The symbiotic relationship where one organism benefits and the other is unaffected is: MCQ with Answer and Explanation

Explanation:
Adenosine triphosphate (ATP) stores and transfers energy in cells via high-energy phosphate bonds. Hydrolysis of ATP to ADP releases energy for endergonic reactions. Glucose and NADH/FADH₂ are energy sources but not direct energy carriers usable by most enzymes; ATP is the immediate energy donor.

Explanation:
Cotyledons are seed leaves that store food (starch, proteins, lipids) for the developing embryo and may become photosynthetic after germination. Monocots have one, dicots two. Radicle is root, plumule shoot, seed coat protects.

Explanation:
Ethylene is a gaseous plant hormone that promotes fruit ripening (climacteric fruits like banana, apple), leaf abscission, and senescence. Auxin, gibberellin, and cytokinin primarily promote growth. Ethylene is used commercially to ripen fruits uniformly. It also stimulates the formation of abscission layers and inhibits stem elongation.