Shoot System (Leaving Cert Biology): Flashcards

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Shoot System
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What is the shoot system?

Part of plant that grows above ground

Components of shoot system

Stem, leaves, flowers, seeds

Support function of stems

Support aerial parts of plant

Transport function of stems

Transport water, minerals, nutrients between leaves & roots

Stem food storage example

Potatoes

Green stem function in monocots

Photosynthesis (e.g. grass stems)

What is a node?

Part on stem where new branches and leaves grow

What are internodes?

Areas between nodes where no branches form

Lenticels gas exchange

O2O_2 in; CO2CO_2 & water vapour out

Stomata gas exchange

CO2CO_2 in; O2O_2 out (more O2O_2 released)

Vascular bundle arrangement in dicots

Ring formation; xylem towards inside

Vascular bundle arrangement in monocots

Scattered at random

What is a petiole?

Stalk of the leaf

What are sessile leaves?

Leaves joined directly to stem (no petiole)

What is parallel venation?

Veins run parallel; found in monocots (e.g. grasses)

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