BIOLOGY 102 23/24 EXAM QUESTIONS
AND ANSWERS. VERIFIED 2025/2026.
The cast majority of animals are - ANS invertebrates
looking back through time, one can see that all organisms are related. at branch points in the
animal family tree one can see where mutations give rise to - ANS changes in body plan,
biochemistry and behavior
the injectable pain-killing drug called ziconodide is an improvement over morphine-type drugs
because - ANS it is not addictive
the most successful of the invertebrate groups with respect to the numbers of species is -
ANS anthropoda
which of the following charcteristics is NOT true of most animal groups - ANS haploid
major trends in the evolution of animals include - ANS all of these
an animal with bilateral symmetry - ANS has left and right sides and usually displays
cephalilzation
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,most animals show _____ symmetry - ANS bilateral
which structure insulates various internal organs from the stresses of body-wall movement and
bathes them in a liquid through which nutrients and waste products can diffuse? - ANS a
coelom
all animals are - ANS multicellular and heterotrophic, and lack cell walls/diploid
a digestive tract is said to be complete if it at least - ANS is a one-way tube with a mouth and
an anus
which of the following statements most accurately describes the deuterostomes - ANS the
mouth develops from the second embryonic opening, and the first opening becomes the anus
an acoelomate animal has - ANS no coelom
the protist that is most closely related to animals is the - ANS choanflagellate
trichoplax is a - ANS placozoan
a major explosion of animal diversity in which all major marine lineages were formed took place
in the - ANS cambrian
which of the following processes are thought to have contributed to adaptive radiation of
animals during the cambrian period - ANS the first predators arose, the supercontinents were
breaking up and oxygen levels were rising in the atmosphere
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, sponges are - ANS filter feeders
unlike most other animals, sponges lack - ANS a digestive track, a symmetrical body plan, and
tissues
collar cells of sponges are much like the protists called - ANS choanocytes
feeding in sponges is dependent on - ANS collar cells, pores, and water flow
which of the following groups does NOT have tissues - ANS sponges
gemmules - ANS are reproductive agents
a typical sponge is ____ because it produces ____ - ANS a hermaphrodite; both egg and
sperm cells
nematocysts are - ANS defensive cells
"nerve net" describes the nervous system of - ANS cnidarians
the bulk of jellyfish consists of - ANS mesoglea
which of the following groups is characterized by radially symmetrical members -
ANS cnidaria
which is a stage in the life cycle of Obelia, a cnidarian - ANS all of these
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
AND ANSWERS. VERIFIED 2025/2026.
The cast majority of animals are - ANS invertebrates
looking back through time, one can see that all organisms are related. at branch points in the
animal family tree one can see where mutations give rise to - ANS changes in body plan,
biochemistry and behavior
the injectable pain-killing drug called ziconodide is an improvement over morphine-type drugs
because - ANS it is not addictive
the most successful of the invertebrate groups with respect to the numbers of species is -
ANS anthropoda
which of the following charcteristics is NOT true of most animal groups - ANS haploid
major trends in the evolution of animals include - ANS all of these
an animal with bilateral symmetry - ANS has left and right sides and usually displays
cephalilzation
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,most animals show _____ symmetry - ANS bilateral
which structure insulates various internal organs from the stresses of body-wall movement and
bathes them in a liquid through which nutrients and waste products can diffuse? - ANS a
coelom
all animals are - ANS multicellular and heterotrophic, and lack cell walls/diploid
a digestive tract is said to be complete if it at least - ANS is a one-way tube with a mouth and
an anus
which of the following statements most accurately describes the deuterostomes - ANS the
mouth develops from the second embryonic opening, and the first opening becomes the anus
an acoelomate animal has - ANS no coelom
the protist that is most closely related to animals is the - ANS choanflagellate
trichoplax is a - ANS placozoan
a major explosion of animal diversity in which all major marine lineages were formed took place
in the - ANS cambrian
which of the following processes are thought to have contributed to adaptive radiation of
animals during the cambrian period - ANS the first predators arose, the supercontinents were
breaking up and oxygen levels were rising in the atmosphere
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, sponges are - ANS filter feeders
unlike most other animals, sponges lack - ANS a digestive track, a symmetrical body plan, and
tissues
collar cells of sponges are much like the protists called - ANS choanocytes
feeding in sponges is dependent on - ANS collar cells, pores, and water flow
which of the following groups does NOT have tissues - ANS sponges
gemmules - ANS are reproductive agents
a typical sponge is ____ because it produces ____ - ANS a hermaphrodite; both egg and
sperm cells
nematocysts are - ANS defensive cells
"nerve net" describes the nervous system of - ANS cnidarians
the bulk of jellyfish consists of - ANS mesoglea
which of the following groups is characterized by radially symmetrical members -
ANS cnidaria
which is a stage in the life cycle of Obelia, a cnidarian - ANS all of these
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
