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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. 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
Poikilothermic (Cold Blooded)
Carbon Cycle 2
Intertidal Zone
Niche
2. Composed of populations that are able to exist under the new conditions
Successive Communities
Grassland Biome
Temperate Coniferous Forest Biome
Photic zone
3. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Biotic Environment
Population
Successive Communities
Intertidal Zone
4. Group of organisms of the same species living together in a given location
Photic Zone animals
Hypotonic
Population
Grassland Animals
5. 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
Parasitism
Deep-sea Organisms
Grassland Biome
Nitrogen Cycle 3
6. Recycle water - oxygen - and phosphorus
Nitrogen Cycle 2
Nekton
Tundra Plants
Other Cycles
7. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Nitrogen Cycle 4
Temperate Coniferous Forest Biome
Nitrogen Cycle 2
Carbon Cycle 1
8. One or both organisms can't survive without the other
Physical Environment-Temperature
Marshes
Obligatory
Physical Environment-Sunlight
9. Determined by the same decisive factors-temperatures and rainfall
Nature of Biomes
Organism
Hydrosphere
Taiga Animals
10. 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
Poikilothermic (Cold Blooded)
Food Pyramids
Substratum-Minerals
Intraspecific Interactions
11. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Grassland Biome
Carbon Cycle 3
Communities
Tropical Rain Forest Animals
12. One that exerts control over the other species that are present
Osmoregulation
Dominant Species
Temperate Deciduous Forest Animals
Carbon Cycle 2
13. 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
Tropical Rain Forest Animals
Obligatory
Deep-sea Organisms
Hypotonic
14. When a parasite benefits at the expense of the host
Thundra Animals
Hemeothermic (Warm Blooded)
Climax Community
Parasitism
15. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Intraspecific Interactions
Obligatory
Carbon Cycle 2
Climax Community
16. Community in an ecological succession is identified by a dominant species
Polar Region
Poikilothermic (Cold Blooded)
Sere
Mutualims
17. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Organism
Other Cycles
Biotic Environment
Predator-Prey relationship
18. The oceans
Marine Biomes
Hydrosphere
Dominant Species
Tropical Rain Forest Biome
19. Integrated system of species that are dependent upon one another for survival
Community
Nitrogen cycle 1
Organism
Rootlike holdfasts
20. 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
Temperate Deciduous Forest Biome
Marshes
Carbon Cycle 3
Nitrogen
21. Region typical of the open seas and can be divided into photic and aphotic zones
Second Law of Thermodynamics
Pelagic Zone
Biotic Environment
Temperate Coniferous Forest Biome
22. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Organism
Intertidal Zone
Coimax Vegetatioin
Poikilothermic (Cold Blooded)
23. 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
Decomposer
Desert Biome
Biome
Climax Community
24. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Competition
Food Chain
Heterotrophs
Predator-Prey relationship
25. 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
Environmental Factors
Second Law of Thermodynamics
Heterotrophs
Autotrophs
26. Free-living organisms that feed on other living organisms
Taiga Plants
Sere
Ecosystem
Predators
27. Animals that consume primary consumers (carnivores)
Tropical Rain Forest Plants
Food Chain
Second Law of Thermodynamics
Secondary Consumers
28. Encompasses all that is external to the organism and is necessary for its existence
Environment
Littoral Zone
Herbivores
Littoral Zone Populations
29. The chief disruptive force
Temperate Deciduous Forest Plants
Competition Same Niche
Competition
Nitrogen Cycle 5
30. Links between oceans and land
Physical Environment- Water
Marshes
Climax Community
Competition
31. The ultimate source of energy for all organisms
Photic zone
Tundra Plants
Physical Environment-Sunlight
Marine Biomes
32. Determines the nature of plant and animal life in the soil
Lithosphere
Substratum (soil/rock)
Aphotic Zone animals
Herbivores
33. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Tundra Biome
Food Chain
Abiotic (Physical) Environment
Tundra Plants
34. Lichens and moss
Tundra Plants
Nitrogen Cycle 2
Epiphytes
Intertidal Zone
35. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Carbon Cycle 2
Mutualims
Climax Community
Temperate Deciduous Forest Biome
36. 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
Herbivores
Predator-Prey relationship
Commensalism
Temperate Coniferous Forest Biome
37. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Competition Same Niche 3
Competition Same Niche
Primary Consumers
Temperate Deciduous Forest Plants
38. Determine by the amount of decaying plant and animal life in the soil
Nekton
Nitrogen Cycle 5
Substratum-Humus
Material Cycles
39. Developed long legs and many are hoofed
Polar Region
Population
Grassland Animals
Symbionts
40. Two fates await the ammonia (NH3). some are nitrified or dentrified
Dominant Species
Niche
Nitrogen Cycle 5
Temperate Deciduous Forest Animals
41. Distinct community in a geographic region
Successive Communities
Intertidal Zone Population
Biome
Nekton
42. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Nitrogen
Nitrogen Cycle 5
Primary Consumers
Rootlike holdfasts
43. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Grassland Animals
Substratum-Humus
Biotic Environment
Hemeothermic (Warm Blooded)
44. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Epiphytes
Climax Community
Scavengers
Predator-Prey relationship
45. Sunlit layer of the open sea extending to a depth of 250-600ft
Desert animals
Commensalism
Littoral Zone
Photic zone
46. Includes the community and the environment and usually all five kingdoms
Temperate Deciduous Forest Animals
Climax Community
Ecosystem
Dominant Species
47. 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
Carnivores
Second Law of Thermodynamics
Photic Zone animals
Nitrogen cycle 1
48. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Grassland Biome
Desert animals
Nitrogen cycle 1
Marine Biomes
49. Affect the type of vegetation that can be supported
Substratum-Minerals
Poikilothermic (Cold Blooded)
Biotic Community
Tropical Rain Forest Biome
50. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Climate and weather
Successive Communities
Polar Region
Photic Zone animals