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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. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds
Taiga Animals
Saprophytes
Coimax Vegetatioin
Abiotic (Physical) Environment
2. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere
Epiphytes
Nitrogen cycle 1
Substratum-Minerals
Biosphere
3. Forest floors contain moss and lichens
Taiga Plants
Freshwater Biomes
Commensalism
Food Web
4. Integrated system of species that are dependent upon one another for survival
Community
Nitrogen Cycle 2
Tropical Rain Forest Biome
Intertidal Zone
5. Algae - crabs - crustacea - and many different species of fish
Climate and weather
Nitrogen Cycle 5
Littoral Zone Populations
Symbionts
6. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores
Littoral Zone
Intraspecific Interactions
Biome
Biotic Environment
7. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids
Community
Producers
Aphotic Zone
Osmoregulation
8. The study of interactions between organisms and their environment
Desert animals
Tertiary Consumers
Ecology
Substratum-Minerals
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
Temperate Coniferous Forest Biome
Biotic Environment
Tertiary Consumers
Saprophytes
10. 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
Taiga Biome
Successive Communities
Tropical Rain Forest Biome
Pyramid of Energy
11. 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
Commensalism
Osmoregulation
Physical Environment-Sunlight
Niche
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
Climate and weather
Thundra Animals
Omnivores
Temperate Coniferous Forest Biome
13. 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
Grassland Biome
Environmental Factors
Conditions for stability in an Ecosystem
Competition Same Niche 2
14. Region typical of the open seas and can be divided into photic and aphotic zones
Food Pyramids
Pelagic Zone
Tertiary Consumers
Intraspecific Interactions
15. One species may be competitively superior to the other and drive the second to extinction
Competition Same Niche
Population
Coimax Vegetatioin
Photic zone
16. Regiong beneatht he photic zone that receives no light
Aphotic Zone
Photic Zone
Tropical Rain Forest Animals
Ecological Succession
17. 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
Freshwater Biomes
Hypotonic
Photic zone
Population
18. Links between oceans and land
Tropical Rain Forest Plants
Hydrosphere
Commensalism
Marshes
19. Nekton and benthos - scavengers - and predators (fiercely competitive)
Predator-Prey relationship
Marine Biomes
Aphotic Zone animals
Temperate Deciduous Forest Animals
20. Animals that consume green plants (herbivores)
Littoral Zone
Primary Consumers
Rootlike holdfasts
Sere
21. 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
Pelagic Zone
Desert animals
Food Pyramids
Grassland Animals
22. 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
Symbionts
Carbon Cycle 2
Omnivores
Environmental Factors
23. Developed long legs and many are hoofed
Commensalism
Community
Grassland Animals
Mutualims
24. Crawling and sessile organsms
Pyramid of Energy
Dominant Species
Benthos
Marine Biomes
25. 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
Nitrogen Cycle 4
Taiga Biome
Food Chain
Parasitism
26. 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
Desert Biome
Sere
Pyramid of Numbers
27. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment
Climax Community
Physical Environment- Water
Nitrogen Cycle 2
Substratum-Humus
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
Sere
Pyramid of Mass
Temperate Deciduous Forest Animals
Competition Same Niche 3
29. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins
Material Cycles
Competition Same Niche 3
Nitrogen Cycle 2
Grassland Animals
30. Includes the community and the environment and usually all five kingdoms
Aquatic Biomes
Climate and weather
Tropical Rain Forest Animals
Ecosystem
31. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles
Grassland Biome
Organism
Sere
Physical Environment-Temperature
32. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor
Epiphytes
Lithosphere
Photic Zone animals
Substratum-Humus
33. The vegetation that becomes dominant and stable after years of evolutiionary development
Dominant Species
Osmoregulation
Coimax Vegetatioin
Nitrogen Cycle 3
34. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms
Deep-sea Organisms
Material Cycles
Biome
Nature of Biomes
35. The ultimate source of energy for all organisms
Physical Environment-Sunlight
Saprophytes
Nature of Biomes
Substratum-pH
36. Consists of populations of different plants and animal species interacting with each other in a given environment
Communities
Obligatory
Dentrified
Tundra Biome
37. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place
Photic Zone
Intertidal Zone
Physical Environment-Temperature
Producers
38. Free-living organisms that feed on other living organisms
Predators
Aphotic Zone
Hydrosphere
Biotic Community
39. An essential component of amino acids and nucleic acids - which are the building blocks of all living things
Photic zone
Marshes
Nitrogen
Pyramid of Mass
40. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat
Substratum-pH
Biosphere
Tropical Rain Forest Plants
Marine Biomes
41. 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
Nitrified
Aphotic Zone
Littoral Zone Populations
Aquatic Biomes
42. 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
Other Cycles
Aphotic Zone
Pyramid of Mass
Carnivores
43. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants
Species
Secondary Consumers
Cohesive Force
Symbionts
44. Animals that feed on secondary consumer
Nitrified
Substratum-Humus
Pyramid of Numbers
Tertiary Consumers
45. When a parasite benefits at the expense of the host
Parasitism
Tertiary Consumers
Conditions for stability in an Ecosystem
Sere
46. Determines water holding capacity
Physical Environment- Water
Scavengers
Aphotic Zone animals
Substratum-texture
47. Composed of populations that are able to exist under the new conditions
Competition Same Niche
Successive Communities
Nitrified
Temperate Deciduous Forest Plants
48. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures
Grassland Biome
Nature of Biomes
Lithosphere
Desert animals
49. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down
Intertidal Zone
Pyramid of Numbers
Scavengers
Successive Communities
50. Rock and soil surface
Lithosphere
Dominant Species
Ecology
Aphotic Zone animals