Aim: How are plants adapted to perform photosynthesis?

1st lets look at us. How are we adapted for Heterotrophic nutrition?

Where does photosynthesis happen? Plants  Leaf  Cell  Chloroplast

Where in the leaf does photosynthesis happen? Cuticle Keeps in moisture Palisade Photosynthetic cells Absorb light Spongy layer Photosynthetic cells Allow gas passage

How are materials transported in plants?

How do H2O and nutrients get into the leaf?

Water and nutrients enter the plant though… The ROOTS

TRANSPORTS WATER TO LEAF: Xylem Root pressure, capillary action (cohesion), transpiration Transpiration- evaporation of water from leaves

How are sugars (nutrients) transported from Leaves (source) to the roots (sink)? Phloem

What sort of materials are transported by the phloem? Sugars (sucrose) minerals Amino acids Hormones

How does CO2 get inside the leaf? OPENINGS Called STOMATA

How are stomata opened and closed? Guard Cells

Should the stomata always be open? WATER VAPOR

What happens if they are always open? IT WILTS

When should the guard cells open the stomata When should the guard cells open the stomata? When should they close them?

Humid day O2 CO2 Dry Sunny day OPEN CLOSED

The stomata maintain _______ homeostasis. WATER

The process by which excess water leaves a plant through the stomata is known as Locomotion (3) hydrolysis Photosynthesis (4) transpiration