Eyes on the skin. In the teamâs first experiment, the scientists were looking to see whether UV light instigated a calcium signaling response. They found nothing. But guessing that the skin might sense light like the eyes do, they added retinal, a co-factor of opsin receptors including rhodopsin.
Economy shipping takes 1 to 10 business days within the United States and 11 to 20 business days for international. Exact time depends on how far the package must travel. Standard international shipping takes 5 to 10 days.
Answers (1) There is no service called Economy shipping. eBay uses general terms like economy, standard, and expedited to categorize services by the delivery time. Economy refers to the slowest services, like Parcel Select and Media Mail.