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Bio Lab Wksht & HW Questions 60

Bio Lab Wksht & HW Questions 60 - cylinder inside...

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55 mitotically and give rise to new cells which can then subsequently become specialized for particular functions in specific tissues. There are two types of meristems: apical meristems and lateral meristems. Apical meristems occur at the tips of the roots and shoots (Figure 2). Their primary function is to provide cells that permit growth and elongation of the plant body. Apical meristems give rise to the primary tissues of the plant forming the primary plant body, the dermal, vascular and ground tissue systems. Lateral meristems are responsible for lateral growth (increases in girth) and they produce the secondary tissues (e.g.: wood and cork). Lateral meristems are not located at the tips of the root or shoot, but rather occur as a
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Unformatted text preview: cylinder inside of the elongated portion of stems or roots, just below the epidermis (Figure 2). Figure 2: Spatial representation of the apical and lateral meristematic regions in a plant. Shoot Tissues The shoot is comprised of both the stem and leaves. The primary function of the stem is to serve as the axis that supports the leaves. Stems may be relatively flexible (e.g. bean plant) or inflexible (e.g. tree trunk) and are generally, but not always, photosynthetic. The major function of the leaf is to provide a broad surface area that can be used to capture light required for photosynthesis. Gas exchange (CO 2 and O 2 ) is also mediated by the leaf....
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