Page 131 - General and Inorganic Chemistry for Advanced Secondary Schools Students Book Form Five and Six

Biology for Secondary Schools

Leaves

FOR ONLINE READING ONLY

Stem
Roots
(a) (b)

Figure 6.9: Onion bulb (a) whole (b) cut in half

Tuber: This is a fleshy storage organ formed from either a stem or a root. An
examples of a stem tuber is Irish potato while an example of a the root tuber is
sweet potato (See Figure 6.10).
Eyes

(a) (b)
Figure 6.10: Tubers (a) stem tuber (Irish potato) (b) root tuber (sweet potato)

Taproot: Some taproots such as those of carrot, sugar beet, and beetroot are
specialised for food storage (See Figures 6.11).

Corm: This is an underground storage

organ formed from the plant stem. It
is a mass of solid tissues with a dry

papery cover made of modified leaves.
Examples of corms are yams, cocoyams
and crocuses (See Figure 6.12).
(a) (b) (c)
Figure 6.11: Examples of taproots (a)
carrot (b) sugar beet (c) beetroot

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