SAND AND SALT LAB.

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Presentation transcript:

SAND AND SALT LAB

SCIENCE 7 TOPIC SIX

THE THREE FUNCTIONS OF ROOTS

1. Anchor the plant in the ground

2. Absorb water and minerals from the ground

3. Store plant’s nutrients

XYLEM AND PHLOEM DIFFERENCES

Xylem is for upward movement of materials Phloem is for downward movement of materials

IMPORTANCE OF ROOT HAIRS

Root hairs greatly increase the surface area of the roots of a plant so it can absorb more nutrients

THE FUNCTIONS OF THE STEM

Support of the plant

Transport nutrients though the plant

Help hold leaves up toward the light

Store some of the plants nutients

HERB AND WOODY STEM DIFFERENCES……

Woody stems are found mostly as perennials

Herb stems are found mostly as annuals

Woody stems have a cambium layer that separates the xylem from the phloem

Herb stems have their xylem and phloem tubes grouped together

Woody stems are not pliable

Herb stems are pliable

THREE TYPES OF ROOTS

1. Fibrous Root

2. Tap Root

3. Above Ground Root

Aireal Epiphytes

The Hydration Lab