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Diversity of Aquatic Organisms: Rotifers, Annelids, and Arthropods

Practice Quizzing



1

Asplanchna and Brachionus are most likely to be found in which habitat?
A)Aufwuchs
B)Benthic
C)Riparian
D)Pelagic (zooplankton)
E)Profundal
2

These rotifers and microcrustaceans live in gravel 3 m below the open water, inside a river's gravel bed.
A)Riparian
B)Lentic-Benthic
C)Hyporheic interstitial meiofauna
D)Pelagic (zooplankton)
E)Profundal
3

These chironomid larvae live in mud at 30 m depth in Lake Mendota.
A)Aufwuchs
B)Riparian
C)Neuston
D)Pelagic (zooplankton)
E)Benthic
4

These Floscularia, and other sessile rotifers, glue themselves to substrates in shallow water.
A)Aufwuchs
B)Hyponeuston
C)Interstitial meiofauna
D)Pelagic (zooplankton)
E)Profundal
5

These microcrustaceans have an antennae approximately as long as their body and no carapace. Among the zooplankton, these animals are most specialized for rapid escape movements.
A)Rotifers
B)Branchiopods (such as Daphnia)
C)Calanoid copepod
D)Chironomid larvae
E)Annelid worms
6

These non-arthropods include herbivore and predator species such as Asplanchna.
A)Rotifers
B)Chaoborus larvae
C)Calanoid copepods
D)Cyclopoid copepods
E)Annelid worms
7

These segmented and elongated animals lacking legs in the adult form can be as large as several cm long.
A)Bdelloid rotifers
B)Branchiopods (such as Daphnia)
C)Chaoborus larvae
D)Chironomid larvae
E)Annelid worms
8

Among the zooplankton, these microcrustaceans are specialized to gather the most amount of food per unit time, and do best when food is abundant and non-toxic. They filter feed, catching algae using electrostatic filtration and large filter combs.
A)Rotifers
B)Branchiopods (such as Daphnia)
C)Calanoid copepods
D)Cyclopoid copepods
E)Harpacticoid copepods
9

These arthropods lack a carapace. Rudi Strickler says they "walk" through water.
A)Rotifers
B)Branchiopods (such as Daphnia)
C)Calanoid copepod
D)Cyclopoid copepod
E)Beetle larvae
10

Which statement is most true about cyclomorphosis?
A)Commonly seen in rotifers, branchiopods, copepods, and aquatic insects.
B)Found mainly in freshwater copepods (especially calanoids and cyclopoids).
C)Induced by a chemical signal in the water, and the chemical structure of the chemical signal is known precisely in most cases.
D)Typically induced in rotifers and water fleas by the "smell" of predators.
E)Solely an adaptation to reduce sinking rate.
11

Among the freshwater crustaceans, animals in which group have the most appendages attached to the thorax, and are most often eaten by humans?
A)Annelida
B)Branchiopoda
C)Copepoda
D)Insecta
E)Malacostraca
12

These organisms are flattened dorso-ventrally.
A)Amphipoda
B)Anomopoda
C)Decapoda
D)Isopoda
E)Mysidacea