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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. Adaptations for maintaining their internal osmolarity and conserving water
Parasitism
Photic Zone
Osmoregulation
Nitrogen cycle 1
2. When one organism is benefited by the association and the other is not affected
Temperate Deciduous Forest Biome
Commensalism
Organism
Poikilothermic (Cold Blooded)
3. The study of interactions between organisms and their environment
Scavengers
Food Web
Ecology
Carbon Cycle 3
4. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Biome
Population
Rootlike holdfasts
Poikilothermic (Cold Blooded)
5. 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
Organism
Carbon Cycle 2
Commensalism
6. 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
Symbionts
Intraspecific Interactions
Grassland Biome
Competition Same Niche
7. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Second Law of Thermodynamics
Tropical Rain Forest Plants
Climax Community
Material Cycles
8. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Aphotic Zone
Ecological Succession
Epiphytes
Communities
9. 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
Food Pyramids
Taiga Biome
Epiphytes
Polar Region
10. 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
Pyramid of Energy
Physical Environment-Temperature
Substratum-Minerals
Osmoregulation
11. Include saprophytic organisms and organisms of decay
Intertidal Zone
Marine Biomes
Substratum (soil/rock)
Decomposer
12. 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
Epiphytes
Tundra Plants
Temperate Coniferous Forest Biome
Pyramid of Energy
13. Consists of populations of different plants and animal species interacting with each other in a given environment
Nitrogen cycle 1
Communities
Environmental Factors
Desert Plants
14. The oceans
Omnivores
Hydrosphere
Environmental Factors
Tundra Plants
15. Affect the type of vegetation that can be supported
Substratum-Minerals
Nekton
Food Web
Competition Same Niche
16. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Environment
Freshwater Biomes
Photic Zone animals
Substratum-Humus
17. 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
Parasitism
Climate and weather
Carbon Cycle 2
Material Cycles
18. 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
Tundra Plants
Aquatic Biomes
Pioneer Organism
Tropical Rain Forest Plants
19. One that exerts control over the other species that are present
Freshwater Biomes
Community
Aphotic Zone animals
Dominant Species
20. Only animal life and other heterotrophic life exists
Biotic Environment
Aphotic Zone
Ecological Succession
Substratum-pH
21. Symbiotic relationship from which both organisms derive some benefit
Mutualims
Carbon Cycle 1
Biotic Environment
Food Pyramids
22. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Deep-sea Organisms
Producers
Pyramid of Mass
Ecosystem
23. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Substratum-pH
Hemeothermic (Warm Blooded)
Nitrogen cycle 1
Environment
24. 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
Osmoregulation
Nitrogen Cycle 3
Littoral Zone Populations
25. 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
Species
Aphotic Zone animals
Niche
Competition Same Niche 3
26. Regiong beneatht he photic zone that receives no light
Aphotic Zone
Hydrosphere
Physical Environment-Temperature
Scavengers
27. Polar bears - musk oxen - and arctic hens
Dominant Species
Successive Communities
Pioneer Organism
Thundra Animals
28. Crawling and sessile organsms
Benthos
Littoral Zone Populations
Deep-sea Organisms
Substratum-pH
29. Animals that eat both plants and animals
Abiotic (Physical) Environment
Successive Communities
Omnivores
Aquatic Biomes
30. Rivers - lakes - ponds - and marshes
Nitrogen Cycle 5
Freshwater Biomes
Ecological Succession
Rootlike holdfasts
31. Two fates await the ammonia (NH3). some are nitrified or dentrified
Nitrogen Cycle 5
Conditions for stability in an Ecosystem
Polar Region
Carbon Cycle 1
32. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Environmental Factors
Temperate Deciduous Forest Biome
Deep-sea Organisms
Desert Biome
33. The chief disruptive force
Temperate Deciduous Forest Animals
Physical Environment-Temperature
Competition
Marine Biomes
34. Rock and soil surface
Lithosphere
Substratum-pH
Symbionts
Thundra Animals
35. Needs constant energy source and cycling of materials between the living system
Primary Consumers
Desert animals
Conditions for stability in an Ecosystem
Biotic Environment
36. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Tundra Biome
Taiga Animals
Temperate Coniferous Plants
Food Chain
37. 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
Second Law of Thermodynamics
Carbon Cycle 1
Marine Biomes
Physical Environment-Temperature
38. 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
Grassland Animals
Environment
Primary Consumers
39. Recycle water - oxygen - and phosphorus
Other Cycles
Secondary Consumers
Deep-sea Organisms
Carbon Cycle 2
40. Rhododendrons and pines are more suited for growth in acid oil
Competition Same Niche 2
Taiga Animals
Substratum-pH
Poikilothermic (Cold Blooded)
41. 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
Epiphytes
Desert Biome
Abiotic (Physical) Environment
Biotic Environment
42. Distinct community in a geographic region
Biome
Carnivores
Aphotic Zone
Species
43. 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
Freshwater Biomes
Coimax Vegetatioin
Competition Same Niche 3
Biosphere
44. Any group of similar organisms that are capable of reproducing
Species
Predator-Prey relationship
Nitrogen Cycle 5
Tropical Rain Forest Plants
45. Free-living organisms that feed on other living organisms
Scavengers
Osmoregulation
Predators
Omnivores
46. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Organism
Sere
Autotrophs
Hydrosphere
47. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Ecological Succession
Substratum-pH
Tropical Rain Forest Biome
Carbon Cycle 1
48. Include reproduction and protection from predators and destructive weather
Food Chain
Cohesive Force
Material Cycles
Marine Biomes
49. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival
Biosphere
Predator-Prey relationship
Deep-sea Organisms
Substratum-pH
50. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Producers
Epiphytes
Heterotrophs
Biosphere