Biology

Sylvia S. Mader, Michael Windelspecht

Chapter 28

Invertebrate Evolution - all with Video Answers

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Chapter Questions

Problem 1

Which of these is not a characteristic of animals?
a. heterotrophic
b. ingest their food
c. cells lack cell walls
d. have chlorophyll
e. multicellular

SS

Sydney Stephens

Numerade Educator

Problem 2

The phylogenetic tree of animals shows that
a. rotifers are closely related to flatworms.
b. both molluscs and annelids are protostomes.
c. some animals have radial symmetry.
d. sponges were the first to evolve from an ancestral protist.
e. All of these are correct

Grant Castaneda

Grant Castaneda

Numerade Educator

Problem 3

Which of these does not pertain to a protostome?
a. spiral cleavage
b. blastopore is associated with the anus
c. coelom, splitting of mesoderm
d. annelids, arthropods, and molluscs
e. mouth is associated with first opening

Shazia Naz

Numerade Educator

Problem 4

Which features of a sponge are mismatched?
a. buds—asexual reproduction
b. collar cells—flagellated
c. osculum—upper opening
d. spicules—sexual reproduction
e. spongin—support

Grant Castaneda

Grant Castaneda

Numerade Educator

Problem 5

Comb jellies are most closely related to
a. cnidarians.
b. sponges.
c. flatworms.
d. roundworms.
e. rotifers.

Prashant Bana

Numerade Educator

Problem 6

Which of these pairs is mismatched?
a. sponges—spicules
b. cnidarians—nematocysts
c. cnidarians—polyp and medusa
d. hydra—nerve net
e. comb jellies—proglottids

Grant Castaneda

Grant Castaneda

Numerade Educator

Problem 7

Flukes and tapeworms
a. show cephalization.
b. have well-developed reproductive systems.
c. have well-developed nervous systems.
d. are free-living.
e. are generally microscopic.

RP

Roz Powers

Numerade Educator

Problem 8

Which of these best shows that snails are not closely related to crayfish?
a. Snails are terrestrial, and crayfish are aquatic.
b. Snails have a broad foot, and crayfish have jointed appendages.
c. Snails are hermaphroditic, and crayfish have separate sexes.
d. Snails are insects, but crayfish are fishes.
e. Snails are bivalves, and crayfish are chelicerates.

Grant Castaneda

Grant Castaneda

Numerade Educator

Problem 9

Segmentation in the earthworm is not exemplified by
a. body rings.
b. coelom divided by septae.
c. setae on most segments.
d. nephridia interior in most segments.
e. tympanum exterior to segments.

Alexander Cheng

Alexander Cheng

Numerade Educator

Problem 10

Roundworms lack which feature?
a. periodically shed their cuticle
b. pseudocoelom
c. segmentation
d. some are parasitic
e. All of these are correct.

Grant Castaneda

Grant Castaneda

Numerade Educator

Problem 11

Label this diagram.

Jessica Ballard

Jessica Ballard

Numerade Educator

Problem 12

Which characteristic(s) account(s) for the success of arthropods?
a. jointed exoskeleton
b. well-developed nervous system
c. segmentation
d. respiration adapted to environment
e. All of these are correct.

Grant Castaneda

Grant Castaneda

Numerade Educator

Problem 13

The two phyla in the Deuterostomia are
a. Arthropoda and Nematoda.
b. Brachiopoda and Platyhelminthes.
c. Cestoda and Rotifera.
d. Cnidaria and Ctenophora.
e. Echinodermata and Chordata.

Shazia Naz

Numerade Educator

Problem 14

Which is not a characteristic feature of sea stars?
a. coelom
b. eyespot
c. skin gills
d. trachea
e. tube feet

Grant Castaneda

Grant Castaneda

Numerade Educator

Problem 15

The water vascular system of sea stars functions in
a. circulation of gasses and nutrients.
b. digestion.
c. locomotion.
d. reproduction.
e. Both a and c are correct.

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