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BioSci > test 1 > Flashcards

test 1 Flashcards

1
Q

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

A

Platyhelminthes

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2
Q

Platyhelminths:
a. are acoelomate.
b. are coelomate.
c. are placomate.
d. are pseudocoelomate.

A

Acoelomate

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3
Q

The first known animal is considered to be a
a. Porifera.
b. Nematoda.
c. Platyhelminthes.
d. Placozoan

A

porifera

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4
Q

Which of the following is NOT a characteristic of the Cnidaria?
a. pharynx
b. mesoglea
c. nematocysts
d. polyp form

A

pharynx

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5
Q

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.

A

the body cavity of animals

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6
Q

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.

A

It is complete, possessing a mouth and an anus.

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7
Q

Which of the following phyla is characterized by radially symmetrical members?
a. Arthropoda
b. Mollusca
c. Cnidaria
d. Platyhelminthes

A

Cnidaria

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8
Q

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.

A

the growth of the exoskeleton is not sufficient to accommodate the body growing inside it.

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9
Q

Evidence for the evolutionary link between choanoflagellate protists colonies and animals is most clearly seen in
a. Echinodermata.
b. Cnidaria.
c. Mammalia.
d. Porifera.

A

porifera

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10
Q

An organism that possesses a scolex and proglottids is found in the class
a. Turbellaria.
b. Cestoda.
c. Platyhelminthes.
d. Trematoda.

A

cestoda

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11
Q

Which of the following groups does NOT have tissues?
a. Echinodermata
b. Cnidaria
c. Nematoda
d. Porifera

A

porifera

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12
Q

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

A

membranes; Nematoda

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13
Q

Exoskeletons are most characteristic of which of the following?
a. Echinodermata
b. Mollusca
c. Arthropoda
d. Chordata

A

Arthropoda

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14
Q

The type of symmetry exhibited by the Cnidaria is known as _______ symmetry.
a. radial
b. asymmetrical
c. spherical
d. bilateral

A

radial

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15
Q

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.

A

Animals are descended from an ancestor that resembles a spherical colony of flagellated cells

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16
Q

Annelidia:
a. surround their body with a mantle.
b. have a segmented body
c. move with a muscular foot.
d. have a visceral mass.

A

have a segmented body

17
Q

A mantle is found only among the
a. Echinodermata.
b. Mollusca.
c. Arthropoda.
d. Annelidia.

A

mollusca

18
Q

The gelatinous matrix in the body of the Porifera is called
a. mesoderm.
b. mesoglea.
c. mesowhat.
d. mesochyme.

A

mesochyme

19
Q
A
20
Q

The individual, repeating units of a Cestoda are called
a. nematocysts.
b. proglottids.
c. oral suckers.
d. scolexs.

A

proglottids

21
Q

The segments of a Cestoda that contain female and male sex organs are called
a. sporocysts.
b. scolexes.
c. proglottids.
d. cercariae.

A

proglottids

22
Q

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.

A

head, thorax, and abdomen.

23
Q

Porifera are
a. filter feeders.
b. scavengers.
c. predators.
d. herbivores.

A

filter feeders

24
Q

The trend toward cephalization is first seen in the:
a. Porifera.
b. Cnidaria.
c. Platyhelminthes.
d. Nematoda.

A

Platyhelminthes

25
Q

Molting in Arthropoda involves primarily a change in
a. eating habits.
b. sensory structures.
c. sex.
d. body size.

A

body size

26
Q

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.

A

All the above

27
Q

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.

A

colonial flagellated protist

28
Q

Which of the following phyla exhibit an unlined body cavity (pseudocoelom)?
a. Cnidaria
b. Platyhelminthes
c. Porifera.
d. Nematoda.

A

Nematoda

29
Q

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.

A

heterotrophic

30
Q

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.

A

is a one-way tube with a mouth and an anus.

31
Q

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.

A

All the above are characteristics of animals.

32
Q

Which animal belongs in the Crustacea?
a. mite
b. spider
c. tick
d. shrimp

A

shrimp

33
Q

Cephalization is most commonly associated with
a. sessile animals.
b. pentaradial symmetry.
c. bilateral symmetry
d. radial symmetry.

A

bilateral symmetry

34
Q

Which of the following is NOT a characteristic of the Mollusca?
a. head and foot
b. carapace
c. mantle
d. gills

A

carapace

35
Q

All animals are
a. multicellular, autotrophic, and haploid
b. multicellular, heterotrophic, and haploid.
c. multicellular, heterotrophic, and diploid.
d. multicellular, autotrophic, and diploid.

A

multicellular, heterotrophic, and diploid.

36
Q

Which of the following is NOT a characteristic of Arthropoda?
a. open circulatory system
b. segmentation
c. jointed appendages
d. setae

A

setae

37
Q

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.

A

do not form true organs

BioSci (30 decks)

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