(9) PLANT STRUCTURE/ PHYSIOLOGY (13-16)

What is the function of the leaves?

solar panels that capture sunlight and convert solar energy into chemical energy in the form of sugars using carbon dioxide and water

What are the three major regions of a leaf?

the epidermis, the mesophyll, and the veins (vascular bundles)

Epidermis (Cuticle) function

Prevents water loss

Epidermis (Epidermal Cells) function

Protective layer

Epidermis (Guard Cells and Stomates) function

gas exchange

Mesophyll (Palisade Layer) function

Photosynthesis

Mesophyll (Spongy Layer) function

Photosynthesis and gas exchange

Veins (Vascular Bundles) functions

Transport

What regulates the guard cells?

Turgor pressure

What is occurring in the guard cells when the stomata are closed?

The Guard cells are empty

What is occurring in the guard cells when the stomata are open?

The gaurd cells are full

Why are pine needles shaped this way?

for living in arid conditions.

What adaptation do they have to minimize water loss?

have their stomata recessed within the surface of the leaf

What causes Chlorosis (yellowing of leaves)

Lack of N or K

What causes Deep green or purple pigmentation

Lack of P or N

What causes stunted growth

Lack oh P or N

What causes Necrosis

Lack of K