10. In which of the following pairs of parts of a flowering plant is epidermis absent?

(a) Root tip and shoot tip

(b) Shoot bud and floral bud

(c) Ovule and seed

(d) Petiole and pedicel

(a) Root and shoot tip of an actively growing plant has high meristematic activity. The cells in this region are highly active and keep dividing. So, the cells do not get differentiated to epidermal tissue, so epiderm is is absent in root and shoot tips.