Pax-6 usually causes the production of a type of light-receptor pigment. in vertebrate eyes, though, a different gene (the rh gene family) is responsible for the light-receptor pigments of the retina. the rh gene, like pax-6, is ancient. in the marine ragworm, for example, the rh gene causes production of c-opsin, which to regulate the worm’s biological clock. what most likely accounts for vertebrate vision?

the real answer is b. scintillation counter

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

idk and i also need to know where are those bio brainy acts lol