20 Questions
What is the main advantage of the dorsoventrally flattened body plan of flatworms?
Maximizes the surface area to volume ratio for efficient gas exchange
What type of symmetry do flatworms exhibit?
Bilateral symmetry
Which of the following is not a characteristic of the digestive system in flatworms?
Consists of a true coelom (body cavity) for organ development
What is the function of the protonephridia (flame cells) in the excretory system of flatworms?
Excrete waste products from the organism's body
Which of the following is not a common mode of locomotion in flatworms?
Bipedal walking
What is the main function of the rhabdites in the epidermis of flatworms?
Secrete mucus for locomotion and defense
Which of the following is a characteristic of the nervous system in flatworms?
Exhibits cephalization with a concentration of sensory organs and nervous control in one end
Which of the following is not a feature of the parenchyma in flatworms?
Provides a true coelom (body cavity) for organ development
What is the primary mode of reproduction in most free-living flatworms (class Turbellaria)?
Hermaphroditic, with each individual producing both male and female gametes
What is the function of the pharynx in the digestive system of flatworms?
Serves as the primary site of extracellular digestion
Which of the following is a structure that aids in attachment for the class Monogenea?
Haptor
Which of the following statements about the class Cestoda is correct?
They obtain nutrients via diffusion.
What is the function of the scolex in the class Cestoda?
It attaches the tapeworm to the intestinal mucosa of the host.
Which of the following statements about the life cycle of the class Trematoda is correct?
They have an indirect life cycle and require two hosts.
What is the function of the oral sucker and acetabulum in the class Trematoda?
They prevent dislodgement and aid in feeding.
Which of the following is a structure found in the class Monogenea that aids in attachment to the host?
Prohaptor
What is the function of the tegument in the class Trematoda?
It protects against host digestive enzymes and facilitates gas exchange.
Which of the following statements about the reproductive strategy of the class Trematoda is correct?
Copulation and cross-fertilization are common.
What is the function of the protonephridia in the class Trematoda?
It excretes water and waste metabolites.
Which of the following statements about the life cycle of the class Trematoda is correct?
The miracidium larva is the only free-swimming larval stage.
Explore the defining characteristics of Phylum Platyhelminthes (Flatworms), focusing on their dorsoventrally flat structure, advantages, and disadvantages. Learn about their triploblastic & acoelomate nature, lack of body cavity, and the arrangement of parenchymal tissue. Test your knowledge on the 3 tissue layers that make up these organisms.
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