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. 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
Tundra Biome
Environmental Factors
Rootlike holdfasts
Biotic Environment
2. 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
Autotrophs
Competition Same Niche 3
Temperate Deciduous Forest Animals
Pyramid of Mass
3. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Biotic Environment
Tropical Rain Forest Biome
Tundra Biome
Saprophytes
4. The vegetation that becomes dominant and stable after years of evolutiionary development
Temperate Deciduous Forest Animals
Coimax Vegetatioin
Deep-sea Organisms
Freshwater Biomes
5. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Other Cycles
Herbivores
Pelagic Zone
Taiga Animals
6. Region typical of the open seas and can be divided into photic and aphotic zones
Competition Same Niche 3
Nitrogen cycle 1
Herbivores
Pelagic Zone
7. One species may be competitively superior to the other and drive the second to extinction
Intertidal Zone
Competition Same Niche
Communities
Physical Environment-Temperature
8. When one organism is benefited by the association and the other is not affected
Commensalism
Tropical Rain Forest Animals
Ecosystem
Osmoregulation
9. 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
Competition Same Niche
Competition Same Niche 2
Littoral Zone
Taiga Biome
10. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Heterotrophs
Mutualims
Competition Same Niche
Littoral Zone Populations
11. 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
Dentrified
Littoral Zone Populations
Abiotic (Physical) Environment
12. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Substratum-Minerals
Ecological Succession
Marshes
Photic Zone animals
13. Rhododendrons and pines are more suited for growth in acid oil
Photic Zone
Deep-sea Organisms
Substratum-pH
Substratum-Humus
14. Conserve water actively
Desert Plants
Freshwater Biomes
Ecology
Physical Environment-Sunlight
15. 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
Obligatory
Intertidal Zone Population
Ecological Succession
Food Pyramids
16. 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
Primary Consumers
Pyramid of Energy
Parasitism
Dentrified
17. Deer - fox - woodchuck - and squirrel
Photic zone
Temperate Deciduous Forest Animals
Climate and weather
Physical Environment-Sunlight
18. Regiong beneatht he photic zone that receives no light
Aphotic Zone
Biotic Community
Carbon Cycle 2
Polar Region
19. Crawling and sessile organsms
Benthos
Physical Environment- Water
Ecological Succession
Desert Biome
20. 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
Predators
Climate and weather
Competition Same Niche 2
Secondary Consumers
21. Food chain is not a simple linear chain but an intricate web
Aphotic Zone animals
Food Web
Photic Zone
Climax Community
22. First to resettle a virgin area
Pioneer Organism
Scavengers
Climax Community
Substratum-Minerals
23. 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
Predator-Prey relationship
Temperate Coniferous Forest Biome
Communities
Photic Zone animals
24. Affect the type of vegetation that can be supported
Producers
Substratum-Minerals
Photic Zone animals
Dentrified
25. Lichens and moss
Biosphere
Predator-Prey relationship
Tundra Plants
Obligatory
26. The major component of the internal environment of all living things
Second Law of Thermodynamics
Physical Environment- Water
Ecological Succession
Nitrogen cycle 1
27. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Environment
Physical Environment-Temperature
Taiga Biome
Substratum-Minerals
28. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Scavengers
Rootlike holdfasts
Other Cycles
Polar Region
29. Recycle water - oxygen - and phosphorus
Heterotrophs
Photic zone
Population
Other Cycles
30. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Nitrogen
Intraspecific Interactions
Predator-Prey relationship
Poikilothermic (Cold Blooded)
31. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Deep-sea Organisms
Pyramid of Numbers
Desert animals
Hypotonic
32. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Parasitism
Producers
Aphotic Zone animals
Pelagic Zone
33. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Hemeothermic (Warm Blooded)
Climate and weather
Carbon Cycle 2
Benthos
34. Forest floors contain moss and lichens
Taiga Plants
Nitrogen Cycle 5
Producers
Lithosphere
35. 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
Temperate Deciduous Forest Plants
Substratum-pH
Saprophytes
Carnivores
36. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Epiphytes
Predators
Aphotic Zone animals
Marine Biomes
37. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Nitrogen Cycle 2
Thundra Animals
Primary Consumers
Pelagic Zone
38. 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
Environment
Taiga Biome
Aquatic Biomes
Community
39. Encompasses all that is external to the organism and is necessary for its existence
Tropical Rain Forest Plants
Environment
Desert Plants
Polar Region
40. 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
Food Chain
Predators
Hypotonic
Nitrogen
41. Adaptations for maintaining their internal osmolarity and conserving water
Photic Zone animals
Pelagic Zone
Osmoregulation
Grassland Animals
42. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Organism
Carbon Cycle 2
Tropical Rain Forest Animals
Nekton
43. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Competition Same Niche 3
Nitrogen Cycle 2
Nitrogen Cycle 3
Competition
44. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Niche
Nitrified
Omnivores
Desert animals
45. One or both organisms can't survive without the other
Niche
Obligatory
Scavengers
Material Cycles
46. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Scavengers
Population
Biotic Environment
Symbionts
47. The study of interactions between organisms and their environment
Herbivores
Dominant Species
Ecology
Tundra Plants
48. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Saprophytes
Biosphere
Secondary Consumers
Parasitism
49. Animals that consume primary consumers (carnivores)
Pyramid of Numbers
Secondary Consumers
Dentrified
Nitrogen Cycle 4
50. Because organisms at the upper levels of the food chain derive their food energy from organisms at lower levels - and because energy is lost from one level to the next - each level can support a successively smaller biomass
Pyramid of Energy
Pyramid of Mass
Climate and weather
Photic Zone