1.
Rhizopora is a mangrove plant.
2. Hydrilla is a submerged rooted plant.
3. Lac is a secretion from the insect species Laccifer lacca.
4. Pinctada vulgaris are saltwater oysters from which pearl is obtained.
5. Opuntia is a xerophyte which has phylloclade that is a stem modified to perform leaf functions.