Exam (elaborations)
Oceanography Final Exam Questions EENS2230 Dr. Agnew Tulane University (1).
Oceanography Final Exam Questions EENS2230 Dr. Agnew Tulane University (1).
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At least 97% of all species of animals are invertebrates. - ✅✅-true✅✅
Most sponges are carnivores that suck prey in through specialized pores. -
-false
✅✅
Feeding currents in sponges are produced by flagellated cells called choanocytes. -
-true
✅✅
Food is trapped in most sponges by mineralized structures called spicules. -
-false
Support material in sponges is always made of calcium carbonate. - ✅✅-false
✅✅
Cnidarians capture prey mainly by entangling and wrapping them with their
tentacles. - -false
✅✅
Radial symmetry, such as seen in Cnidaria, occurs when similar parts of a body are
arranged and repeated around a central axis. - -true
✅✅
Mature marine hydrozoan Cnidaria are mainly colonies of polyps that produce
medusae - -true
✅✅
The Portugese man-of-war is a type of scyphozoan cnidarian with a gas float. -
-true
✅✅
Scyphozoan cnidarians may be found in a polyp form, but the medusa stage
generally dominates. - -true
Corals and gorgonians are types of anthozoan cnidarians. - ✅✅-true
✅✅
Ctenophores (comb jellies) are similar to scyphozoan cnidarians in that they have
tentacles with nematocysts. - -true
✅✅
In bilaterally symmetric animals, the term "bilateral" indicates that there are two ways
of cutting the body to get two identical halves. - -false
Platyhelminths have a centralized brain, while cnidarians do not. - ✅✅-true
✅✅
Most molluscs have a radula, a ribbon-like structure that carries rows of small teeth. -
-true
All molluscs have an external shell made of calcium carbonate. - ✅✅-false
, ✅✅
Some gastropods use their radulas to scrape algae from rocks, and some are
carnivores that may use the radula to rasp a hole in a prey's shell. - -true
Brachiopods or lamp shells are a type of mollusc with a two-part shell. - ✅✅-false
✅✅
Most bivalves use their radular teeth like a filter to trap small particles in the water. -
-false
✅✅
Cephalopods use a structure called a funnel to squirt out water from their mantle
cavities in order to create a kind of jet propulsion. - -true
Squids and cuttlefish have internal shells. - ✅✅-true
✅✅
Most chitons (Polyplacophora) use their radulas to scrape algae off shoreline rocks. -
-true
✅✅
Molluscs and annelids produce similar planktonic larvae called trochophores. -
-true
✅✅
Cephalopods are considered to have the most complex brain outside of the
vertebrates, capable of advanced learning. - -true
✅✅
Arthropods must discard (molt) their chitinous exoskeletons in order to grow. -
-true
Some amphipods can jump. - ✅✅-true
✅✅
Copepod crustaceans typically use their antennae to swim in the plankton. -
-true
Barnacles use their antennae to filter particles out of the water. - ✅✅-false
✅✅
Decapods generally have 5 pairs of swimming legs on the cephalothorax. -
-false
✅✅
Hermit crabs have a long, soft abdomen, while true crabs have a small abdomen
tucked under the cephalothorax. - -true
✅✅
Most asteroidean echinoderms are carnivores, while most ophiuroideans eat
particulate matter and small organisms off the bottom. - -true
✅✅
Sea urchins (echinoidean Echinodermata) feed with an elaborate jaw and muscle
device called Aristotle's lantern. - -true
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