Biology

Question 1

Ichthyology

Answer 1

is the branch of zoology devoted to the study of fish, including bony fish (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha). According to FishBase, 33,400 species of fish had been described as of October 2016, with approximately 250 new species described each year.

Question 2

How does rhodopsin work?

Answer 2

Rhodopsin, a visual pigment found in the rod photoreceptor cells of the retina (rods which only help with intensity, not color), is responsible for converting photons into chemical signals that stimulate biological processes in the nervous systems of humans and other vertebrate animals, allowing them to sense light.