Intro to Marine Biology Exam 3 Study Guide Questions and Answers |Complete Solutions
Graded A+|100% Correct
Describe Temperature Most intertidal organism can tolerate a wide temperature range.
Move to moist hiding places to avoid drying out also avoid high temperatures. The light color of
some snail shells help reflect sunlight.
Describe salinity When it rains, intertidal organisms have to endure fresh water, which can
be fatal. Many keep freshwater out by clamming up. In tide pools, rain lowers the salinity and
evaporation on hot days increases salinity.
Describe Interruption of feeding - Little sediments in rocky intertidal so deposit feeders are
uncommon
-Most sessile animals are filter feeders (have to be immersed in order to feed; no feeding at low
tide
-Grazers
-Detritus
-Organisms higher in the intertidal may not be underwater long enough to get enough food
Describe wave action and tides -Wave shock
-Found in sheltered locations because wave action is too strong
Describe limited space - Unoccupied space is often in short supply
- Sessile organisms need a permanent place to attach
- Organisms often attach to each other instead of rocks
Which organisms are most likely to be found on the Rocky Shore? Algae, lichens, sponges,
sea anemones, marine worms, crustaceans, mollusks, echinoderms, and some fishes.
What are some ways that organisms cope with wave shock? Sessile organisms anchor
themselves firmly to rocks, seaweeds use holdfasts or encrust, barnacles have glue and mussels
Graded A+|100% Correct
Describe Temperature Most intertidal organism can tolerate a wide temperature range.
Move to moist hiding places to avoid drying out also avoid high temperatures. The light color of
some snail shells help reflect sunlight.
Describe salinity When it rains, intertidal organisms have to endure fresh water, which can
be fatal. Many keep freshwater out by clamming up. In tide pools, rain lowers the salinity and
evaporation on hot days increases salinity.
Describe Interruption of feeding - Little sediments in rocky intertidal so deposit feeders are
uncommon
-Most sessile animals are filter feeders (have to be immersed in order to feed; no feeding at low
tide
-Grazers
-Detritus
-Organisms higher in the intertidal may not be underwater long enough to get enough food
Describe wave action and tides -Wave shock
-Found in sheltered locations because wave action is too strong
Describe limited space - Unoccupied space is often in short supply
- Sessile organisms need a permanent place to attach
- Organisms often attach to each other instead of rocks
Which organisms are most likely to be found on the Rocky Shore? Algae, lichens, sponges,
sea anemones, marine worms, crustaceans, mollusks, echinoderms, and some fishes.
What are some ways that organisms cope with wave shock? Sessile organisms anchor
themselves firmly to rocks, seaweeds use holdfasts or encrust, barnacles have glue and mussels
