test 1 Flashcards
Which phylum has a body plan characterized by a highly branched, saclike gut, and a thin, flat body with all cells fairly close to the gut (acoelomate)?
a. Platyhelminthes
b. Nematoda
c. Echinodermata
d. Cnidaria
Platyhelminthes
Platyhelminths:
a. are acoelomate.
b. are coelomate.
c. are placomate.
d. are pseudocoelomate.
Acoelomate
The first known animal is considered to be a
a. Porifera.
b. Nematoda.
c. Platyhelminthes.
d. Placozoan
porifera
Which of the following is NOT a characteristic of the Cnidaria?
a. pharynx
b. mesoglea
c. nematocysts
d. polyp form
pharynx
The terms “acoelomate,” “pseudocoelomate,” and “coelomate” refer to
a. levels of cephalization.
b. the origin of the blastopore.
c. the body cavity of animals.
d. cleavage patterns of animals.
the body cavity of animals
Which of the following is an INCORRECT statement about the Cnidaria digestive system.
a. Digestive enzymes are secreted to break-down food.
b. It is complete, possessing a mouth and an anus.
c. The digestive tissue is the gastrodermis.
d. None of the above are incorrect statements about the Cnidaria digestive system.
It is complete, possessing a mouth and an anus.
Which of the following phyla is characterized by radially symmetrical members?
a. Arthropoda
b. Mollusca
c. Cnidaria
d. Platyhelminthes
Cnidaria
Periodic molting of the insect exoskeleton is necessary because
a. an insect must consume large amounts of food to support the growth of the exoskeleton.
b. the growth of the exoskeleton is not sufficient to accommodate the body growing inside it.
c. it prevents an insect from moving rapidly.
d. it attracts predators.
the growth of the exoskeleton is not sufficient to accommodate the body growing inside it.
Evidence for the evolutionary link between choanoflagellate protists colonies and animals is most clearly seen in
a. Echinodermata.
b. Cnidaria.
c. Mammalia.
d. Porifera.
porifera
An organism that possesses a scolex and proglottids is found in the class
a. Turbellaria.
b. Cestoda.
c. Platyhelminthes.
d. Trematoda.
cestoda
Which of the following groups does NOT have tissues?
a. Echinodermata
b. Cnidaria
c. Nematoda
d. Porifera
porifera
Pseudocoelomates have a body cavity that is not completely lined with ____________. These animals include ____________.
a. ectoderm; Porifera
b. membranes; Platyhelminthes
c. ectoderm; Cnidaria
d. membranes; Nematoda
membranes; Nematoda
Exoskeletons are most characteristic of which of the following?
a. Echinodermata
b. Mollusca
c. Arthropoda
d. Chordata
Arthropoda
The type of symmetry exhibited by the Cnidaria is known as _______ symmetry.
a. radial
b. asymmetrical
c. spherical
d. bilateral
radial
Which statement most accurately describes the colonial flagellate hypothesis?
a. Animals are descended from an ancestor that resembles a spherical colony of flagellated cells.
b. Both animals and fungi are descended from an ancestor that resembles a spherical colony of flagellated cells.
c. All animals are descended from an ancestor that resembles a single celled organism that was a flagellated cell.
d. None of these describe the colonial flagellate hypothesis.
Animals are descended from an ancestor that resembles a spherical colony of flagellated cells
Annelidia:
a. surround their body with a mantle.
b. have a segmented body
c. move with a muscular foot.
d. have a visceral mass.
have a segmented body
A mantle is found only among the
a. Echinodermata.
b. Mollusca.
c. Arthropoda.
d. Annelidia.
mollusca
The gelatinous matrix in the body of the Porifera is called
a. mesoderm.
b. mesoglea.
c. mesowhat.
d. mesochyme.
mesochyme
The individual, repeating units of a Cestoda are called
a. nematocysts.
b. proglottids.
c. oral suckers.
d. scolexs.
proglottids
The segments of a Cestoda that contain female and male sex organs are called
a. sporocysts.
b. scolexes.
c. proglottids.
d. cercariae.
proglottids
The major Arthropoda body parts are
a. head, thorax, and abdomen.
b. head, carapace, and abdomen.
c. cephalothorax, midsection, and abdomen.
d. head, prothorax, and metathorax.
head, thorax, and abdomen.
Porifera are
a. filter feeders.
b. scavengers.
c. predators.
d. herbivores.
filter feeders
The trend toward cephalization is first seen in the:
a. Porifera.
b. Cnidaria.
c. Platyhelminthes.
d. Nematoda.
Platyhelminthes
Molting in Arthropoda involves primarily a change in
a. eating habits.
b. sensory structures.
c. sex.
d. body size.
body size
Major trends in the evolution of animals include
a. variation in coelomic (body) cavities.
b. the development of segments.
c. the development of different types of symmetry.
d. All the above.
All the above
The ancestor of the animal clade was probably a(n)
a. triploblastic acoelomate with spiral cleavage.
b. ctenophore.
c. ciliated protist.
d. colonial flagellated protist.
colonial flagellated protist
Which of the following phyla exhibit an unlined body cavity (pseudocoelom)?
a. Cnidaria
b. Platyhelminthes
c. Porifera.
d. Nematoda.
Nematoda
Because all animals must take in nutrients from their environment and digest their food internally, the term applied to the nutritional mode of animals is
a. phagocytic.
b. photoautotrophic.
c. heterotrophic.
d. photoheterotrophic.
heterotrophic
A digestive tract is said to be complete if it AT LEAST
a. possesses specialized regions for different digestive tasks.
b. produces acids and contains enzymes.
c. is a one-way tube with a mouth and an anus.
d. is surrounded by muscle.
is a one-way tube with a mouth and an anus.
Which of the following is NOT a characteristic of all animals?
a. Animals are multicellular eukaryotes.
b. Animals produce gametes by meiosis.
c. Animals digest their food internally.
d. All the above are characteristics of animals.
All the above are characteristics of animals.
Which animal belongs in the Crustacea?
a. mite
b. spider
c. tick
d. shrimp
shrimp
Cephalization is most commonly associated with
a. sessile animals.
b. pentaradial symmetry.
c. bilateral symmetry
d. radial symmetry.
bilateral symmetry
Which of the following is NOT a characteristic of the Mollusca?
a. head and foot
b. carapace
c. mantle
d. gills
carapace
All animals are
a. multicellular, autotrophic, and haploid
b. multicellular, heterotrophic, and haploid.
c. multicellular, heterotrophic, and diploid.
d. multicellular, autotrophic, and diploid.
multicellular, heterotrophic, and diploid.
Which of the following is NOT a characteristic of Arthropoda?
a. open circulatory system
b. segmentation
c. jointed appendages
d. setae
setae
Porifera differ from other animals in that they
a. are heterotrophic..
b. None of the options.
c. do not form true organs.
d. are sessile.
do not form true organs
