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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. 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
Intertidal Zone
Aphotic Zone animals
Dominant Species
Aquatic Biomes
2. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Hypotonic
Ecosystem
Climax Community
Marine Biomes
3. The ultimate source of energy for all organisms
Polar Region
Epiphytes
Food Chain
Physical Environment-Sunlight
4. Animals that eat both plants and animals
Predator-Prey relationship
Omnivores
Substratum-texture
Substratum (soil/rock)
5. One that exerts control over the other species that are present
Organism
Dominant Species
Producers
Heterotrophs
6. 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
Polar Region
Rootlike holdfasts
Taiga Biome
Temperate Deciduous Forest Plants
7. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Pioneer Organism
Producers
Intertidal Zone
Nitrogen Cycle 4
8. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Organism
Tertiary Consumers
Nitrogen Cycle 3
Carbon Cycle 2
9. 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
Heterotrophs
Ecology
Coimax Vegetatioin
Saprophytes
10. 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
Taiga Plants
Hemeothermic (Warm Blooded)
Temperate Coniferous Forest Biome
11. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Aphotic Zone animals
Taiga Plants
Photic Zone
Temperate Deciduous Forest Plants
12. Algae - crabs - crustacea - and many different species of fish
Desert Biome
Littoral Zone Populations
Mutualims
Carbon Cycle 3
13. First to resettle a virgin area
Tundra Plants
Taiga Plants
Physical Environment- Water
Pioneer Organism
14. Gaseous CO2 enters the living world when plants use it to produce glucose via photosynthesis. The carbon atoms in CO2 are bonded to hydrogen and other carbon atoms. the plant uses the glucose to make starch - proteins - and fat
Nitrogen Cycle 4
Commensalism
Carbon Cycle 1
Ecosystem
15. Animals that consume only plants or plant foods
Producers
Conditions for stability in an Ecosystem
Population
Herbivores
16. Recycle water - oxygen - and phosphorus
Other Cycles
Cohesive Force
Abiotic (Physical) Environment
Producers
17. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Heterotrophs
Food Chain
Aquatic Biomes
Pioneer Organism
18. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Epiphytes
Intertidal Zone
Poikilothermic (Cold Blooded)
Environmental Factors
19. The oceans
Photic Zone animals
Taiga Plants
Conditions for stability in an Ecosystem
Hydrosphere
20. Deer - fox - woodchuck - and squirrel
Temperate Deciduous Forest Animals
Aphotic Zone animals
Taiga Plants
Saprophytes
21. Sunlit layer of the open sea extending to a depth of 250-600ft
Nitrogen Cycle 5
Biotic Environment
Grassland Biome
Photic zone
22. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Second Law of Thermodynamics
Substratum-pH
Substratum-Humus
23. 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
Taiga Animals
Tundra Biome
Temperate Coniferous Forest Biome
Grassland Animals
24. When a parasite benefits at the expense of the host
Ecological Succession
Thundra Animals
Parasitism
Tropical Rain Forest Plants
25. Animals that feed on secondary consumer
Tertiary Consumers
Nitrogen cycle 1
Parasitism
Tundra Biome
26. Community in an ecological succession is identified by a dominant species
Pioneer Organism
Sere
Thundra Animals
Tundra Biome
27. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Biosphere
Climax Community
Desert Plants
Hemeothermic (Warm Blooded)
28. 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
Food Pyramids
Intraspecific Interactions
Substratum-pH
Substratum-texture
29. Rivers - lakes - ponds - and marshes
Freshwater Biomes
Intertidal Zone
Environmental Factors
Autotrophs
30. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Dominant Species
Substratum-Humus
Conditions for stability in an Ecosystem
Photic Zone animals
31. 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
Aphotic Zone animals
Grassland Biome
Carnivores
Niche
32. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Autotrophs
Carnivores
Tropical Rain Forest Animals
Osmoregulation
33. Two fates await the ammonia (NH3). some are nitrified or dentrified
Photic Zone animals
Climate and weather
Autotrophs
Nitrogen Cycle 5
34. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Nitrified
Substratum-texture
Littoral Zone Populations
Community
35. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Temperate Coniferous Plants
Substratum (soil/rock)
Taiga Animals
Species
36. 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
Competition
Niche
Grassland Animals
Pyramid of Energy
37. Forest floors contain moss and lichens
Tundra Biome
Taiga Plants
Commensalism
Temperate Coniferous Plants
38. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Ecology
Poikilothermic (Cold Blooded)
Nitrified
Autotrophs
39. Developed long legs and many are hoofed
Tropical Rain Forest Plants
Grassland Animals
Material Cycles
Littoral Zone
40. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Biosphere
Omnivores
Species
Predators
41. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Pyramid of Energy
Tropical Rain Forest Plants
Aquatic Biomes
Nitrogen Cycle 2
42. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Food Pyramids
Carbon Cycle 1
Species
43. 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
Intraspecific Interactions
Other Cycles
Communities
Poikilothermic (Cold Blooded)
44. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Mutualims
Predator-Prey relationship
Taiga Animals
Temperate Coniferous Plants
45. Because organisms at the upper levels of the food chain derive their food energy from organisms at lower levels - and because energy is lost from one level to the next - each level can support a successively smaller biomass
Nitrogen Cycle 2
Nitrogen cycle 1
Pyramid of Mass
Temperate Coniferous Forest Biome
46. Encompasses all that is external to the organism and is necessary for its existence
Environment
Intertidal Zone
Taiga Plants
Environmental Factors
47. Animals that consume primary consumers (carnivores)
Secondary Consumers
Pyramid of Energy
Grassland Animals
Community
48. Rhododendrons and pines are more suited for growth in acid oil
Temperate Coniferous Forest Biome
Pelagic Zone
Substratum-pH
Nature of Biomes
49. Only animal life and other heterotrophic life exists
Aphotic Zone
Heterotrophs
Pyramid of Mass
Photic Zone animals
50. Determined by the same decisive factors-temperatures and rainfall
Successive Communities
Marine Biomes
Substratum (soil/rock)
Nature of Biomes