18.Which of the following are pneumatophores? [A] that grow in swampy areas have roots growing vertically upwards [B] the primary root is replaced by a large number of roots [C] are bushy roots in which thin, moderately branching roots [D] None of these Show Answer
Pneumatophores are specialized root structures that grow out from the water surface and facilitate the aeration necessary for root respiration in hydrophytic trees such as many mangrove species (e.g., Avicennia germinans and Laguncularia raecemosa), bald cypresses, and cotton (tupelo) gum (Nyssa aquatica).
