BIOL 1402: Exam 3 Lewis Held Exam
Questions & Answers (Grade A+)
larva -
correct answer ✅a free living sexually immature form in some
animal life cycles that may differ from the adult in morphology,
nutrition and habitat.
metamorphosis -
correct answer ✅The transformation of a larva into an adult. See
also complete metamorphosis; incomplete metamorphosis.
colonial aggregate -
correct answer ✅A group of species within a genus (not a
subgenus), or a group of subspecies within a species
Invertebrate -
correct answer ✅An animal without a backbone
Vertebrate -
correct answer ✅An animal with a backbone
bilateral symmetry -
correct answer ✅An arrangement of body parts such that an
organism can be divided equally by a single cut passing
,BIOL 1402: Exam 3 Lewis Held Exam
Questions & Answers (Grade A+)
longitudinally through it. A bilaterally symmetric organism has
mirror-image right and left sides.
radial symmetry -
correct answer ✅An arrangement of the body parts of an
organism like pieces of a pie around an imaginary central axis. Any
slice passing longitudinally through a radially symmetric organism's
central axis divides the organism into mirror-image halves.
coelom -
correct answer ✅A body cavity completely lined with mesoderm.
segmentation -
correct answer ✅Subdivision along the length of an animal body
into a series of repeated parts called segments; allows for greater
flexibility and mobility.
Cephalization -
correct answer ✅An evolutionary trend toward concentration of
the nervous system at the head end.
,BIOL 1402: Exam 3 Lewis Held Exam
Questions & Answers (Grade A+)
2-ended Gut Vs Sac Like gut -
correct answer ✅?
Porifera -
correct answer ✅Aquatic, no symmetry, filter feeders, sessile,
Example: sponges
Platyhelminthes -
correct answer ✅Flatworms that lack a coelom; many are
parasitic, all lack either a circulatory or respiratory system and do
not have a body cavity. Characteristics: flattened body, bilateral
symmetry, triploblastic with three germ layers
Mollusca -
correct answer ✅Gastropods(snails and slugs), bivalves(octopi and
squid)
All have muscular foot and mantle, which encloses the visceral
mass and may secrete a shell. Many feed with rasping radula
Arthropoda -
correct answer ✅Chelicerates (arachnids), myriapods(millipedes
, BIOL 1402: Exam 3 Lewis Held Exam
Questions & Answers (Grade A+)
and centipedes), and pan crustaceans (aquatic crustaceans and
terrestrial insects)
Segmented body, appendages on at least one segment, a nervous
system, a hard exoskeleton.
Cnidaria -
correct answer ✅Member of phylum Cnidaria; an animal
characterized by cnidocytes, radial symmetry, a gastrovascular
cavity, and a polyp and medusa body form. Cnidarians include the
hydras, jellies, sea anemones, corals, and related animals.
nematoda -
correct answer ✅Covered by a protective cuticle that is shed
periodically. Many nematodes (roundworms) are free-living
decomposers; others are plant or animal parasites.
annelida -
correct answer ✅Errantia (mostly mobile marine worms) and
sedentaria (less mobile worms, including earthworms, leeches and
many tube dwellers)
Bilaterally symmetrical, Body wall, coelom, nervous system, sense
organs, segmental organs, circulation and respiratory structures
Questions & Answers (Grade A+)
larva -
correct answer ✅a free living sexually immature form in some
animal life cycles that may differ from the adult in morphology,
nutrition and habitat.
metamorphosis -
correct answer ✅The transformation of a larva into an adult. See
also complete metamorphosis; incomplete metamorphosis.
colonial aggregate -
correct answer ✅A group of species within a genus (not a
subgenus), or a group of subspecies within a species
Invertebrate -
correct answer ✅An animal without a backbone
Vertebrate -
correct answer ✅An animal with a backbone
bilateral symmetry -
correct answer ✅An arrangement of body parts such that an
organism can be divided equally by a single cut passing
,BIOL 1402: Exam 3 Lewis Held Exam
Questions & Answers (Grade A+)
longitudinally through it. A bilaterally symmetric organism has
mirror-image right and left sides.
radial symmetry -
correct answer ✅An arrangement of the body parts of an
organism like pieces of a pie around an imaginary central axis. Any
slice passing longitudinally through a radially symmetric organism's
central axis divides the organism into mirror-image halves.
coelom -
correct answer ✅A body cavity completely lined with mesoderm.
segmentation -
correct answer ✅Subdivision along the length of an animal body
into a series of repeated parts called segments; allows for greater
flexibility and mobility.
Cephalization -
correct answer ✅An evolutionary trend toward concentration of
the nervous system at the head end.
,BIOL 1402: Exam 3 Lewis Held Exam
Questions & Answers (Grade A+)
2-ended Gut Vs Sac Like gut -
correct answer ✅?
Porifera -
correct answer ✅Aquatic, no symmetry, filter feeders, sessile,
Example: sponges
Platyhelminthes -
correct answer ✅Flatworms that lack a coelom; many are
parasitic, all lack either a circulatory or respiratory system and do
not have a body cavity. Characteristics: flattened body, bilateral
symmetry, triploblastic with three germ layers
Mollusca -
correct answer ✅Gastropods(snails and slugs), bivalves(octopi and
squid)
All have muscular foot and mantle, which encloses the visceral
mass and may secrete a shell. Many feed with rasping radula
Arthropoda -
correct answer ✅Chelicerates (arachnids), myriapods(millipedes
, BIOL 1402: Exam 3 Lewis Held Exam
Questions & Answers (Grade A+)
and centipedes), and pan crustaceans (aquatic crustaceans and
terrestrial insects)
Segmented body, appendages on at least one segment, a nervous
system, a hard exoskeleton.
Cnidaria -
correct answer ✅Member of phylum Cnidaria; an animal
characterized by cnidocytes, radial symmetry, a gastrovascular
cavity, and a polyp and medusa body form. Cnidarians include the
hydras, jellies, sea anemones, corals, and related animals.
nematoda -
correct answer ✅Covered by a protective cuticle that is shed
periodically. Many nematodes (roundworms) are free-living
decomposers; others are plant or animal parasites.
annelida -
correct answer ✅Errantia (mostly mobile marine worms) and
sedentaria (less mobile worms, including earthworms, leeches and
many tube dwellers)
Bilaterally symmetrical, Body wall, coelom, nervous system, sense
organs, segmental organs, circulation and respiratory structures
