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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. 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
Substratum (soil/rock)
Environmental Factors
2. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Temperate Coniferous Plants
Parasitism
Biosphere
Hydrosphere
3. The major component of the internal environment of all living things
Physical Environment- Water
Climax Community
Producers
Carbon Cycle 3
4. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Littoral Zone
Pyramid of Numbers
Rootlike holdfasts
Benthos
5. Conserve water actively
Food Web
Carnivores
Desert Plants
Mutualims
6. When one organism is benefited by the association and the other is not affected
Carnivores
Commensalism
Temperate Deciduous Forest Plants
Coimax Vegetatioin
7. Recycle water - oxygen - and phosphorus
Predators
Decomposer
Carnivores
Other Cycles
8. Free-living organisms that feed on other living organisms
Ecological Succession
Physical Environment-Temperature
Predators
Communities
9. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Physical Environment-Temperature
Marine Biomes
Aquatic Biomes
Pelagic Zone
10. Any group of similar organisms that are capable of reproducing
Parasitism
Desert Biome
Nitrogen
Species
11. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Temperate Deciduous Forest Biome
Successive Communities
Epiphytes
Mutualims
12. Vegetation such as vines and eppiphytes
Tropical Rain Forest Plants
Littoral Zone Populations
Second Law of Thermodynamics
Temperate Coniferous Forest Biome
13. Regiong beneatht he photic zone that receives no light
Substratum-Humus
Aphotic Zone
Material Cycles
Communities
14. Symbiotic relationship from which both organisms derive some benefit
Scavengers
Photic zone
Mutualims
Nitrogen Cycle 2
15. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Substratum (soil/rock)
Obligatory
Material Cycles
Pelagic Zone
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
Secondary Consumers
Nature of Biomes
Desert Plants
Pyramid of Energy
17. Determine by the amount of decaying plant and animal life in the soil
Littoral Zone Populations
Nitrogen Cycle 3
Substratum-Humus
Temperate Coniferous Forest Biome
18. Forest floors contain moss and lichens
Predators
Aphotic Zone
Freshwater Biomes
Taiga Plants
19. Distinct community in a geographic region
Desert animals
Poikilothermic (Cold Blooded)
Temperate Deciduous Forest Biome
Biome
20. Algae - crabs - crustacea - and many different species of fish
Littoral Zone Populations
Littoral Zone
Secondary Consumers
Rootlike holdfasts
21. 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
Marshes
Nekton
Temperate Coniferous Forest Biome
Predators
22. Animals that consume only plants or plant foods
Niche
Substratum-Minerals
Herbivores
Nitrogen
23. Organisms that manufacture their own food
Autotrophs
Freshwater Biomes
Conditions for stability in an Ecosystem
Aphotic Zone
24. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Temperate Deciduous Forest Plants
Autotrophs
Dentrified
Tropical Rain Forest Biome
25. 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
Competition
Commensalism
Food Web
Food Pyramids
26. Crawling and sessile organsms
Symbionts
Benthos
Producers
Littoral Zone
27. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Cohesive Force
Hypotonic
Biotic Community
Environmental Factors
28. Composed of populations that are able to exist under the new conditions
Substratum (soil/rock)
Successive Communities
Pioneer Organism
Dentrified
29. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Autotrophs
Nitrified
Niche
Ecological Succession
30. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Abiotic (Physical) Environment
Tropical Rain Forest Animals
Scavengers
Population
31. Adaptations for maintaining their internal osmolarity and conserving water
Intertidal Zone Population
Osmoregulation
Predator-Prey relationship
Abiotic (Physical) Environment
32. Encompasses all that is external to the organism and is necessary for its existence
Food Web
Grassland Biome
Food Pyramids
Environment
33. 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
Nekton
Polar Region
Nitrogen Cycle 4
Dentrified
34. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Climate and weather
Pyramid of Mass
Niche
Hemeothermic (Warm Blooded)
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
Carnivores
Hydrosphere
Biotic Community
Species
36. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Coimax Vegetatioin
Hydrosphere
Photic Zone animals
Pyramid of Mass
37. The chief disruptive force
Pioneer Organism
Carbon Cycle 3
Competition
Dentrified
38. 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
Photic zone
Second Law of Thermodynamics
Pyramid of Numbers
Desert animals
39. 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
Nitrogen Cycle 3
Freshwater Biomes
Tropical Rain Forest Plants
Desert Biome
40. Animals that feed on secondary consumer
Biosphere
Material Cycles
Cohesive Force
Tertiary Consumers
41. One species may be competitively superior in some regions - and the other may be superior in other regions under different environmental conditions. this would result in the elimination of one species in some places and the other in other places
Aphotic Zone animals
Food Chain
Herbivores
Competition Same Niche 2
42. The oceans
Successive Communities
Decomposer
Taiga Biome
Hydrosphere
43. Nekton and benthos - scavengers - and predators (fiercely competitive)
Thundra Animals
Desert Plants
Aphotic Zone animals
Pelagic Zone
44. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Sere
Marine Biomes
Tundra Biome
Nekton
45. Include saprophytic organisms and organisms of decay
Sere
Decomposer
Nekton
Biotic Environment
46. Two fates await the ammonia (NH3). some are nitrified or dentrified
Nitrogen Cycle 5
Pyramid of Mass
Freshwater Biomes
Herbivores
47. The ultimate source of energy for all organisms
Nitrogen
Pelagic Zone
Physical Environment-Sunlight
Producers
48. One or both organisms can't survive without the other
Dentrified
Autotrophs
Carnivores
Obligatory
49. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Carbon Cycle 3
Littoral Zone
Pioneer Organism
Lithosphere
50. Community in an ecological succession is identified by a dominant species
Ecosystem
Sere
Pioneer Organism
Nitrogen cycle 1
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