Life: The Science of Biology

David E. Sadava, David M. Hilliss, H. Craig Heller,May Berenbaum

Chapter 32

Protostome Animals - all with Video Answers

Educators

Chapter Questions

Problem 1

Members of which groups have lophophores?
a. Phoronids, brachiopods, and nematodes
$b$. Phoronids, brachiopods, and bryozoans
$c .$ Brachiopods, bryozoans, and flatworms
d. Phoronids, rotifers, and bryozoans
$e .$ Rotifers, bryozoans, and brachiopods

Heather Thornton

Heather Thornton

Numerade Educator

Problem 2

Which of the following is not part of the molluscan body plan?
a. Mantle
b. Foot
$c .$ Radula
$d .$ Visceral mass
$e .$ Jointed skeleton

Heather Thornton

Heather Thornton

Numerade Educator

Problem 3

Nautiluses control their buoyancy by
$a$. adjusting salt concentrations in their blood.
$b .$ forcibly expelling water from the mantle.
c. pumping water and gases in and out of internal chambers.
$d .$ using the complex sensory organs in their heads.
$e .$ swimming rapidly.

Heather Thornton

Heather Thornton

Numerade Educator

Problem 4

The outer covering of ecdysozoans
$a$. is always hard and rigid.
$b$. is always thin and flexible.
$c .$ is hard and rigid in larvae but thin in adults.
d. ranges from very thin to hard and rigid depending on the species.
e. grows throughout life to accommodate a growing body.

Emily Marty

Numerade Educator

Problem 5

Nematodes are abundant and diverse because
a. they are both parasitic and free-living and eat a wide variety of foods.
$b$. they are able to molt their exoskeleton.
$c .$ their thick cuticle enables them to move in complex ways.
$d$. their body cavity is a pseudocoelom.
$e .$ their segmented body enables them to live in many different places.

Heather Thornton

Heather Thornton

Numerade Educator

Problem 6

The arthropod exoskeleton is composed of a
$a .$ mixture of several kinds of polysaccharides.
$b$. mixture of several kinds of proteins.
$c .$ single complex polysaccharide called chitin.
$d .$ single complex protein called arthropodin.
$e .$ mixture of layers of proteins and a polysaccharide called chitin.

Morgan Thompson

Morgan Thompson

Numerade Educator

Problem 7

Which groups are arthropod relatives with unjointed legs?
$a .$ Trilobites and onychophorans
$b .$ Onychophorans and tardigrades
$c .$ Trilobites and tardigrades
$d .$ Onychophorans and chelicerates
e. Tardigrades and chelicerates

Emily Marty

Numerade Educator

Problem 8

The body plan of insects is composed of which of the three following regions?
a. Head, abdomen, and trachea
$b$. Head, abdomen, and cephalothorax
$c .$ Cephalothorax, abdomen, and trachea
d. Head, thorax, and abdomen
$e .$ Abdomen, trachea, and mantle

Heather Thornton

Heather Thornton

Numerade Educator

Problem 9

Insects whose hatchlings are sufficiently similar in form to adults to be recognizable are said to have
$a$. instars.
$b .$ neopterous development.
$c .$ accelerated development.
$d$. incomplete metamorphosis.
$e .$ complete metamorphosis.

Emily Marty

Numerade Educator

Problem 10

Factors that may have contributed to the remarkable evolutionary success of insects include
$a$. the lack of any other similar organisms in the terrestrial environments colonized by insects.
$b$. the ability to fly.
$c .$ complete metamorphosis.
d. a new mechanism for delivering oxygen to their internal tissues.
$e .$ all of the above

Emily Marty

Numerade Educator