Which one of these exhibits gill slits at some stage of its development? a. all echinoderms b. all mollusks c. all cnidarians d. all chordates

i wish i could with all of them i can barley see the first one so here's the answer to the first one b

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.