TAMU Biology 112 Exam Pack (2025/2026 Edition) —
Actual University Exam Questions & Verified Correct
Answers | Updated & Comprehensive Study Resource
Which of the following are NOT found in sponges?
a) Cnidocytes
b) Spicules
c) Amoebocytes
d) Spongocoela
e) Choanocytes - ----Answers ----- Cnidocytes
Which class of the phylum Cnidaria occurs ONLY as a
medusa?
a) Hydrozoa
b) Scyphozoa
c) Anthozoa
,d) Only A and C are correct
e) Only A and B are correct - ----Answers ---- Scyphozoa
A land snail, a clam, and an octopus all share
a) A mantle
b) A radula
c) Gills
d) Embryonic torsion
e) Distinct Cephalization - ----Answers------A mantle
A pearl results from calcium carbonate layers being layed
down around a foreign particle. These layers of calcium
carbonate are produced by
a) The mesoderm
b) The cnidocyte
c) The endoderm
,d) The mantle
e) The visceral mass - ----Answers------The mantle
A jointed exoskeleton is the most striking characteristic of
phylum
a) Annelida
b) Nematoda
c) Porifera
d) Molluska
e) Arthropoda - ----Answers ----- Arthropoda
An arthropod has all the following characteristics except
a) protostome development
b) bilateral symmetry
, c) pseudocoelom
d) 3 embryonic germ layers
e) true tissue - ----Answers ----- pseudocoelom
starfish, sea lilies, feather stars, sea urchins, sea
cucumbers, and sand dollars all belong to what phylum
a) Nematoda
b) Mollusca
c) Allelida
d) Echinodermata
e) Arthropoda - ----Answers ----- Echinodermata
Which of these animals has a gastrovascular cavity?
a) birds
b) hydra
Actual University Exam Questions & Verified Correct
Answers | Updated & Comprehensive Study Resource
Which of the following are NOT found in sponges?
a) Cnidocytes
b) Spicules
c) Amoebocytes
d) Spongocoela
e) Choanocytes - ----Answers ----- Cnidocytes
Which class of the phylum Cnidaria occurs ONLY as a
medusa?
a) Hydrozoa
b) Scyphozoa
c) Anthozoa
,d) Only A and C are correct
e) Only A and B are correct - ----Answers ---- Scyphozoa
A land snail, a clam, and an octopus all share
a) A mantle
b) A radula
c) Gills
d) Embryonic torsion
e) Distinct Cephalization - ----Answers------A mantle
A pearl results from calcium carbonate layers being layed
down around a foreign particle. These layers of calcium
carbonate are produced by
a) The mesoderm
b) The cnidocyte
c) The endoderm
,d) The mantle
e) The visceral mass - ----Answers------The mantle
A jointed exoskeleton is the most striking characteristic of
phylum
a) Annelida
b) Nematoda
c) Porifera
d) Molluska
e) Arthropoda - ----Answers ----- Arthropoda
An arthropod has all the following characteristics except
a) protostome development
b) bilateral symmetry
, c) pseudocoelom
d) 3 embryonic germ layers
e) true tissue - ----Answers ----- pseudocoelom
starfish, sea lilies, feather stars, sea urchins, sea
cucumbers, and sand dollars all belong to what phylum
a) Nematoda
b) Mollusca
c) Allelida
d) Echinodermata
e) Arthropoda - ----Answers ----- Echinodermata
Which of these animals has a gastrovascular cavity?
a) birds
b) hydra
