Biology 1402 Test 3 Held
1 (UPDATED:Biology 1402 Test 3 Held: 2026 - 2027 VERIFIED STUDY GUIDE). !!!!!!!!!!!!!!
Study online at https://quizlet.com/_f86v7q
1. Larva An early stage in the life cycle of an organism that will
undergo complete metamorphosis.
2. Metamorphosis A marked change in form, character, or function; a trans-
formation
3. Invertebrate An animal without a backbone
4. Vertebrate An animal with a backbone
5. Bilateral symme- Body plan in which only a single, imaginary line can divide
try the body into two equal halves.
6. Coelom Body cavity
7. Cephalization concentration of sense organs and nerve cells at the front
of an animal's body
Get a head
8. Radial symmetry Symmetry about a central axis.
9. pseudocoelom body cavity between the endoderm and mesoderm tis-
sues that is partially lined with mesoderm tissue
10. segmentation subdivide main axis of body into stripes, Body is made up
of a series of fused rings; external and internal structures
are repeated segment by segment
11. 2-ended gastro-intestinal tract= mouth-anus
12. sac-like gut only one opening for both waste and food
13. Porifera (pores)* Ex: Sponges
sessile (stationary) filter feeders, supportive extracellular
matrix, sac-like gut, vase shaped
incurrent pores(water exits via mouth), Choanocytes( cil-
iated cells = human lungs),
amoebocytes (crawling cells=macrophages)
14.
2026/04/06 4/6/2026, 6:29:41 PM 4/6/2026, 6:29:38 PM
, Biology 1402 Test 3 Held
2 (UPDATED:Biology 1402 Test 3 Held: 2026 - 2027 VERIFIED STUDY GUIDE). !!!!!!!!!!!!!!
Study online at https://quizlet.com/_f86v7q
Cnidaria (nee- Ex: Jellyfish, hydras, corals, sea anemones
dle)* shaped like vases (polyps) or umbrellas(medusa)
Nerves= loose network
Bizarre= Regenerate lost parts
Mythology= hydra & medusa
15. Platyhelminthes Ex: flatworms, tapeworms
(flat worms)* Head: "brain" senses for light, chemicals, pressure
GPP/Evol: constraint: small
Bizarre= mouth=navel
16. Nematodes* Roundworms
Pseudocoelom, no muscle around gut
trichinosis
17. Molluscs* Snails, Octopuses, Clams
bilateral symmetry, open circulatory system
bizarre= eyes on tentacles
GPP/evol. Convergence (discovery of lens)
18. Annelids (tiny earthworms, leeches
rings)* segments, gut specializations, 2-ended gut, closed circu-
latory system
GPP/Evol.= Opportunites, not just constraints
Hermpahrodites
19. Arthropods Insects, spiders, crab, lobsters, centipedes
(jointed foot)* Crustaceans and insects, largest group of animals on
earth.
exoskeleton, specialized segments: appendages, acute
senses
Metamorphosis: larva, pupil, adult
20. Echinoderms sea stars, sea urchins
(spiny skin)* Bilaterally symmetric, endoskeleton,
*tube feet
21. Choanocyte Collar cells that line the body cavity and have flagella that
circulate water in sponges
2026/04/06 4/6/2026, 6:29:41 PM 4/6/2026, 6:29:38 PM
1 (UPDATED:Biology 1402 Test 3 Held: 2026 - 2027 VERIFIED STUDY GUIDE). !!!!!!!!!!!!!!
Study online at https://quizlet.com/_f86v7q
1. Larva An early stage in the life cycle of an organism that will
undergo complete metamorphosis.
2. Metamorphosis A marked change in form, character, or function; a trans-
formation
3. Invertebrate An animal without a backbone
4. Vertebrate An animal with a backbone
5. Bilateral symme- Body plan in which only a single, imaginary line can divide
try the body into two equal halves.
6. Coelom Body cavity
7. Cephalization concentration of sense organs and nerve cells at the front
of an animal's body
Get a head
8. Radial symmetry Symmetry about a central axis.
9. pseudocoelom body cavity between the endoderm and mesoderm tis-
sues that is partially lined with mesoderm tissue
10. segmentation subdivide main axis of body into stripes, Body is made up
of a series of fused rings; external and internal structures
are repeated segment by segment
11. 2-ended gastro-intestinal tract= mouth-anus
12. sac-like gut only one opening for both waste and food
13. Porifera (pores)* Ex: Sponges
sessile (stationary) filter feeders, supportive extracellular
matrix, sac-like gut, vase shaped
incurrent pores(water exits via mouth), Choanocytes( cil-
iated cells = human lungs),
amoebocytes (crawling cells=macrophages)
14.
2026/04/06 4/6/2026, 6:29:41 PM 4/6/2026, 6:29:38 PM
, Biology 1402 Test 3 Held
2 (UPDATED:Biology 1402 Test 3 Held: 2026 - 2027 VERIFIED STUDY GUIDE). !!!!!!!!!!!!!!
Study online at https://quizlet.com/_f86v7q
Cnidaria (nee- Ex: Jellyfish, hydras, corals, sea anemones
dle)* shaped like vases (polyps) or umbrellas(medusa)
Nerves= loose network
Bizarre= Regenerate lost parts
Mythology= hydra & medusa
15. Platyhelminthes Ex: flatworms, tapeworms
(flat worms)* Head: "brain" senses for light, chemicals, pressure
GPP/Evol: constraint: small
Bizarre= mouth=navel
16. Nematodes* Roundworms
Pseudocoelom, no muscle around gut
trichinosis
17. Molluscs* Snails, Octopuses, Clams
bilateral symmetry, open circulatory system
bizarre= eyes on tentacles
GPP/evol. Convergence (discovery of lens)
18. Annelids (tiny earthworms, leeches
rings)* segments, gut specializations, 2-ended gut, closed circu-
latory system
GPP/Evol.= Opportunites, not just constraints
Hermpahrodites
19. Arthropods Insects, spiders, crab, lobsters, centipedes
(jointed foot)* Crustaceans and insects, largest group of animals on
earth.
exoskeleton, specialized segments: appendages, acute
senses
Metamorphosis: larva, pupil, adult
20. Echinoderms sea stars, sea urchins
(spiny skin)* Bilaterally symmetric, endoskeleton,
*tube feet
21. Choanocyte Collar cells that line the body cavity and have flagella that
circulate water in sponges
2026/04/06 4/6/2026, 6:29:41 PM 4/6/2026, 6:29:38 PM
