Bio 112 Exam Verified Exam Questions and Answers Latest update
2026/2027
Question:
Rotifera
Answer:
Phylum of worms with a crown of cilia surrounding the mouth
Question:
What is the main function of the coelom in organisms?
Answer:
Cushions internal organs
Question:
How does the coelom allow organs to grow and move independently of the body wall?
Answer:
Organs grow and move independent of body wall
Question:
What role does the coelom play in the complexity of the gut?
Answer:
Muscular gut - more complex
Question:
In what way does the coelom act as a support structure in organisms?
Answer:
Acts as a hydrostatic skeleton for support
Question:
What are the characteristics of Phylum Mollusca?
Answer:
Soft body, foot, visceral mass and mantle covering the body that may secrete a shell, most open
circulation some closed
,Question:
Incurrent Siphon (Mollusca)
Answer:
opening which draws water-bearing food particles into the cavity of a Mollusk
Question:
Excurrent Siphon (Mollusca)
Answer:
a tube through which water exits the mantle cavity of a bivalve
Question:
cultured pearl
Answer:
Human places a bead inside the bivalve and retrieves it 6 months later
Question:
Natural pearl
Answer:
an irritant causes the bivalve to spontaneously produce layers of nacre
Question:
Cephalopoda (class)
Answer:
Mollusca (phylum); advanced eye is present, closed circulaory system, extremely intelligent, ex.
squids and octopi
Question:
What are the key characteristics of Phylum Arthropoda?
Answer:
Jointed appendages; segmented body; exoskeleton made of chitin
Question:
Name some examples of organisms belonging to Phylum Arthropoda.
Answer:
Lobsters, centipedes, butterflies, spiders
, Question:
Segmentation of an arthropod
Answer:
head, thorax, abdomen
Question:
arthropod nervous system
Answer:
brain and ventral nerve cord with ganglia
Question:
Structure of compound eyes in arthropods
Answer:
Comprised of many adjacent photoreceptors each with their own protective cornea and focusing lens
Question:
Function of compound eyes in arthropods
Answer:
Each contributes a 'pixel' to the image
Question:
book lungs
Answer:
Organs of gas exchange in spiders, consisting of stacked plates contained in an internal chamber.
Question:
Types of gas exchange in arthropods
Answer:
Gills, Book Lung, Tracheae
Question:
Spiracle
Answer:
the external opening of the trachea in insects
2026/2027
Question:
Rotifera
Answer:
Phylum of worms with a crown of cilia surrounding the mouth
Question:
What is the main function of the coelom in organisms?
Answer:
Cushions internal organs
Question:
How does the coelom allow organs to grow and move independently of the body wall?
Answer:
Organs grow and move independent of body wall
Question:
What role does the coelom play in the complexity of the gut?
Answer:
Muscular gut - more complex
Question:
In what way does the coelom act as a support structure in organisms?
Answer:
Acts as a hydrostatic skeleton for support
Question:
What are the characteristics of Phylum Mollusca?
Answer:
Soft body, foot, visceral mass and mantle covering the body that may secrete a shell, most open
circulation some closed
,Question:
Incurrent Siphon (Mollusca)
Answer:
opening which draws water-bearing food particles into the cavity of a Mollusk
Question:
Excurrent Siphon (Mollusca)
Answer:
a tube through which water exits the mantle cavity of a bivalve
Question:
cultured pearl
Answer:
Human places a bead inside the bivalve and retrieves it 6 months later
Question:
Natural pearl
Answer:
an irritant causes the bivalve to spontaneously produce layers of nacre
Question:
Cephalopoda (class)
Answer:
Mollusca (phylum); advanced eye is present, closed circulaory system, extremely intelligent, ex.
squids and octopi
Question:
What are the key characteristics of Phylum Arthropoda?
Answer:
Jointed appendages; segmented body; exoskeleton made of chitin
Question:
Name some examples of organisms belonging to Phylum Arthropoda.
Answer:
Lobsters, centipedes, butterflies, spiders
, Question:
Segmentation of an arthropod
Answer:
head, thorax, abdomen
Question:
arthropod nervous system
Answer:
brain and ventral nerve cord with ganglia
Question:
Structure of compound eyes in arthropods
Answer:
Comprised of many adjacent photoreceptors each with their own protective cornea and focusing lens
Question:
Function of compound eyes in arthropods
Answer:
Each contributes a 'pixel' to the image
Question:
book lungs
Answer:
Organs of gas exchange in spiders, consisting of stacked plates contained in an internal chamber.
Question:
Types of gas exchange in arthropods
Answer:
Gills, Book Lung, Tracheae
Question:
Spiracle
Answer:
the external opening of the trachea in insects
