Barnacles are sessile filter feeders but unlike bivalves they have internal fertilization.How do they solve this problem?
A)The filter sperm from the water column.
B)They get fertilized during free living larval stages.
C)They are only capable of asexual reproduction.
D)They are hermaphrodites with especially long penises.

Question

Quizplus · Accepted Answer

Barnacles are hermaphrodites, meaning each individual has both male and female reproductive organs. They have notably long penises, which allow them to reach out to neighboring barnacles for internal fertilization, despite being sessile (fixed in one place). This adaptation solves the problem of internal fertilization without the need for mobility.

Barnacles Are Sessile Filter Feeders but Unlike Bivalves They Have