
Photic zone
Pyramid of Mass
19. Rock and soil surface
Nature of Biomes
Lithosphere
Intertidal Zone Population
Littoral Zone
20. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Nitrogen Cycle 2
Photic zone
Hypotonic
Conditions for stability in an Ecosystem
21. One or both organisms can't survive without the other
Temperate Coniferous Plants
Obligatory
Biotic Community
Temperate Deciduous Forest Animals
22. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Epiphytes
Heterotrophs
Ecology
Primary Consumers
23. Animals that consume dead animals
Freshwater Biomes
Scavengers
Ecosystem
Nitrogen Cycle 2
24. 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
Producers
Primary Consumers
Species
Carnivores
25. 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
Sere
Tropical Rain Forest Plants
Tundra Biome
Deep-sea Organisms
26. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Photic Zone
Epiphytes
Physical Environment-Temperature
Pyramid of Mass
27. Any group of similar organisms that are capable of reproducing
Tundra Biome
Species
Ecological Succession
Photic zone
28. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Material Cycles
Desert animals
Species
Nitrogen Cycle 3
29. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Thundra Animals
Nitrogen Cycle 4
Successive Communities
Littoral Zone
30. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Temperate Deciduous Forest Plants
Obligatory
Physical Environment-Temperature
Dentrified
31. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Benthos
Predator-Prey relationship
Tundra Biome
Decomposer
32. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Symbionts
Marine Biomes
Biosphere
Temperate Deciduous Forest Plants
33. Region typical of the open seas and can be divided into photic and aphotic zones
Biotic Environment
Pelagic Zone
Intraspecific Interactions
Temperate Deciduous Forest Biome
34. The chief disruptive force
Competition
Nitrogen
Hydrosphere
Lithosphere
35. Recycle water - oxygen - and phosphorus
Other Cycles
Saprophytes
Nitrogen
Competition Same Niche 2
36. Symbiotic relationship from which both organisms derive some benefit
Scavengers
Mutualims
Saprophytes
Heterotrophs
37. The vegetation that becomes dominant and stable after years of evolutiionary development
Polar Region
Herbivores
Coimax Vegetatioin
Temperate Coniferous Plants
38. Include saprophytic organisms and organisms of decay
Intertidal Zone
Decomposer
Population
Aphotic Zone animals
39. Nekton and benthos - scavengers - and predators (fiercely competitive)
Biotic Community
Photic zone
Producers
Aphotic Zone animals
40. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Nitrogen
Nekton
Temperate Deciduous Forest Plants
Osmoregulation
41. The oceans
Hydrosphere
Thundra Animals
Commensalism
Primary Consumers
42. Free-living organisms that feed on other living organisms
Hemeothermic (Warm Blooded)
Predators
Rootlike holdfasts
Successive Communities
43. Include reproduction and protection from predators and destructive weather
Heterotrophs
Climax Community
Littoral Zone
Cohesive Force
44. The major component of the internal environment of all living things
Competition Same Niche
Physical Environment- Water
Physical Environment-Sunlight
Carnivores
45. 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
Poikilothermic (Cold Blooded)
Pyramid of Energy
Grassland Biome
Tundra Biome
46. Organisms that manufacture their own food
Grassland Biome
Nitrified
Photic zone
Autotrophs
47. Regiong beneatht he photic zone that receives no light
Other Cycles
Aphotic Zone
Pyramid of Numbers
Littoral Zone Populations
48. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Nitrogen
Physical Environment-Temperature
Food Pyramids
Predators
49. 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
Saprophytes
Communities
Material Cycles
Competition Same Niche 3
50. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Intertidal Zone
Biotic Environment
Deep-sea Organisms
Organism
Sorry!:) No result found.
Can you answer 50 questions in 15 minutes?
Let me suggest you:
Browse all subjects
Browse all tests
Most popular tests
Major Subjects
Tests & Exams
AP
CLEP
DSST
GRE
SAT
GMAT
Certifications
CISSP go to https://www.isc2.org/
PMP
ITIL
RHCE
MCTS
More...
IT Skills
Android Programming
Data Modeling
Objective C Programming
Basic Python Programming
Adobe Illustrator
More...
Business Skills
Advertising Techniques
Business Accounting Basics
Business Strategy
Human Resource Management
Marketing Basics
More...
Soft Skills
Body Language
People Skills
Public Speaking
Persuasion
Job Hunting And Resumes
More...
Vocabulary
GRE Vocab
SAT Vocab
TOEFL Essential Vocab
Basic English Words For All
Global Words You Should Know
Business English
More...
Languages
AP German Vocab
AP Latin Vocab
SAT Subject Test: French
Italian Survival
Norwegian Survival
More...
Engineering
Audio Engineering
Computer Science Engineering
Aerospace Engineering
Chemical Engineering
Structural Engineering
More...
Health Sciences
Basic Nursing Skills
Health Science Language Fundamentals
Veterinary Technology Medical Language
Cardiology
Clinical Surgery
More...
English
Grammar Fundamentals
Literary And Rhetorical Vocab
Elements Of Style Vocab
Introduction To English Major
Complete Advanced Sentences
Literature
Homonyms
More...
Math
Algebra Formulas
Basic Arithmetic: Measurements
Metric Conversions
Geometric Properties
Important Math Facts
Number Sense Vocab
Business Math
More...
Other Major Subjects
Science
Economics
History
Law
Performing-arts
Cooking
Logic & Reasoning
Trivia
Browse all subjects
Browse all tests
Most popular tests