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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. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Ecosystem
Predator-Prey relationship
Nekton
Second Law of Thermodynamics
2. The study of interactions between organisms and their environment
Ecology
Hemeothermic (Warm Blooded)
Osmoregulation
Niche
3. 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
Nitrogen cycle 1
Littoral Zone Populations
Physical Environment- Water
Competition Same Niche 3
4. Rock and soil surface
Carnivores
Nitrogen Cycle 4
Lithosphere
Poikilothermic (Cold Blooded)
5. When a parasite benefits at the expense of the host
Aphotic Zone
Nitrogen
Commensalism
Parasitism
6. 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
Pioneer Organism
Carnivores
Desert animals
Desert Biome
7. Animals that consume only plants or plant foods
Littoral Zone Populations
Other Cycles
Herbivores
Osmoregulation
8. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Environment
Tropical Rain Forest Biome
Parasitism
Decomposer
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
Saprophytes
Physical Environment- Water
Autotrophs
Desert Plants
10. The chief disruptive force
Organism
Substratum (soil/rock)
Successive Communities
Competition
11. 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
Primary Consumers
Thundra Animals
Poikilothermic (Cold Blooded)
Intraspecific Interactions
12. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Successive Communities
Second Law of Thermodynamics
Competition Same Niche 2
Material Cycles
13. Rhododendrons and pines are more suited for growth in acid oil
Substratum-Minerals
Abiotic (Physical) Environment
Substratum-pH
Commensalism
14. Include reproduction and protection from predators and destructive weather
Hypotonic
Ecology
Cohesive Force
Competition Same Niche 3
15. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Photic zone
Ecological Succession
Pelagic Zone
Temperate Deciduous Forest Plants
16. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Sere
Littoral Zone Populations
Tropical Rain Forest Animals
Competition
17. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Substratum-Minerals
Mutualims
Nitrogen Cycle 3
18. 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
Organism
Niche
Producers
Marine Biomes
19. Sunlit layer of the open sea extending to a depth of 250-600ft
Photic Zone animals
Ecosystem
Photic zone
Climate and weather
20. One species may be competitively superior to the other and drive the second to extinction
Food Pyramids
Competition Same Niche
Coimax Vegetatioin
Primary Consumers
21. The oceans
Tundra Plants
Pelagic Zone
Physical Environment-Sunlight
Hydrosphere
22. Group of organisms of the same species living together in a given location
Ecology
Desert animals
Intertidal Zone Population
Population
23. Consists of populations of different plants and animal species interacting with each other in a given environment
Desert Plants
Substratum-Minerals
Communities
Predators
24. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Carbon Cycle 1
Pioneer Organism
Nitrogen Cycle 2
Producers
25. First to resettle a virgin area
Pioneer Organism
Nitrogen Cycle 4
Second Law of Thermodynamics
Taiga Animals
26. Encompasses all that is external to the organism and is necessary for its existence
Tropical Rain Forest Plants
Tundra Biome
Environment
Carbon Cycle 2
27. Used to include only the population and not their physical environment
Physical Environment-Temperature
Temperate Coniferous Plants
Biotic Community
Tropical Rain Forest Animals
28. Algae - crabs - crustacea - and many different species of fish
Symbionts
Competition Same Niche 3
Littoral Zone Populations
Sere
29. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Environmental Factors
Grassland Biome
Temperate Coniferous Plants
Littoral Zone Populations
30. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Tropical Rain Forest Biome
Climax Community
Taiga Biome
Communities
31. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Aphotic Zone
Heterotrophs
Pioneer Organism
Intraspecific Interactions
32. Animals that eat both plants and animals
Omnivores
Carbon Cycle 1
Biotic Environment
Hemeothermic (Warm Blooded)
33. 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
Material Cycles
Heterotrophs
Food Pyramids
Conditions for stability in an Ecosystem
34. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Physical Environment-Temperature
Ecosystem
Substratum (soil/rock)
Hemeothermic (Warm Blooded)
35. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Epiphytes
Food Web
Poikilothermic (Cold Blooded)
Substratum-Humus
36. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Desert animals
Freshwater Biomes
Nitrogen Cycle 5
37. Forest floors contain moss and lichens
Nitrogen
Hydrosphere
Polar Region
Taiga Plants
38. Crawling and sessile organsms
Ecology
Nature of Biomes
Deep-sea Organisms
Benthos
39. Animals eat plants and use the digested nutrients to form carbohydrates - fats - and proteins characteristic of the species. a part of these organic compounds is used as fuel in respiration in plants and animals
Temperate Deciduous Forest Animals
Scavengers
Omnivores
Carbon Cycle 2
40. 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
Second Law of Thermodynamics
Substratum-pH
Ecosystem
Taiga Biome
41. 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
Pyramid of Mass
Hydrosphere
Second Law of Thermodynamics
Communities
42. Adaptations for maintaining their internal osmolarity and conserving water
Substratum (soil/rock)
Osmoregulation
Temperate Deciduous Forest Biome
Commensalism
43. Affect the type of vegetation that can be supported
Substratum-Minerals
Tundra Plants
Producers
Saprophytes
44. Two species may rapidly evolve in divergent directions under the strong selection pressure resulting from intense competition. thus - the two species would rapidly evolve greater differences in their niches
Lithosphere
Competition Same Niche 3
Tropical Rain Forest Animals
Desert Plants
45. Free-living organisms that feed on other living organisms
Autotrophs
Lithosphere
Osmoregulation
Predators
46. 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
Competition Same Niche 2
Pelagic Zone
Nitrogen
Other Cycles
47. 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
Nitrogen Cycle 4
Dominant Species
Lithosphere
Tundra Biome
48. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Photic Zone
Biome
Nitrogen Cycle 2
Nitrogen Cycle 4
49. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Obligatory
Epiphytes
Mutualims
Decomposer
50. Polar bears - musk oxen - and arctic hens
Photic Zone
Dominant Species
Commensalism
Thundra Animals