TAMU BIOLOGY 112 ACTUAL EXAM QUESTIONS

TAMU BIOLOGY 112 (ACTUAL / ) EXAM QUESTIONS

AND VERIFIED CORRECT ANSWERS

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

• / 4

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 2 / 4

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

• protostome development

• bilateral symmetry
• / 4

• pseudocoelom

• 3 embryonic germ layers

• 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?

• birds

• hydra
• / 4