Free swiming larvae are produced during the lifetimes of:
Correct answer: B. Annelida
- A. Coelenterate
- B. Annelida
- C. Porifera
- D. Arthropods
Explanation
Free-swimming larvae are produced during the lifetimes of some annelids, particularly in the class Polychaeta. Annelids are segmented worms, and the class Polychaeta is the largest and most diverse group within the phylum Annelida.In many polychaete species, the life cycle includes a larval stage known as the trochophore larva. The trochophore larva is a free-swimming, planktonic larval form that hatches from fertilized eggs. It is typically ciliated and has a ring of cilia around its body, which it uses for locomotion and feeding. The cilia create a characteristic rotating band, resembling a "trochus," hence the name "trochophore."
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.