DENDROLOGY

Detailed explanation-1: -The correctly matched pair is onion-bulb. Onion is a simple tunicated layered bulb while ginger is a straggling rhizome having uniparous cymebranching with suymphodial axis. While yeast reproduces by budding and Chlamyudomonas by zoospores.

Detailed explanation-2: -The onion bulb is a modified stem with a large number of fleshy scale leaves. Taproot originates from plant roots, but fibrous roots grow from stems and leaves instead of radicals. Onion roots are short-lived and numerous and a bundle of fibrous roots are present at the base of the bulb.

Detailed explanation-3: -Bulb: The modified stem of onion is Bulb. It is a very short disc-shaped underground stem. It bears fleshy scale leaves that store food.