GENERAL HISTOLOGY

Detailed explanation-1: -A bipinnaria is the first stage in the larval development of most starfish. The bipinnaria is free-living, swimming as part of the zooplankton. Movement and feeding are accomplished by the bands of cilia. Eventually, three additional arms develop at the front end of the larva at this point it becomes a brachiolaria.

Detailed explanation-2: -Final answer: Bipinnaria is the larva of Echinodermata.

Detailed explanation-3: -The embryo divides until it morphs into a peanut shape, which soon develops adhesive knobs that help it to temporarily attach to surfaces such as algae. At that stage, the budding starfish is a larva that can swim.

Detailed explanation-4: -This type of larva is a characteristic of the class Asteroidea. Early Bipinnaria appears like a hypothetical dipleurula. It has an oval body without arms and ciliary bands for locomotion. It has a well developed alimentary canal for feeding and grows to become bipinnaria.

Detailed explanation-5: -Brachiolaria Larva: This type of larva (Fig. 21.39E) is present in Asteroidea and is regarded as a modified form of bipinnaria larva.