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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. Animals that eat both plants and animals
Intertidal Zone
Freshwater Biomes
Omnivores
Competition Same Niche 2
2. 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
Symbionts
Niche
Taiga Plants
Intertidal Zone
3. The chief disruptive force
Competition
Sere
Nitrogen Cycle 4
Mutualims
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
Marine Biomes
Tropical Rain Forest Animals
Nitrogen Cycle 4
Food Chain
5. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness
Environmental Factors
Biosphere
Deep-sea Organisms
Osmoregulation
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
Aphotic Zone
Littoral Zone Populations
Grassland Biome
7. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels
Predator-Prey relationship
Primary Consumers
Environmental Factors
Biome
8. Consists of populations of different plants and animal species interacting with each other in a given environment
Aquatic Biomes
Competition Same Niche 3
Tropical Rain Forest Plants
Communities
9. Food chain is not a simple linear chain but an intricate web
Predators
Carbon Cycle 3
Tertiary Consumers
Food Web
10. Distinct community in a geographic region
Osmoregulation
Other Cycles
Biome
Freshwater Biomes
11. 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
Temperate Coniferous Forest Biome
Temperate Coniferous Plants
Nitrogen cycle 1
Commensalism
12. The orderly process by which one biotic community replaces or succeeds another until a climax community is established
Ecological Succession
Carbon Cycle 1
Environment
Hemeothermic (Warm Blooded)
13. The study of interactions between organisms and their environment
Marshes
Substratum-pH
Scavengers
Ecology
14. 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
Hypotonic
Ecology
Osmoregulation
Aquatic Biomes
15. The major component of the internal environment of all living things
Aphotic Zone animals
Nitrogen
Intertidal Zone Population
Physical Environment- Water
16. 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 Biome
Species
Taiga Animals
Material Cycles
17. Algae - sponges - clams - snails - sea urchins - starfish - and crabs
Intertidal Zone Population
Sere
Thundra Animals
Intraspecific Interactions
18. Two fates await the ammonia (NH3). some are nitrified or dentrified
Taiga Biome
Nitrogen Cycle 5
Successive Communities
Substratum-Humus
19. Used to include only the population and not their physical environment
Intertidal Zone Population
Biotic Community
Autotrophs
Food Pyramids
20. Links between oceans and land
Poikilothermic (Cold Blooded)
Marshes
Population
Temperate Deciduous Forest Animals
21. Conserve water actively
Desert Plants
Primary Consumers
Saprophytes
Carbon Cycle 2
22. Animals that consume only plants or plant foods
Ecological Succession
Desert Plants
Herbivores
Deep-sea Organisms
23. 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
Tropical Rain Forest Animals
Hemeothermic (Warm Blooded)
Nekton
Rootlike holdfasts
24. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Epiphytes
Climate and weather
Saprophytes
Tropical Rain Forest Biome
25. When a parasite benefits at the expense of the host
Population
Intraspecific Interactions
Grassland Animals
Parasitism
26. Encompasses all that is external to the organism and is necessary for its existence
Mutualims
Sere
Environment
Competition Same Niche 3
27. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion
Marshes
Hemeothermic (Warm Blooded)
Desert Plants
Producers
28. 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
Scavengers
Pyramid of Numbers
Climate and weather
29. Free-living organisms that feed on other living organisms
Dominant Species
Competition Same Niche 2
Hydrosphere
Predators
30. 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
Symbionts
Competition Same Niche 3
Competition Same Niche 2
Photic Zone animals
31. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Desert animals
Ecosystem
Predator-Prey relationship
Carbon Cycle 2
32. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Tropical Rain Forest Plants
Environmental Factors
Producers
Benthos
33. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months
Other Cycles
Biome
Temperate Deciduous Forest Plants
Pioneer Organism
34. Rhododendrons and pines are more suited for growth in acid oil
Parasitism
Benthos
Photic zone
Substratum-pH
35. 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
Substratum (soil/rock)
Climax Community
Symbionts
Saprophytes
36. Region typical of the open seas and can be divided into photic and aphotic zones
Nekton
Nitrogen
Pelagic Zone
Competition Same Niche 3
37. Region exposed to low tides that undergoes variations in temperature and periods of dryness
Aquatic Biomes
Intertidal Zone
Competition Same Niche 2
Nitrogen
38. 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
Successive Communities
Species
Material Cycles
Tundra Biome
39. Determines the nature of plant and animal life in the soil
Benthos
Decomposer
Substratum (soil/rock)
Second Law of Thermodynamics
40. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Competition Same Niche 2
Pioneer Organism
Biosphere
Physical Environment- Water
41. Animals that consume primary consumers (carnivores)
Intertidal Zone
Secondary Consumers
Climate and weather
Environmental Factors
42. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die
Intertidal Zone
Nitrogen Cycle 3
Nitrogen Cycle 4
Pyramid of Numbers
43. 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
Nitrogen Cycle 4
Nekton
Desert Biome
Predators
44. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Intertidal Zone Population
Substratum-texture
Pyramid of Numbers
Desert animals
45. Composed of populations that are able to exist under the new conditions
Sere
Nitrogen cycle 1
Successive Communities
Photic zone
46. Crawling and sessile organsms
Saprophytes
Benthos
Omnivores
Organism
47. 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
Pelagic Zone
Environmental Factors
Substratum-Humus
Intraspecific Interactions
48. 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
Environmental Factors
Food Pyramids
Ecological Succession
Obligatory
49. Only animal life and other heterotrophic life exists
Aphotic Zone
Pelagic Zone
Sere
Environment
50. Adaptations for maintaining their internal osmolarity and conserving water
Desert animals
Osmoregulation
Competition Same Niche 3
Tropical Rain Forest Plants