BIO 172 UH Manoa Exam 2 2026
Questions and Answers
Animals - Correct answer-Multicellular eukaryotes
Heterotrophs: Ingest their food
Lack Cell Walls
Body held together by structural proteins
Collagen - Correct answer-Make up connective tissues (fibers)
Flexible and high tensile (stretching)
Skin - Correct answer-Dense irregular arrangement of collagen
Ligament - Correct answer-Collagen arranged in sheets
(Connects Bones)
Tendon - Correct answer-Cable-like arrangement of collagen
(Connects muscle to bone)
Zygote - Correct answer-Fertilized egg
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,(Sperm+Egg=Zygote)
Undergoes rapid cell division called cleavage
Germ Layers - Correct answer-Give rise to tissues and organs of animal embryo
Blastula - Correct answer-Cell that has undergone many cell cleavages
Hollow blastula undergoes gastrulation, forming gastrula (has layers of embryonic
tissues)
Ectoderm - Correct answer-Germ layer covering embryo surface
Endoderm - Correct answer-Innermost germ layer and lines developing digestive
tube (aka=Archenteron)
Diploblastic - Correct answer-Animals that exhibit both ectoderm and endoderm in
the embryo
(Corals, jellyfish)
Triploblastic - Correct answer-Animals that have intervening Mesoderm layer
(bilaterians)
Bilaterians - Correct answer-All Multicellular animals other than sponges and
cnidarians
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, Exhibit bilateral symmetry and cephalization
Cephalization - Correct answer-Organization of senses and locomotion toward
head region
Larva - Correct answer-Sexually immature and anatomically distinct from the
adult, undergoes metamorphosis
Juvenile - Correct answer-Resembles an adult, but not sexually mature
Cambrian explosion - Correct answer-535-525 million years ago, marks earliest
fossil appearance of many animal major groups
Hox Genes - Correct answer-Control the development of body form (Hox Gene
"__" can tell to form an arm)
Protosome - Correct answer-Cell proliferation by spiral cleavage
Coelom forms within the middle tissue germ layer
Initial opening of gut becomes the mouth
Deuterostome - Correct answer-Cell proliferation by radial cleavage
Coelom forms from outpocket of the middle tissue germ layer
Initial opening of gut becomes the anus
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Questions and Answers
Animals - Correct answer-Multicellular eukaryotes
Heterotrophs: Ingest their food
Lack Cell Walls
Body held together by structural proteins
Collagen - Correct answer-Make up connective tissues (fibers)
Flexible and high tensile (stretching)
Skin - Correct answer-Dense irregular arrangement of collagen
Ligament - Correct answer-Collagen arranged in sheets
(Connects Bones)
Tendon - Correct answer-Cable-like arrangement of collagen
(Connects muscle to bone)
Zygote - Correct answer-Fertilized egg
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,(Sperm+Egg=Zygote)
Undergoes rapid cell division called cleavage
Germ Layers - Correct answer-Give rise to tissues and organs of animal embryo
Blastula - Correct answer-Cell that has undergone many cell cleavages
Hollow blastula undergoes gastrulation, forming gastrula (has layers of embryonic
tissues)
Ectoderm - Correct answer-Germ layer covering embryo surface
Endoderm - Correct answer-Innermost germ layer and lines developing digestive
tube (aka=Archenteron)
Diploblastic - Correct answer-Animals that exhibit both ectoderm and endoderm in
the embryo
(Corals, jellyfish)
Triploblastic - Correct answer-Animals that have intervening Mesoderm layer
(bilaterians)
Bilaterians - Correct answer-All Multicellular animals other than sponges and
cnidarians
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
, Exhibit bilateral symmetry and cephalization
Cephalization - Correct answer-Organization of senses and locomotion toward
head region
Larva - Correct answer-Sexually immature and anatomically distinct from the
adult, undergoes metamorphosis
Juvenile - Correct answer-Resembles an adult, but not sexually mature
Cambrian explosion - Correct answer-535-525 million years ago, marks earliest
fossil appearance of many animal major groups
Hox Genes - Correct answer-Control the development of body form (Hox Gene
"__" can tell to form an arm)
Protosome - Correct answer-Cell proliferation by spiral cleavage
Coelom forms within the middle tissue germ layer
Initial opening of gut becomes the mouth
Deuterostome - Correct answer-Cell proliferation by radial cleavage
Coelom forms from outpocket of the middle tissue germ layer
Initial opening of gut becomes the anus
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
