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
Grassland Animals
Food Pyramids
Primary Consumers
Rootlike holdfasts
2. 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
Other Cycles
Pelagic Zone
Food Chain
Tundra Biome
3. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Nitrogen Cycle 2
Tropical Rain Forest Plants
Osmoregulation
Freshwater Biomes
4. Any group of similar organisms that are capable of reproducing
Biotic Environment
Predators
Abiotic (Physical) Environment
Species
5. Forest floors contain moss and lichens
Taiga Plants
Saprophytes
Competition Same Niche 2
Desert Plants
6. The metabolically produced CO2 is released to the air. The rest of the orgnaic carbon remains locked whthin an organism until its death (except for wastes given off) - at which time decay processes by bacteria return the CO2 to the air
Material Cycles
Tropical Rain Forest Animals
Carbon Cycle 3
Rootlike holdfasts
7. Affect the type of vegetation that can be supported
Niche
Aphotic Zone
Taiga Biome
Substratum-Minerals
8. Animals that eat both plants and animals
Conditions for stability in an Ecosystem
Omnivores
Photic Zone
Hydrosphere
9. Community in an ecological succession is identified by a dominant species
Desert animals
Photic zone
Herbivores
Sere
10. Includes the community and the environment and usually all five kingdoms
Ecosystem
Niche
Substratum-pH
Hydrosphere
11. Encompasses all that is external to the organism and is necessary for its existence
Conditions for stability in an Ecosystem
Ecology
Polar Region
Environment
12. Algae - crabs - crustacea - and many different species of fish
Climate and weather
Parasitism
Photic Zone animals
Littoral Zone Populations
13. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Nitrogen
Hemeothermic (Warm Blooded)
Grassland Animals
Littoral Zone Populations
14. 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
Nitrogen Cycle 4
Taiga Biome
Tropical Rain Forest Animals
Aphotic Zone
15. Animals that consume green plants (herbivores)
Other Cycles
Nitrified
Primary Consumers
Physical Environment-Temperature
16. Food chain is not a simple linear chain but an intricate web
Biome
Tropical Rain Forest Plants
Abiotic (Physical) Environment
Food Web
17. Deer - fox - woodchuck - and squirrel
Omnivores
Pyramid of Mass
Coimax Vegetatioin
Temperate Deciduous Forest Animals
18. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Intertidal Zone
Climax Community
Communities
Nitrogen Cycle 2
19. Symbiotic relationship from which both organisms derive some benefit
Community
Tropical Rain Forest Animals
Physical Environment-Temperature
Mutualims
20. Integrated system of species that are dependent upon one another for survival
Nitrified
Community
Desert animals
Material Cycles
21. One or both organisms can't survive without the other
Grassland Animals
Obligatory
Substratum-Humus
Carbon Cycle 2
22. Crawling and sessile organsms
Predator-Prey relationship
Competition Same Niche 2
Hydrosphere
Benthos
23. Free-living organisms that feed on other living organisms
Physical Environment-Sunlight
Decomposer
Species
Predators
24. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Biotic Community
Saprophytes
Deep-sea Organisms
Heterotrophs
25. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Climax Community
Physical Environment- Water
Ecological Succession
Nitrified
26. The ultimate source of energy for all organisms
Pyramid of Numbers
Successive Communities
Taiga Biome
Physical Environment-Sunlight
27. The major component of the internal environment of all living things
Competition Same Niche 2
Physical Environment- Water
Climate and weather
Herbivores
28. 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
Tropical Rain Forest Biome
Food Chain
Littoral Zone Populations
29. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Carbon Cycle 2
Temperate Deciduous Forest Biome
Physical Environment-Sunlight
Substratum-texture
30. 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
Coimax Vegetatioin
Desert Biome
Aquatic Biomes
Food Pyramids
31. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Nitrogen Cycle 4
Intraspecific Interactions
Food Pyramids
Hemeothermic (Warm Blooded)
32. Group of organisms of the same species living together in a given location
Omnivores
Tropical Rain Forest Biome
Population
Food Pyramids
33. Conserve water actively
Photic Zone animals
Littoral Zone Populations
Desert Plants
Cohesive Force
34. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Polar Region
Desert animals
Temperate Deciduous Forest Animals
Tropical Rain Forest Animals
35. Recycle water - oxygen - and phosphorus
Other Cycles
Successive Communities
Second Law of Thermodynamics
Nitrogen
36. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Marshes
Physical Environment- Water
Pyramid of Numbers
Environmental Factors
37. Determine by the amount of decaying plant and animal life in the soil
Symbionts
Thundra Animals
Species
Substratum-Humus
38. Distinct community in a geographic region
Tundra Plants
Heterotrophs
Sere
Biome
39. Animals that consume only plants or plant foods
Organism
Environment
Herbivores
Dominant Species
40. 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
Desert animals
Saprophytes
Tertiary Consumers
Temperate Coniferous Forest Biome
41. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Parasitism
Photic Zone animals
Second Law of Thermodynamics
Competition
42. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Pyramid of Mass
Nitrogen Cycle 3
Aquatic Biomes
Food Pyramids
43. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Material Cycles
Temperate Deciduous Forest Plants
Carnivores
Ecological Succession
44. Sunlit layer of the open sea extending to a depth of 250-600ft
Grassland Biome
Tropical Rain Forest Plants
Photic Zone animals
Photic zone
45. 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
Competition Same Niche
Substratum-texture
46. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Sere
Physical Environment-Temperature
Secondary Consumers
Desert animals
47. Composed of populations that are able to exist under the new conditions
Successive Communities
Nekton
Coimax Vegetatioin
Nitrified
48. Needs constant energy source and cycling of materials between the living system
Nature of Biomes
Carbon Cycle 2
Conditions for stability in an Ecosystem
Producers
49. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Substratum-texture
Pyramid of Numbers
Intertidal Zone
Predator-Prey relationship
50. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Nitrified
Food Pyramids
Epiphytes
Aphotic Zone