SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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. Animals that consume dead animals
Scavengers
Osmoregulation
Tundra Biome
Tropical Rain Forest Biome
2. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active
Poikilothermic (Cold Blooded)
Littoral Zone
Physical Environment- Water
Polar Region
3. Sunlit layer of the open sea extending to a depth of 250-600ft
Autotrophs
Tertiary Consumers
Photic zone
Food Chain
4. Lichens and moss
Omnivores
Autotrophs
Competition Same Niche 3
Tundra Plants
5. Determines the nature of plant and animal life in the soil
Aphotic Zone animals
Desert animals
Species
Substratum (soil/rock)
6. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria
Tundra Plants
Temperate Deciduous Forest Biome
Organism
Nitrified
7. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Dominant Species
Nitrogen Cycle 2
Physical Environment-Sunlight
Climate and weather
8. 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
Taiga Biome
Communities
Hypotonic
Marshes
9. Needs constant energy source and cycling of materials between the living system
Conditions for stability in an Ecosystem
Biome
Intertidal Zone
Competition Same Niche 2
10. The ultimate source of energy for all organisms
Carbon Cycle 2
Carbon Cycle 3
Carbon Cycle 1
Physical Environment-Sunlight
11. Community in an ecological succession is identified by a dominant species
Sere
Population
Grassland Biome
Tropical Rain Forest Biome
12. Rivers - lakes - ponds - and marshes
Freshwater Biomes
Osmoregulation
Abiotic (Physical) Environment
Scavengers
13. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition
Community
Biotic Community
Conditions for stability in an Ecosystem
Food Chain
14. Animals that consume green plants (herbivores)
Primary Consumers
Competition Same Niche 3
Substratum-Minerals
Intraspecific Interactions
15. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Nitrogen Cycle 4
Material Cycles
Tertiary Consumers
Hypotonic
16. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Community
Biosphere
Nitrogen cycle 1
Substratum-Humus
17. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Heterotrophs
Taiga Animals
Pyramid of Mass
Temperate Deciduous Forest Biome
18. When a parasite benefits at the expense of the host
Temperate Coniferous Forest Biome
Community
Physical Environment-Sunlight
Parasitism
19. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Nitrogen Cycle 3
Heterotrophs
Nitrogen cycle 1
Photic Zone
20. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Nitrogen Cycle 2
Biome
Epiphytes
Photic Zone animals
21. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Substratum-Minerals
Tertiary Consumers
Biotic Community
Deep-sea Organisms
22. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Ecological Succession
Intertidal Zone
Temperate Coniferous Forest Biome
Desert Plants
23. One or both organisms can't survive without the other
Successive Communities
Saprophytes
Biome
Obligatory
24. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Nitrogen Cycle 3
Poikilothermic (Cold Blooded)
Rootlike holdfasts
Autotrophs
25. Determines water holding capacity
Ecology
Polar Region
Littoral Zone Populations
Substratum-texture
26. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae
Pyramid of Energy
Desert Biome
Photic Zone animals
Hemeothermic (Warm Blooded)
27. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Pyramid of Mass
Nitrogen Cycle 4
Tundra Plants
Tropical Rain Forest Animals
28. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Hemeothermic (Warm Blooded)
Herbivores
Competition Same Niche 2
Food Web
29. Animals that eat both plants and animals
Obligatory
Littoral Zone Populations
Omnivores
Nekton
30. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Temperate Coniferous Plants
Tertiary Consumers
Pyramid of Numbers
Taiga Biome
31. 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
Tropical Rain Forest Biome
Osmoregulation
Material Cycles
32. Adaptations for maintaining their internal osmolarity and conserving water
Community
Tundra Plants
Osmoregulation
Physical Environment- Water
33. One species may be competitively superior to the other and drive the second to extinction
Abiotic (Physical) Environment
Physical Environment- Water
Taiga Plants
Competition Same Niche
34. Composed of populations that are able to exist under the new conditions
Temperate Coniferous Forest Biome
Environment
Successive Communities
Marine Biomes
35. Freshwater Biomes vs. Saltwater 3: Freshwater biomes - except very large lakes - are affected by variations in _________. temperature of freshwater bodies varies considerably; they may freeze or dry up - and mud from their floors may be stirred up by
Climate and weather
Desert Biome
Sere
Material Cycles
36. Integrated system of species that are dependent upon one another for survival
Community
Aphotic Zone
Biome
Heterotrophs
37. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans
Taiga Animals
Polar Region
Temperate Deciduous Forest Biome
Scavengers
38. First to resettle a virgin area
Nitrogen Cycle 5
Pioneer Organism
Producers
Littoral Zone
39. 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
Competition Same Niche 2
Intraspecific Interactions
Hydrosphere
Aphotic Zone
40. The metabolically produced CO2 is released to the air. The rest of the orgnaic carbon remains locked whthin an organism until its death (except for wastes given off) - at which time decay processes by bacteria return the CO2 to the air
Carbon Cycle 3
Littoral Zone
Desert Biome
Climax Community
41. Vegetation has evolved adaptations for water conservation such as needle shaped leaves
Desert animals
Population
Temperate Coniferous Plants
Biosphere
42. Deer - fox - woodchuck - and squirrel
Ecology
Temperate Deciduous Forest Animals
Commensalism
Temperate Coniferous Forest Biome
43. Includes the community and the environment and usually all five kingdoms
Ecosystem
Autotrophs
Temperate Deciduous Forest Plants
Tropical Rain Forest Biome
44. 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
Deep-sea Organisms
Mutualims
Desert Biome
Carbon Cycle 1
45. 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
Tundra Plants
Tropical Rain Forest Plants
Temperate Coniferous Plants
Grassland Biome
46. Rock and soil surface
Temperate Deciduous Forest Animals
Lithosphere
Marine Biomes
Tundra Biome
47. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes
Benthos
Physical Environment-Temperature
Commensalism
Environmental Factors
48. Determine by the amount of decaying plant and animal life in the soil
Substratum-Humus
Substratum (soil/rock)
Tropical Rain Forest Animals
Producers
49. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms
Thundra Animals
Biotic Environment
Commensalism
Abiotic (Physical) Environment
50. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Successive Communities
Environment
Sere
Climax Community