QUESTION 5
Dinoflagellates are often regarded negatively because of fishkills associated with red tides, but they are beneficial to somemarine ecosystems because
red tides only kill undesirable fish
their shells form limestone deposits when they die
they form zooxanthelae that have a mutualistic relationship withcoral polyps
they make nutrients available o other planktonic species byconverting ammonia into nitrate
10 points
QUESTION 6
You are working on a team to characterize a local lake'splankton community. Using a compound microscope, you isolate onespecimen from a water sample. It is unicellular and has aspecialized feeding groove cut into the cell surface. To whatsupergroup does this organism belong?
Excavata
Alveolata
Amebozoa
Opisthokonta
10 points
QUESTION 7
The group of protists to which you are most closely relatedis
slime molds
excavata
choanoflagellates
amoebas
10 points
QUESTION 8
Why are photosynthetic marine algae often not green colored likephotosynthetic terrestrial plants?
they do not perform oxidative photosynthesis
the different colored pigments absort the different wavelengthsof light in the water
the algae are actually green when taken out of the water
the algae are parasitized by other protists that have differentpigments
QUESTION 5
Dinoflagellates are often regarded negatively because of fishkills associated with red tides, but they are beneficial to somemarine ecosystems because
red tides only kill undesirable fish | ||
their shells form limestone deposits when they die | ||
they form zooxanthelae that have a mutualistic relationship withcoral polyps | ||
they make nutrients available o other planktonic species byconverting ammonia into nitrate |
10 points
QUESTION 6
You are working on a team to characterize a local lake'splankton community. Using a compound microscope, you isolate onespecimen from a water sample. It is unicellular and has aspecialized feeding groove cut into the cell surface. To whatsupergroup does this organism belong?
Excavata | ||
Alveolata | ||
Amebozoa | ||
Opisthokonta |
10 points
QUESTION 7
The group of protists to which you are most closely relatedis
slime molds | ||
excavata | ||
choanoflagellates | ||
amoebas |
10 points
QUESTION 8
Why are photosynthetic marine algae often not green colored likephotosynthetic terrestrial plants?
they do not perform oxidative photosynthesis | ||
the different colored pigments absort the different wavelengthsof light in the water | ||
the algae are actually green when taken out of the water | ||
the algae are parasitized by other protists that have differentpigments |
