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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. Adaptations for maintaining their internal osmolarity and conserving water
Population
Hypotonic
Tropical Rain Forest Plants
Osmoregulation
2. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Physical Environment- Water
Climax Community
Biotic Community
Aphotic Zone animals
3. Animals that consume primary consumers (carnivores)
Autotrophs
Secondary Consumers
Temperate Coniferous Forest Biome
Photic Zone
4. 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
Abiotic (Physical) Environment
Photic Zone
Taiga Animals
Desert Biome
5. Needs constant energy source and cycling of materials between the living system
Littoral Zone Populations
Saprophytes
Conditions for stability in an Ecosystem
Dominant Species
6. 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
Food Web
Population
Saprophytes
Rootlike holdfasts
7. Nekton and benthos - scavengers - and predators (fiercely competitive)
Carbon Cycle 2
Aquatic Biomes
Carnivores
Aphotic Zone animals
8. Animals that consume dead animals
Marshes
Parasitism
Desert animals
Scavengers
9. Links between oceans and land
Pyramid of Energy
Desert Plants
Producers
Marshes
10. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Tundra Plants
Mutualims
Marine Biomes
Substratum-texture
11. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Biosphere
Tropical Rain Forest Animals
Deep-sea Organisms
Symbionts
12. Group of organisms of the same species living together in a given location
Population
Intertidal Zone Population
Nitrogen
Benthos
13. Food chain is not a simple linear chain but an intricate web
Nitrogen Cycle 5
Hydrosphere
Food Web
Temperate Coniferous Plants
14. Determined by the same decisive factors-temperatures and rainfall
Littoral Zone Populations
Pyramid of Mass
Nature of Biomes
Dominant Species
15. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Intraspecific Interactions
Second Law of Thermodynamics
Nitrogen Cycle 3
Grassland Biome
16. One that exerts control over the other species that are present
Communities
Biotic Community
Ecosystem
Dominant Species
17. The study of interactions between organisms and their environment
Photic Zone animals
Ecology
Nitrogen Cycle 5
Littoral Zone
18. 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
Competition Same Niche
Communities
Substratum (soil/rock)
Nitrogen Cycle 4
19. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Nitrogen Cycle 2
Tundra Plants
Competition Same Niche 2
Ecosystem
20. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Nitrogen cycle 1
Desert animals
Temperate Deciduous Forest Animals
Symbionts
21. Include reproduction and protection from predators and destructive weather
Cohesive Force
Benthos
Scavengers
Carbon Cycle 2
22. Crawling and sessile organsms
Benthos
Aphotic Zone
Temperate Coniferous Forest Biome
Successive Communities
23. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Temperate Deciduous Forest Biome
Cohesive Force
Tertiary Consumers
Food Web
24. Integrated system of species that are dependent upon one another for survival
Population
Community
Tundra Plants
Poikilothermic (Cold Blooded)
25. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying
Dentrified
Grassland Animals
Predators
Cohesive Force
26. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Sere
Pyramid of Numbers
Nekton
Physical Environment- Water
27. 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
Littoral Zone
Marine Biomes
Tropical Rain Forest Plants
Temperate Coniferous Forest Biome
28. Composed of populations that are able to exist under the new conditions
Biosphere
Aphotic Zone animals
Successive Communities
Omnivores
29. 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
Dominant Species
Competition Same Niche 2
Nitrogen cycle 1
Taiga Biome
30. When one organism is benefited by the association and the other is not affected
Commensalism
Community
Polar Region
Ecological Succession
31. Determines the nature of plant and animal life in the soil
Temperate Deciduous Forest Animals
Symbionts
Aphotic Zone
Substratum (soil/rock)
32. Determine by the amount of decaying plant and animal life in the soil
Nitrogen Cycle 5
Nitrogen
Substratum-Humus
Substratum (soil/rock)
33. 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
Carbon Cycle 1
Intertidal Zone Population
Littoral Zone
Intraspecific Interactions
34. Sunlit layer of the open sea extending to a depth of 250-600ft
Climate and weather
Heterotrophs
Photic zone
Intertidal Zone
35. 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
Hypotonic
Substratum-Minerals
Conditions for stability in an Ecosystem
Commensalism
36. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Biotic Environment
Organism
Osmoregulation
Climate and weather
37. Rock and soil surface
Lithosphere
Biosphere
Communities
Substratum-pH
38. Animals that consume only plants or plant foods
Pyramid of Numbers
Herbivores
Obligatory
Physical Environment- Water
39. More than 70% of earth -plants have little controlling influence in communities -most stable ecosystems; the conditions affecting temperature - amount of available oxygen and cabon dioxide - and amount of suspended or dissolve materials are very stab
Ecological Succession
Substratum-pH
Intraspecific Interactions
Aquatic Biomes
40. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Nitrogen Cycle 4
Coimax Vegetatioin
Other Cycles
Tropical Rain Forest Biome
41. The oceans
Carbon Cycle 3
Hydrosphere
Epiphytes
Environmental Factors
42. Vegetation such as vines and eppiphytes
Intertidal Zone Population
Intraspecific Interactions
Tropical Rain Forest Plants
Taiga Animals
43. The vegetation that becomes dominant and stable after years of evolutiionary development
Temperate Deciduous Forest Animals
Pyramid of Mass
Coimax Vegetatioin
Nitrogen
44. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Hemeothermic (Warm Blooded)
Ecological Succession
Environmental Factors
Climate and weather
45. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Hemeothermic (Warm Blooded)
Benthos
Food Chain
Nitrogen
46. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Taiga Plants
Herbivores
Desert Plants
Hemeothermic (Warm Blooded)
47. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Rootlike holdfasts
Aphotic Zone
Material Cycles
Conditions for stability in an Ecosystem
48. Two fates await the ammonia (NH3). some are nitrified or dentrified
Temperate Coniferous Plants
Nitrogen Cycle 5
Nature of Biomes
Symbionts
49. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Heterotrophs
Communities
Pyramid of Numbers
Competition
50. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Photic Zone animals
Ecological Succession
Autotrophs
Nitrogen cycle 1
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