Which is not considered an active form of vitamin a?
a. retinal

b. retinoic acid

c. retinol

d. retinalogical

Vitamin A is a group of unsaturated nutritional organic compounds that includes retinol, retinal, retinoic acid

it is called the mitotic spindle

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.