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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. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes
Physical Environment- Water
Tropical Rain Forest Animals
Ecosystem
Climax Community
2. 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
Competition Same Niche 3
Predator-Prey relationship
Desert Biome
Tropical Rain Forest Biome
3. Includes the community and the environment and usually all five kingdoms
Pelagic Zone
Temperate Coniferous Plants
Ecosystem
Littoral Zone Populations
4. The nitrogen locked up in the wastes and dead tissues is released by the action of the bacteria of decay - which convert the proteins into ammonia
Temperate Deciduous Forest Biome
Competition Same Niche
Nitrogen Cycle 4
Biotic Environment
5. 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
Parasitism
Aquatic Biomes
Food Chain
Cohesive Force
6. Nekton and benthos - scavengers - and predators (fiercely competitive)
Dentrified
Predators
Aphotic Zone animals
Hydrosphere
7. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia
Tropical Rain Forest Biome
Competition Same Niche
Biosphere
Substratum-pH
8. 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
Heterotrophs
Intraspecific Interactions
Successive Communities
Tropical Rain Forest Animals
9. Animals that consume primary consumers (carnivores)
Secondary Consumers
Commensalism
Desert Plants
Dentrified
10. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Littoral Zone Populations
Nitrogen Cycle 3
Littoral Zone
Climate and weather
11. Consists of populations of different plants and animal species interacting with each other in a given environment
Communities
Aquatic Biomes
Substratum-texture
Tertiary Consumers
12. Includes climate - temperature - availability of light and water - and the local topology
Abiotic (Physical) Environment
Aquatic Biomes
Carbon Cycle 2
Scavengers
13. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Tropical Rain Forest Animals
Physical Environment-Sunlight
Material Cycles
Symbionts
14. Integrated system of species that are dependent upon one another for survival
Obligatory
Community
Photic Zone
Desert Plants
15. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Producers
Nitrogen
Aphotic Zone
Biosphere
16. The oceans
Hydrosphere
Rootlike holdfasts
Carbon Cycle 3
Temperate Deciduous Forest Animals
17. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Climax Community
Competition Same Niche 3
Ecology
Nitrogen Cycle 3
18. Animals that eat both plants and animals
Carbon Cycle 3
Omnivores
Osmoregulation
Successive Communities
19. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Climate and weather
Heterotrophs
Nitrogen Cycle 2
Pyramid of Numbers
20. Conserve water actively
Substratum-Humus
Deep-sea Organisms
Biome
Desert Plants
21. Distinct community in a geographic region
Biome
Tundra Biome
Successive Communities
Pelagic Zone
22. The chief disruptive force
Community
Desert Plants
Grassland Biome
Competition
23. Developed long legs and many are hoofed
Grassland Animals
Polar Region
Nitrified
Other Cycles
24. Rhododendrons and pines are more suited for growth in acid oil
Photic Zone animals
Omnivores
Herbivores
Substratum-pH
25. One or both organisms can't survive without the other
Obligatory
Intertidal Zone Population
Taiga Biome
Physical Environment-Temperature
26. Encompasses all that is external to the organism and is necessary for its existence
Environment
Species
Decomposer
Substratum (soil/rock)
27. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Deep-sea Organisms
Substratum-Minerals
Carbon Cycle 3
Biotic Community
28. 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
Osmoregulation
Food Pyramids
Nitrogen cycle 1
Desert Biome
29. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Substratum-Minerals
Marshes
Biosphere
Marine Biomes
30. One that exerts control over the other species that are present
Physical Environment-Temperature
Dominant Species
Herbivores
Dentrified
31. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish
Dominant Species
Benthos
Desert Biome
Nekton
32. 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
Species
Niche
Substratum-pH
33. Community in an ecological succession is identified by a dominant species
Environmental Factors
Sere
Carbon Cycle 1
Competition Same Niche 2
34. Food chain is not a simple linear chain but an intricate web
Aphotic Zone animals
Food Web
Carbon Cycle 2
Physical Environment-Temperature
35. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Environment
Organism
Decomposer
Osmoregulation
36. First to resettle a virgin area
Ecology
Taiga Animals
Pioneer Organism
Substratum-pH
37. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food
Taiga Plants
Successive Communities
Aquatic Biomes
Heterotrophs
38. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Temperate Deciduous Forest Plants
Intertidal Zone
Environmental Factors
Scavengers
39. Adaptations for maintaining their internal osmolarity and conserving water
Biome
Photic zone
Osmoregulation
Organism
40. 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
Herbivores
Photic zone
Thundra Animals
Desert Biome
41. Free-living organisms that feed on other living organisms
Coimax Vegetatioin
Predators
Biotic Environment
Competition Same Niche 2
42. 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
Rootlike holdfasts
Food Web
Autotrophs
Pyramid of Mass
43. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Taiga Animals
Symbionts
Material Cycles
Biotic Community
44. Polar bears - musk oxen - and arctic hens
Hydrosphere
Photic Zone
Thundra Animals
Food Web
45. 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
Ecosystem
Pyramid of Numbers
Hypotonic
Environmental Factors
46. 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
Lithosphere
Temperate Coniferous Forest Biome
Temperate Coniferous Plants
Nitrogen
47. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Ecological Succession
Coimax Vegetatioin
Food Web
Organism
48. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Aquatic Biomes
Grassland Biome
Intertidal Zone Population
Photic Zone
49. 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
Tundra Biome
Carbon Cycle 2
Other Cycles
Scavengers
50. 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
Mutualims
Autotrophs
Intertidal Zone