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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. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Symbionts
Autotrophs
Temperate Deciduous Forest Plants
Conditions for stability in an Ecosystem
2. Free-living organisms that feed on other living organisms
Commensalism
Other Cycles
Predators
Physical Environment- Water
3. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Autotrophs
Tropical Rain Forest Biome
Sere
Tropical Rain Forest Animals
4. 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
Pelagic Zone
Polar Region
Pyramid of Energy
Autotrophs
5. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Pyramid of Numbers
Cohesive Force
Hemeothermic (Warm Blooded)
Nitrogen Cycle 5
6. 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
Intertidal Zone
Nitrogen
Physical Environment- Water
Saprophytes
7. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Aquatic Biomes
Taiga Animals
Nitrogen
Carbon Cycle 2
8. 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
Predator-Prey relationship
Climate and weather
Tropical Rain Forest Animals
Aphotic Zone animals
9. 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
Conditions for stability in an Ecosystem
Decomposer
10. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Tropical Rain Forest Plants
Scavengers
Intertidal Zone Population
Biotic Environment
11. Rivers - lakes - ponds - and marshes
Predator-Prey relationship
Substratum-texture
Substratum-pH
Freshwater Biomes
12. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Hydrosphere
Carbon Cycle 2
Coimax Vegetatioin
Tropical Rain Forest Animals
13. Determines the nature of plant and animal life in the soil
Substratum (soil/rock)
Photic Zone animals
Polar Region
Carbon Cycle 2
14. Group of organisms of the same species living together in a given location
Substratum-Humus
Population
Heterotrophs
Nature of Biomes
15. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Producers
Biotic Environment
Tropical Rain Forest Animals
Nitrified
16. One species may be competitively superior to the other and drive the second to extinction
Competition Same Niche 3
Dominant Species
Successive Communities
Competition Same Niche
17. Algae - crabs - crustacea - and many different species of fish
Littoral Zone Populations
Substratum-Minerals
Littoral Zone
Carbon Cycle 1
18. Determines water holding capacity
Conditions for stability in an Ecosystem
Intraspecific Interactions
Substratum-texture
Competition Same Niche
19. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Rootlike holdfasts
Taiga Animals
Littoral Zone Populations
Deep-sea Organisms
20. The vegetation that becomes dominant and stable after years of evolutiionary development
Population
Scavengers
Coimax Vegetatioin
Competition Same Niche 3
21. Include reproduction and protection from predators and destructive weather
Pyramid of Numbers
Cohesive Force
Grassland Animals
Freshwater Biomes
22. 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
Grassland Animals
Nitrogen Cycle 3
Temperate Deciduous Forest Plants
23. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Nitrogen Cycle 2
Competition
Grassland Biome
Nitrogen Cycle 3
24. Adaptations for maintaining their internal osmolarity and conserving water
Substratum-pH
Temperate Deciduous Forest Animals
Aphotic Zone animals
Osmoregulation
25. 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
Saprophytes
Scavengers
Hemeothermic (Warm Blooded)
26. The chief disruptive force
Population
Niche
Pioneer Organism
Competition
27. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Coimax Vegetatioin
Climax Community
Marshes
Mutualims
28. Crawling and sessile organsms
Grassland Animals
Carbon Cycle 3
Benthos
Tropical Rain Forest Plants
29. When one organism is benefited by the association and the other is not affected
Biotic Environment
Commensalism
Hypotonic
Nitrogen Cycle 2
30. Composed of populations that are able to exist under the new conditions
Tertiary Consumers
Rootlike holdfasts
Biotic Environment
Successive Communities
31. Only animal life and other heterotrophic life exists
Aphotic Zone
Predator-Prey relationship
Symbionts
Taiga Plants
32. 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
Substratum-pH
Biome
Autotrophs
33. The major component of the internal environment of all living things
Benthos
Second Law of Thermodynamics
Competition Same Niche 3
Physical Environment- Water
34. 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
Dominant Species
Aphotic Zone
Carbon Cycle 2
Food Web
35. 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
Competition
Physical Environment-Temperature
Competition Same Niche 2
Desert Biome
36. Vegetation such as vines and eppiphytes
Tropical Rain Forest Plants
Epiphytes
Nitrogen Cycle 3
Grassland Biome
37. Rock and soil surface
Littoral Zone
Lithosphere
Biosphere
Grassland Animals
38. Animals that consume dead animals
Pioneer Organism
Intraspecific Interactions
Conditions for stability in an Ecosystem
Scavengers
39. 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
Taiga Plants
Ecosystem
Physical Environment-Sunlight
Taiga Biome
40. Integrated system of species that are dependent upon one another for survival
Competition Same Niche 2
Nitrified
Hydrosphere
Community
41. Lichens and moss
Pioneer Organism
Mutualims
Competition
Tundra Plants
42. Any group of similar organisms that are capable of reproducing
Photic Zone
Niche
Primary Consumers
Species
43. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Saprophytes
Intertidal Zone
Deep-sea Organisms
Photic Zone
44. Determined by the same decisive factors-temperatures and rainfall
Nature of Biomes
Population
Substratum-pH
Cohesive Force
45. 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
Competition
Hypotonic
Rootlike holdfasts
Substratum-pH
46. Conserve water actively
Desert Plants
Food Web
Pelagic Zone
Nitrogen cycle 1
47. First to resettle a virgin area
Species
Scavengers
Pioneer Organism
Benthos
48. Include saprophytic organisms and organisms of decay
Lithosphere
Sere
Decomposer
Tundra Plants
49. Community in an ecological succession is identified by a dominant species
Hypotonic
Community
Sere
Epiphytes
50. The nitrogen locked up in the wastes and dead tissues is released by the action of the bacteria of decay - which convert the proteins into ammonia
Ecological Succession
Biome
Predators
Nitrogen Cycle 4