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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. 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
Temperate Coniferous Forest Biome
Hydrosphere
Symbionts
Taiga Biome
2. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Littoral Zone
Carbon Cycle 3
Decomposer
Nitrogen Cycle 5
3. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Taiga Plants
Carnivores
Aphotic Zone
Nitrogen Cycle 2
4. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Pyramid of Numbers
Material Cycles
Competition Same Niche 3
Carnivores
5. Algae - crabs - crustacea - and many different species of fish
Herbivores
Littoral Zone Populations
Tropical Rain Forest Animals
Taiga Plants
6. Determined by the same decisive factors-temperatures and rainfall
Nature of Biomes
Tundra Plants
Carnivores
Photic zone
7. 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
Climate and weather
Food Pyramids
Taiga Plants
Rootlike holdfasts
8. 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
Deep-sea Organisms
Species
Temperate Deciduous Forest Biome
Aquatic Biomes
9. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Nitrogen
Aphotic Zone animals
Taiga Animals
Biosphere
10. Community in an ecological succession is identified by a dominant species
Dominant Species
Carbon Cycle 3
Sere
Thundra Animals
11. When one organism is benefited by the association and the other is not affected
Commensalism
Saprophytes
Desert animals
Grassland Biome
12. Any group of similar organisms that are capable of reproducing
Tropical Rain Forest Biome
Species
Substratum-Minerals
Food Pyramids
13. Determines water holding capacity
Carbon Cycle 3
Successive Communities
Substratum-texture
Autotrophs
14. Composed of populations that are able to exist under the new conditions
Successive Communities
Competition Same Niche 3
Aphotic Zone
Photic Zone
15. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Carbon Cycle 2
Substratum-pH
Hemeothermic (Warm Blooded)
Tropical Rain Forest Biome
16. 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
Pyramid of Energy
Niche
Dominant Species
17. Conserve water actively
Grassland Biome
Desert Plants
Secondary Consumers
Omnivores
18. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Marine Biomes
Tropical Rain Forest Biome
Heterotrophs
Substratum-pH
19. Animals that eat both plants and animals
Substratum-Minerals
Nekton
Nitrogen Cycle 4
Omnivores
20. Region typical of the open seas and can be divided into photic and aphotic zones
Pelagic Zone
Osmoregulation
Secondary Consumers
Thundra Animals
21. 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
Successive Communities
Intraspecific Interactions
Pelagic Zone
Climate and weather
22. 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
Ecosystem
Herbivores
Niche
Predator-Prey relationship
23. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Second Law of Thermodynamics
Omnivores
Aphotic Zone
Temperate Deciduous Forest Plants
24. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Pyramid of Numbers
Benthos
Photic Zone animals
Temperate Coniferous Forest Biome
25. Symbiotic relationship from which both organisms derive some benefit
Taiga Animals
Photic Zone
Desert animals
Mutualims
26. 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
Tropical Rain Forest Biome
Desert Biome
Predators
Primary Consumers
27. Rivers - lakes - ponds - and marshes
Niche
Primary Consumers
Tropical Rain Forest Plants
Freshwater Biomes
28. Forest floors contain moss and lichens
Biome
Taiga Plants
Food Web
Intertidal Zone
29. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe
Substratum-Minerals
Grassland Animals
Temperate Deciduous Forest Biome
Saprophytes
30. Determines the nature of plant and animal life in the soil
Hydrosphere
Hemeothermic (Warm Blooded)
Grassland Biome
Substratum (soil/rock)
31. Animals that feed on secondary consumer
Tertiary Consumers
Community
Tundra Plants
Sere
32. Animals that consume primary consumers (carnivores)
Secondary Consumers
Tropical Rain Forest Animals
Abiotic (Physical) Environment
Nitrified
33. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Thundra Animals
Biosphere
Secondary Consumers
Photic Zone
34. 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
Symbionts
Food Pyramids
Food Chain
Niche
35. Organisms that manufacture their own food
Osmoregulation
Autotrophs
Nekton
Lithosphere
36. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Grassland Animals
Deep-sea Organisms
Secondary Consumers
Epiphytes
37. 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
Taiga Biome
Grassland Animals
Symbionts
Food Web
38. The oceans
Carnivores
Sere
Hydrosphere
Photic Zone
39. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Environmental Factors
Marine Biomes
Hemeothermic (Warm Blooded)
Intertidal Zone Population
40. 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
Symbionts
Second Law of Thermodynamics
Freshwater Biomes
Carnivores
41. Needs constant energy source and cycling of materials between the living system
Substratum (soil/rock)
Environment
Substratum-pH
Conditions for stability in an Ecosystem
42. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Littoral Zone
Freshwater Biomes
Symbionts
Substratum-Minerals
43. Animals that consume green plants (herbivores)
Second Law of Thermodynamics
Tertiary Consumers
Primary Consumers
Climate and weather
44. 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
Ecosystem
Competition Same Niche 2
Successive Communities
45. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Freshwater Biomes
Tropical Rain Forest Animals
Substratum-Humus
Thundra Animals
46. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Nitrified
Population
Food Web
Conditions for stability in an Ecosystem
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
Conditions for stability in an Ecosystem
Pyramid of Mass
Saprophytes
Nitrogen cycle 1
48. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Polar Region
Nitrogen Cycle 4
Lithosphere
Pioneer Organism
49. 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
Biosphere
Biotic Environment
Saprophytes
Dominant Species
50. Recycle water - oxygen - and phosphorus
Omnivores
Saprophytes
Substratum (soil/rock)
Other Cycles