Which of the following statements is accurate regarding opsin evolution?
A) The common ancestor of jellyfish and humans had only one type of opsin.
B) In deuterostomes, r-opsins evolved into the primary photoreceptors.
C) The earliest bilaterians had three types of opsins.
D) none of the above

Question

Quizplus · Accepted Answer

The statements provided about opsin evolution are not accurate. Opsins are a group of light-sensitive proteins found in photoreceptor cells, and their evolution is complex, involving diversification and specialization across different lineages. The common ancestor of jellyfish and humans likely had a more complex set of opsins than just one type, r-opsins are not the primary photoreceptors evolved in deuterostomes (instead, c-opsins are significant in vertebrate vision), and the assertion that the earliest bilaterians had three types of opsins oversimplifies the evolutionary history of opsins.

Which of the Following Statements Is Accurate Regarding Opsin Evolution