Eye of the molluscan group that resembles vertebrate eye is:
Correct answer: D. Cephalopoda
- A. Bivalvia
- B. Gastropoda
- C. Pelecypoda
- D. Cephalopoda
Explanation
In cephalopodas, paired eyes are large, efficient and bulge from the dorsolateral sides of the head. They bear striking resemblance to those of a vertebrate because a cornea, iris, lens and retina are present. Their lens projects an inverted image on the retina just like the vertebrate eye. External muscle attachments enable limited movements of the eye. But the embryological development of the cephalopod eye is entirely different from that of the vertebrate eye, and hence they areo homologically different. The vertebrate eye is formed as an outgrowth of the brain, while the cephalopod eye is formed by an ectodermal invagination.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
Practise Biodiversity and Variety of Life
3,130 free Biodiversity and Variety of Life MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.