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,
, Question:
Incurrent Siphon (Mollusca) opening which draws water-bearing food particles into the cavity of a
Mollusk
Answer:
most open circulation some closed
Question:
Excurrent Siphon (Mollusca) a tube through which water exits the mantle cavity of a bivalve cultured
pearl Human places a bead inside the bivalve and retrieves it 6 months later
Answer:
Question:
Natural pearl an irritant causes the bivalve to spontaneously produce layers of nacre
Answer:
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 head, thorax, abdomen arthropod nervous system brain and ventral
nerve cord with ganglia
Answer:
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,
, Question:
Incurrent Siphon (Mollusca) opening which draws water-bearing food particles into the cavity of a
Mollusk
Answer:
most open circulation some closed
Question:
Excurrent Siphon (Mollusca) a tube through which water exits the mantle cavity of a bivalve cultured
pearl Human places a bead inside the bivalve and retrieves it 6 months later
Answer:
Question:
Natural pearl an irritant causes the bivalve to spontaneously produce layers of nacre
Answer:
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 head, thorax, abdomen arthropod nervous system brain and ventral
nerve cord with ganglia
Answer:
