ocean 100 sacramentogrilo final exam
UPDATED ACTUAL Exam Questions and
CORRECT Answers
biological productivity - CORRECT ANSWER - synthesis of organic materials from
inorganic substances by photosynthesis/chemosynthesis
what are the inputs & outputs of photosynthesis? - CORRECT ANSWER - inputs: water,
carbon dioxide, & sun energy
outputs: sugar & oxygen
(6H2O + 6CO2 + sunlight - > C6H12O6 + 6O2)
what are the different types of light penetration in the oceans? - CORRECT ANSWER - 1.
red/orange = turned into heat energy b/c they cannot reach all the way down
2. green/blue/purple = farthest reaching light
euphotic zone - CORRECT ANSWER - light zone; extends from the surface down to the
compensation depth for photosynthesis, which is approx. 200m (330ft) in the open ocean
what are the 3 broad groups of sea "plants"? - CORRECT ANSWER - 1. seed plants (true
plants)
2. protists
3. cyanobacteria
seed plants (true plants) - CORRECT ANSWER - 1. eukaryotic
2. occur exclusively in shallow coastal areas
3. typically found in high-energy environments (intertidal zones)
4. ex. grasses & mangroves
, protists - CORRECT ANSWER - 1. eukaryotic
2. ex. large algae (brown, green, & red), phytoplankton, diatoms, coccolithophores, &
dinoflagellates
cyanobacteria - CORRECT ANSWER - 1. prokaryotic
2. FIRST photosynthesizers (3.5bya)
3. ex. blue/green algae
why are seed "plants" (true plants) all autotrophs? - CORRECT ANSWER - they produce
their own food
what is taken from algae for our use? which kind? - CORRECT ANSWER - carrageenan,
which is used as a thickener & emulsifier, is derived from RED algae
what regions have high productivity? why? - CORRECT ANSWER - 1. polar regions b/c
there is NO thermocline (waters are constantly upwelling & downwelling b/c it is cold)
2. coastal regions b/c of upwelling due to ekman flow & nutrients from land
3. coral reefs
what regions have low productivity? why? - CORRECT ANSWER - subtropical regions
b/c there is a STABLE thermocline & far away from land (does not get nutrients)
what is the most abundant of all sea "plants"? - CORRECT ANSWER - phytoplankton
what are the trophic levels in order (top to bottom)? - CORRECT ANSWER - 1. top
predators
2. secondary consumers
3. primary consumers
4. primary producers
UPDATED ACTUAL Exam Questions and
CORRECT Answers
biological productivity - CORRECT ANSWER - synthesis of organic materials from
inorganic substances by photosynthesis/chemosynthesis
what are the inputs & outputs of photosynthesis? - CORRECT ANSWER - inputs: water,
carbon dioxide, & sun energy
outputs: sugar & oxygen
(6H2O + 6CO2 + sunlight - > C6H12O6 + 6O2)
what are the different types of light penetration in the oceans? - CORRECT ANSWER - 1.
red/orange = turned into heat energy b/c they cannot reach all the way down
2. green/blue/purple = farthest reaching light
euphotic zone - CORRECT ANSWER - light zone; extends from the surface down to the
compensation depth for photosynthesis, which is approx. 200m (330ft) in the open ocean
what are the 3 broad groups of sea "plants"? - CORRECT ANSWER - 1. seed plants (true
plants)
2. protists
3. cyanobacteria
seed plants (true plants) - CORRECT ANSWER - 1. eukaryotic
2. occur exclusively in shallow coastal areas
3. typically found in high-energy environments (intertidal zones)
4. ex. grasses & mangroves
, protists - CORRECT ANSWER - 1. eukaryotic
2. ex. large algae (brown, green, & red), phytoplankton, diatoms, coccolithophores, &
dinoflagellates
cyanobacteria - CORRECT ANSWER - 1. prokaryotic
2. FIRST photosynthesizers (3.5bya)
3. ex. blue/green algae
why are seed "plants" (true plants) all autotrophs? - CORRECT ANSWER - they produce
their own food
what is taken from algae for our use? which kind? - CORRECT ANSWER - carrageenan,
which is used as a thickener & emulsifier, is derived from RED algae
what regions have high productivity? why? - CORRECT ANSWER - 1. polar regions b/c
there is NO thermocline (waters are constantly upwelling & downwelling b/c it is cold)
2. coastal regions b/c of upwelling due to ekman flow & nutrients from land
3. coral reefs
what regions have low productivity? why? - CORRECT ANSWER - subtropical regions
b/c there is a STABLE thermocline & far away from land (does not get nutrients)
what is the most abundant of all sea "plants"? - CORRECT ANSWER - phytoplankton
what are the trophic levels in order (top to bottom)? - CORRECT ANSWER - 1. top
predators
2. secondary consumers
3. primary consumers
4. primary producers
