You find a green organism in a pond near your house and believe it is a plant, not an alga. the mystery organism is most likely a plant and not an alga if it a. contains chloroplasts b. is surrounded by a cuticle c. does not contain vascular tissue d. has cell walls that are comprised largely of cellulose

I believe that the mystery organism is most likely a plant and not an alga if it is surrounded by a cuticle.  Thus the answer is B.
Alga and plats are similar in that they can produce their won food from nutrients and sunlight by a process called photosynthesis. The main difference is in their complexity, such that algae are simple organisms, sometimes unicellular, and even the largest types are relatively simple in structure. Green algae does not contain cuticle. 

I’m not exactly sure what your trying to ask, but if it’s how an organelle is similar to a body system or a part a nucleus is like a in function. but i don’t fully understand what you’re trying to ask

Nine months old i think but i’m not that sure