A lab observation notes that a public health lesson links roundworm infection with poor sanitation and contaminated soil. The observation points to:
Correct Answer: A. Ascaris eggs survive in contaminated soil
MCQ Collection
Animal Diversity-I (Invertebrates) MCQs
Practice Animal Diversity-I (Invertebrates) questions with answers and explanations.
A sponge and a cnidarian are compared in class. The sponge differs most clearly because it has cellular-level organization and choanocyte-based filter feeding. In an exam answer, the key reason is: (201)
Correct Answer: C. cellular-level organization with choanocytes
A student wants to avoid rote memorization. After reading that a flatworm and a roundworm are placed side by side. the roundworm is recognized by a cylindrical body, complete gut, and pseudocoelom., the correct concept is: (217)
Correct Answer: D. cylindrical body with pseudocoelom and complete gut
A learner makes a note: a small marine suspension feeder captures particles using a crown of ciliated tentacles around the mouth. The missing scientific idea is:
Correct Answer: B. lophophore
For semester exam preparation, consider this situation: a modern phylogeny groups insects and nematodes together more closely than older body-cavity classifications suggested. The correct conclusion is:
Correct Answer: B. arthropods are ecdysozoans
A flatworm and a roundworm are placed side by side. The roundworm is recognized by a cylindrical body, complete gut, and pseudocoelom. In an exam answer, the key reason is: (202)
Correct Answer: A. cylindrical body with pseudocoelom and complete gut
A student wants to avoid rote memorization. After reading that a mollusc and an annelid both show trochophore larvae in many species, but their adult body plans are very different., the correct concept is: (218)
Correct Answer: D. trochophore larva as a developmental link
A tiny stalked filter feeder has both mouth and anus opening within the circle of tentacles. The best answer is:
Correct Answer: D. anus inside the tentacle crown
A diagram in the course handout shows that a teacher asks for one developmental clue linking molluscs with annelids. Identify the related structure or process.
Correct Answer: A. molluscs and annelids share trochophore larvae in many groups
A mollusc and an annelid both show trochophore larvae in many species, but their adult body plans are very different. In an exam answer, the key reason is: (203)
Correct Answer: C. trochophore larva as a developmental link
A student wants to avoid rote memorization. After reading that an arthropod and a nematode are grouped together in modern discussions because both shed an outer cuticle during growth., the correct concept is: (219)
Correct Answer: C. ecdysis of a cuticle
During a Zoology practical, a minute animal from an unusual phylum is found attached to lobster mouthparts. Select the most accurate identification.
Correct Answer: A. life on lobster mouthparts