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Test your basic knowledge |
PCAT Biology Ecology
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Subjects
:
pcat
,
biology
Instructions:
Answer 50 questions in 15 minutes.
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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 that feed on secondary consumer
Hydrosphere
Rootlike holdfasts
Predators
Tertiary Consumers
2. Individuals belonging to the same species use the same resources and if a particular resource is limited - then these organisms must compete with one another
Carnivores
Nitrogen cycle 1
Intraspecific Interactions
Temperate Deciduous Forest Biome
3. Rock and soil surface
Littoral Zone
Abiotic (Physical) Environment
Lithosphere
Competition
4. The chief disruptive force
Competition
Abiotic (Physical) Environment
Temperate Coniferous Plants
Deep-sea Organisms
5. One that exerts control over the other species that are present
Conditions for stability in an Ecosystem
Nitrogen cycle 1
Temperate Deciduous Forest Animals
Dominant Species
6. Include reproduction and protection from predators and destructive weather
Predators
Pelagic Zone
Commensalism
Cohesive Force
7. Affect the type of vegetation that can be supported
Substratum-Minerals
Nitrogen cycle 1
Taiga Plants
Grassland Animals
8. Conserve water actively
Population
Commensalism
Desert Plants
Nitrified
9. Adaptations for maintaining their internal osmolarity and conserving water
Ecosystem
Carbon Cycle 2
Scavengers
Osmoregulation
10. Two fates await the ammonia (NH3). some are nitrified or dentrified
Climate and weather
Nitrogen Cycle 5
Omnivores
Physical Environment-Sunlight
11. Animals that consume only plants or plant foods
Nitrogen Cycle 3
Herbivores
Littoral Zone
Biotic Community
12. 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
Second Law of Thermodynamics
Photic zone
Temperate Coniferous Plants
Desert Biome
13. Developed long legs and many are hoofed
Heterotrophs
Niche
Grassland Animals
Lithosphere
14. 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
Competition Same Niche 2
Tundra Biome
Temperate Coniferous Plants
Food Web
15. Symbiotic relationship from which both organisms derive some benefit
Carbon Cycle 2
Mutualims
Environment
Intertidal Zone Population
16. 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
Saprophytes
Dentrified
Pyramid of Numbers
Temperate Deciduous Forest Animals
17. 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
Tropical Rain Forest Biome
Carnivores
Nitrogen Cycle 4
Community
18. Recycle water - oxygen - and phosphorus
Decomposer
Other Cycles
Carnivores
Biotic Environment
19. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Successive Communities
Producers
Communities
Aquatic Biomes
20. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Scavengers
Nature of Biomes
Heterotrophs
Ecological Succession
21. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Photic Zone
Nitrogen Cycle 2
Environmental Factors
Climax Community
22. Regiong beneatht he photic zone that receives no light
Aphotic Zone
Temperate Deciduous Forest Biome
Dentrified
Littoral Zone Populations
23. When one organism is benefited by the association and the other is not affected
Temperate Coniferous Plants
Commensalism
Substratum-Humus
Biotic Environment
24. Lichens and moss
Intertidal Zone
Communities
Tundra Plants
Climax Community
25. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Competition Same Niche 2
Poikilothermic (Cold Blooded)
Aphotic Zone
Polar Region
26. Composed of populations that are able to exist under the new conditions
Commensalism
Successive Communities
Aphotic Zone animals
Ecosystem
27. Includes climate - temperature - availability of light and water - and the local topology
Abiotic (Physical) Environment
Aphotic Zone
Omnivores
Cohesive Force
28. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Mutualims
Biotic Environment
Tropical Rain Forest Plants
Biotic Community
29. One or both organisms can't survive without the other
Environment
Food Chain
Obligatory
Desert Biome
30. Vegetation such as vines and eppiphytes
Tropical Rain Forest Plants
Marshes
Omnivores
Species
31. Consists of populations of different plants and animal species interacting with each other in a given environment
Biome
Marshes
Photic Zone animals
Communities
32. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Dentrified
Nature of Biomes
Desert animals
Omnivores
33. Determines the nature of plant and animal life in the soil
Epiphytes
Substratum (soil/rock)
Nature of Biomes
Nitrogen Cycle 4
34. Encompasses all that is external to the organism and is necessary for its existence
Environment
Polar Region
Taiga Plants
Ecological Succession
35. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Food Chain
Coimax Vegetatioin
Organism
Nitrogen Cycle 2
36. Community in an ecological succession is identified by a dominant species
Omnivores
Ecological Succession
Coimax Vegetatioin
Sere
37. Links between oceans and land
Desert Plants
Marshes
Substratum-Minerals
Grassland Biome
38. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Symbionts
Physical Environment-Temperature
Nitrogen
Producers
39. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Aphotic Zone animals
Nitrogen
Pyramid of Mass
Tundra Biome
40. 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
Niche
Temperate Deciduous Forest Biome
Conditions for stability in an Ecosystem
Biome
41. The major component of the internal environment of all living things
Pyramid of Energy
Physical Environment- Water
Carnivores
Competition Same Niche 2
42. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Saprophytes
Intertidal Zone Population
Marshes
Tundra Biome
43. Algae - crabs - crustacea - and many different species of fish
Substratum-Humus
Littoral Zone Populations
Nitrogen
Littoral Zone
44. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Primary Consumers
Photic Zone
Temperate Deciduous Forest Biome
Climax Community
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
Environment
Photic zone
Producers
Hypotonic
46. Rivers - lakes - ponds - and marshes
Primary Consumers
Conditions for stability in an Ecosystem
Substratum-Minerals
Freshwater Biomes
47. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Dentrified
Ecology
Intertidal Zone
Temperate Deciduous Forest Biome
48. Determined by the same decisive factors-temperatures and rainfall
Community
Nature of Biomes
Heterotrophs
Thundra Animals
49. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Temperate Deciduous Forest Animals
Carnivores
Tundra Plants
Pyramid of Numbers
50. Integrated system of species that are dependent upon one another for survival
Nitrified
Hydrosphere
Community
Population
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