Practice question

MCQ

Question

Which of the following features is incorrect about bony fishes (Osteichthyes)?

Options

Choose one · Correct answer highlighted

They have a bony endoskeleton They have a two-chambered heart They lack an operculum Correct They use a swim bladder for buoyancy

Explanation

Bony fishes have an operculum (gill cover) to protect their gills.

Share this question

Discussion

Comments

0 comments

Please log in to join the discussion.

No comments yet. Be the first to start the discussion.

Related blogs

Guides and insights connected to this topic

Virology 24 Jan 2026

Crimean-Congo Hemorrhagic Fever Virus (CCHFV): Transmission, Replication, Pathogenesis, Clinical Features, Diagnosis, Treatment, and Prevention

Structure of Crimean-Congo Hemorrhagic Fever Virus Crimean-Congo hemorrhagic fever virus (– causative agent of CCHF) falls under the family...

Agricultural Microbiology 26 Aug 2024

Morphology of Flowering Plants

The diverse forms of life on Earth were initially described through observation (looking at things with the naked eye or through magnifying...

Biology XII Lab Manual 10 Oct 2026

Experiment 16: Flash Cards / Models / Specimens Showing Examples of Homologous and Analogous Organs

AIM To study homology and analogy with the help of models/charts of animals and models/charts/specimens of plants. PRINCIPLE Homologous organs are functionally dissimilar but anatomically or structurally similar. Different modes of life have modified the organs to enable survival...