Page 108 - Science Course 1 (Book 1)

Mo4-L1a: How do Plants Survive?

Some plants, such as mosses and hornworts, have The stomata are small openings in the surfaces of
rootlike structures called rhizoids. most plant leaves.

Water vapor, carbon dioxide, and oxygen can
Rhizoids are structures pass into and out of a leaf through stomata.
that anchor a plant but
do not transport water
and minerals.

Stems help support the leaves and flowers and have
tissues that help carry water and minerals to a plant’s
leaves.

Key Concept
How do Plants Survive?
How do plant structure such roots, stem,
and leaves ensure a plant’s survival?
The two main types of stems are :

• woody stems
• herbaceous stems.

Terminal Bud
Bud Scales Terminal Bud

Lateral Bud
Smooth Outer
Rough Outer Skin
Skin

Leaf Scar

Node
Woody Stem Herbaceous Stem

In most plants, leaves are the major sites for
photosynthesis.

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