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

b. retinoic acid

c. retinol

d. retinalogical

How are the tortoises that darwin observed on the galápagos islands similar to the anoles that losos studied

Food provides molecules that serve as fuel and building material for all organisms. plants undergo photosynthesis and make their own food. other organisms, like us and the horse seen above, are consumers and eat food. how do all organisms use food as fuel? be sure to include the name of the process in your answer. me.

During an experiment, readings for blood pressure in a persons body were found to be constant . however , when he measured by a different blood pressure cuff , the readings differed by 15 points for each reading. this difference indicates that the results are