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. One that exerts control over the other species that are present
Dominant Species
Ecosystem
Physical Environment-Sunlight
Biotic Community
2. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Nitrified
Polar Region
Hypotonic
Dominant Species
3. 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 Population
Nitrogen
Pyramid of Numbers
Nitrogen Cycle 3
4. Region typical of the open seas and can be divided into photic and aphotic zones
Thundra Animals
Secondary Consumers
Biotic Environment
Pelagic Zone
5. Includes climate - temperature - availability of light and water - and the local topology
Abiotic (Physical) Environment
Second Law of Thermodynamics
Substratum (soil/rock)
Aphotic Zone
6. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Desert Biome
Aphotic Zone
Climax Community
Pyramid of Numbers
7. 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
Pelagic Zone
Carbon Cycle 2
Ecological Succession
Nitrogen Cycle 2
8. Rhododendrons and pines are more suited for growth in acid oil
Temperate Deciduous Forest Biome
Predators
Substratum-pH
Primary Consumers
9. Links between oceans and land
Aphotic Zone
Marshes
Ecosystem
Pioneer Organism
10. 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
Temperate Deciduous Forest Animals
Grassland Biome
Desert Biome
Dominant Species
11. Regiong beneatht he photic zone that receives no light
Substratum (soil/rock)
Nitrified
Aphotic Zone
Marine Biomes
12. Animals that consume only plants or plant foods
Competition Same Niche 2
Commensalism
Herbivores
Biotic Environment
13. Only animal life and other heterotrophic life exists
Aphotic Zone
Osmoregulation
Material Cycles
Abiotic (Physical) Environment
14. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Physical Environment- Water
Littoral Zone
Pyramid of Numbers
Nitrogen Cycle 2
15. 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
Nitrogen Cycle 3
Abiotic (Physical) Environment
Hypotonic
Tundra Biome
16. Two fates await the ammonia (NH3). some are nitrified or dentrified
Littoral Zone Populations
Herbivores
Nitrogen Cycle 5
Physical Environment- Water
17. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Pyramid of Mass
Dominant Species
Environmental Factors
Producers
18. 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
Obligatory
Symbionts
Desert Biome
Successive Communities
19. One or both organisms can't survive without the other
Nitrogen Cycle 4
Physical Environment-Temperature
Hypotonic
Obligatory
20. Developed long legs and many are hoofed
Secondary Consumers
Carbon Cycle 3
Grassland Animals
Carbon Cycle 2
21. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Rootlike holdfasts
Substratum-pH
Marine Biomes
Niche
22. 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
Desert Plants
Ecosystem
Hemeothermic (Warm Blooded)
Nitrogen cycle 1
23. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Primary Consumers
Biosphere
Hemeothermic (Warm Blooded)
Photic zone
24. 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
Deep-sea Organisms
Hypotonic
Grassland Biome
Abiotic (Physical) Environment
25. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Nekton
Predator-Prey relationship
Taiga Biome
Intertidal Zone Population
26. Includes the community and the environment and usually all five kingdoms
Rootlike holdfasts
Ecosystem
Photic Zone animals
Taiga Plants
27. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Herbivores
Producers
Secondary Consumers
Food Pyramids
28. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Scavengers
Intertidal Zone Population
Coimax Vegetatioin
Nekton
29. Sunlit layer of the open sea extending to a depth of 250-600ft
Photic zone
Food Pyramids
Symbionts
Nitrogen Cycle 4
30. Rock and soil surface
Nitrogen Cycle 2
Lithosphere
Aquatic Biomes
Photic Zone animals
31. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Tundra Biome
Temperate Deciduous Forest Plants
Parasitism
32. Integrated system of species that are dependent upon one another for survival
Ecosystem
Pelagic Zone
Substratum-texture
Community
33. 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
Species
Photic Zone animals
Saprophytes
Aquatic Biomes
34. Organisms that manufacture their own food
Autotrophs
Substratum-pH
Aphotic Zone
Poikilothermic (Cold Blooded)
35. Symbiotic relationship from which both organisms derive some benefit
Ecological Succession
Mutualims
Hypotonic
Desert Plants
36. Determines the nature of plant and animal life in the soil
Communities
Grassland Animals
Second Law of Thermodynamics
Substratum (soil/rock)
37. Animals that eat both plants and animals
Successive Communities
Omnivores
Physical Environment-Temperature
Benthos
38. Forest floors contain moss and lichens
Tropical Rain Forest Plants
Taiga Plants
Physical Environment-Sunlight
Physical Environment-Temperature
39. The study of interactions between organisms and their environment
Ecology
Nitrogen Cycle 4
Biotic Community
Scavengers
40. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Biotic Environment
Obligatory
Dominant Species
Symbionts
41. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Aphotic Zone
Nitrogen
Climax Community
Substratum-texture
42. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Temperate Deciduous Forest Biome
Desert Biome
Deep-sea Organisms
Food Chain
43. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Other Cycles
Tundra Biome
Organism
Tundra Plants
44. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Nitrogen cycle 1
Carbon Cycle 3
Tropical Rain Forest Animals
Commensalism
45. 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
Polar Region
Aquatic Biomes
Nitrogen Cycle 3
Hemeothermic (Warm Blooded)
46. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Competition Same Niche 3
Symbionts
Second Law of Thermodynamics
Predators
47. 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
Nitrogen Cycle 3
Decomposer
Niche
Desert Biome
48. 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
Environment
Mutualims
Substratum-pH
Second Law of Thermodynamics
49. First to resettle a virgin area
Tundra Biome
Hydrosphere
Pioneer Organism
Primary Consumers
50. 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
Lithosphere
Parasitism
Biosphere
Competition Same Niche 2