A lab observation notes that a bath sponge remains flexible because its skeleton is mainly a network of protein fibers. The observation points to:
Correct Answer: C. spongin fibers
MCQ Collection
BS Zoology Semester Exam MCQs
Practice BS Zoology Semester Exam questions with answers and explanations.
Obelia alternates between an asexual polyp colony and a sexual medusa stage. The best answer is:
Correct Answer: D. metagenesis
A diagram in the course handout shows that a tapeworm body is divided into many reproductive units behind the scolex. Identify the related structure or process.
Correct Answer: B. proglottids
A student is revising Animal Diversity-I: a roundworm thrashes side to side rather than crawling with waves of circular muscles. What should the student write in the answer sheet?
Correct Answer: B. longitudinal muscles only
In museum study, a mussel pumps water across large gills that trap suspended food particles. The specimen or feature is best linked with:
Correct Answer: D. filter feeding with gills
For semester exam preparation, consider this situation: a sponge has specialized cells but lacks true tissues and organs. The correct conclusion is:
Correct Answer: C. cellular level of organization
During a Zoology practical, the body wall of Hydra develops from ectoderm and endoderm with mesoglea between them. Select the most accurate identification.
Correct Answer: D. diploblastic organization
While comparing invertebrate groups, many adult tapeworm units contain both male and female reproductive organs. The feature being tested is:
Correct Answer: A. hermaphroditism
In a specimen-based viva, the examiner describes this case: a tiny freshwater animal creates feeding currents using a wheel-like crown of cilia near the head. Choose the concept that fits it best.
Correct Answer: C. corona
A patient has intestinal ulcers and bloody diarrhoea after infection by Entamoeba histolytica. The best answer is:
Correct Answer: A. amoebic dysentery
A diagram in the course handout shows that a freshwater sponge survives an unfavorable season by forming resistant internal buds. Identify the related structure or process.
Correct Answer: A. gemmules
A student is revising Animal Diversity-I: a hydra responds to touch through a diffuse network of neurons rather than a centralized brain. What should the student write in the answer sheet?
Correct Answer: B. nerve net