ss Bio 1104 Test 2 Animal Diversity exam
2025/2026 – updated real questions with
100% correct answers | already graded
a
Ectoderm - CORRECT ANSWER -
One of the three primary (embryonic) germ layers formed during gastrulation. Ectoderm ultima
tely forms external structures such as the skin, hair, nails, and inner linings of the mouth and a
nus, as well as the entire nervous system. "outside"
Endoderm - CORRECT ANSWER -
Digestive tract lining; respiratory system; urinary bladder; digestive organs; liver; many glands "
inside"
Mesoderm - CORRECT ANSWER -
Embryonic tissue that forms tissues such as muscle, bone, and blood vessels (middle)
Cephilization - CORRECT ANSWER -
concentration of sensory organs and a brain in a defined head region -
> sensory organs nerve cells and organs for ingesting food
Coelom - CORRECT ANSWER -A fluid filled body cavity completely lined with mesoderm
Cnidocysts - CORRECT ANSWER -
All cnidarians have tentacles that are armed with rows of stinging
Protostome - CORRECT ANSWER -Animal whose mouth is formed from its blastopore
Deuterostome - CORRECT ANSWER -
animal whose anus is formed from the blastopore of a blastula
, Radial symmetry - CORRECT ANSWER -Symmetry about a central axis.
Bilateral - CORRECT ANSWER -can split into 2 along 1 plane
Coelomates - CORRECT ANSWER -Animals with a true coelom
(humans,annelids,arthropods)
Acoelomates - CORRECT ANSWER -Animals with no body cavity (flatworms)
Pseudocoelomates - CORRECT ANSWER -
An animal whose body cavity is not completely lined by mesoderm (roundworms, nematodes)
Digestive: incomplete - CORRECT ANSWER -a single opening to a pouch-
like cavity serves as both mouth and anus
Digestive: complete - CORRECT ANSWER -
A digestive tube with two openings, a mouth and an anus
Circ: none - CORRECT ANSWER -rely on diffusion
Circ: open - CORRECT ANSWER -heart,but limited blood vessels
Circ: closed - CORRECT ANSWER -heart and blood maintained entirely in vessels
Porifera - CORRECT ANSWER -
no germ layers or anything else, asymmetry, have both female and male parts, reproduce sexu
ally, water disperse the larve (sponge)
2025/2026 – updated real questions with
100% correct answers | already graded
a
Ectoderm - CORRECT ANSWER -
One of the three primary (embryonic) germ layers formed during gastrulation. Ectoderm ultima
tely forms external structures such as the skin, hair, nails, and inner linings of the mouth and a
nus, as well as the entire nervous system. "outside"
Endoderm - CORRECT ANSWER -
Digestive tract lining; respiratory system; urinary bladder; digestive organs; liver; many glands "
inside"
Mesoderm - CORRECT ANSWER -
Embryonic tissue that forms tissues such as muscle, bone, and blood vessels (middle)
Cephilization - CORRECT ANSWER -
concentration of sensory organs and a brain in a defined head region -
> sensory organs nerve cells and organs for ingesting food
Coelom - CORRECT ANSWER -A fluid filled body cavity completely lined with mesoderm
Cnidocysts - CORRECT ANSWER -
All cnidarians have tentacles that are armed with rows of stinging
Protostome - CORRECT ANSWER -Animal whose mouth is formed from its blastopore
Deuterostome - CORRECT ANSWER -
animal whose anus is formed from the blastopore of a blastula
, Radial symmetry - CORRECT ANSWER -Symmetry about a central axis.
Bilateral - CORRECT ANSWER -can split into 2 along 1 plane
Coelomates - CORRECT ANSWER -Animals with a true coelom
(humans,annelids,arthropods)
Acoelomates - CORRECT ANSWER -Animals with no body cavity (flatworms)
Pseudocoelomates - CORRECT ANSWER -
An animal whose body cavity is not completely lined by mesoderm (roundworms, nematodes)
Digestive: incomplete - CORRECT ANSWER -a single opening to a pouch-
like cavity serves as both mouth and anus
Digestive: complete - CORRECT ANSWER -
A digestive tube with two openings, a mouth and an anus
Circ: none - CORRECT ANSWER -rely on diffusion
Circ: open - CORRECT ANSWER -heart,but limited blood vessels
Circ: closed - CORRECT ANSWER -heart and blood maintained entirely in vessels
Porifera - CORRECT ANSWER -
no germ layers or anything else, asymmetry, have both female and male parts, reproduce sexu
ally, water disperse the larve (sponge)
