BELL WORK (Buff Binder): Copy the question below and write your entire answer: Gametes produced by flowers are used to carry out what function? Transportation Photosynthesis Gravitropism Reproduction

Quiz retake Before The test on Friday

TELPAS Describe the parts and processes involved in a plant’s response, reproductive, and transport systems, and explain how all three systems work together to help a plant maintain homeostasis. Describe the parts and processes involved in a plant’s response, reproductive, and transport systems, and explain how all three systems work together in the life cycle of a plant

Set up today’s page… YES, Cornell notes! Page: 70 Date: 2-22-15 Title: Plant Transport Essential Question: How do the support and transport systems help plants maintain homeostasis? YES, Cornell notes!

Today we’re going to look at how plants maintain homeostasis.

STRUCTURE & SUPPORT

Roots: Hold plant in position Absorb water and minerals from the soil Contain specialized cells for water intake

(Wheat seed) Root hairs Fragile parts of cells that grow from the main root They massively increase the surface area for absorption

Root hair cells (x150)

Stems: Support structures connect and carry water & nutrients between roots and leaves

TRANSPORT SYSTEM

Vascular tissue: specialized tissues used to move water and nutrients throughout a plant

Xylem: cells that carry water up from the roots Phloem: cells that transport food (from photosynthesis) down from the leaves

Read your notes, highlight important words! 2 minutes End www.A6training.co.uk

What about leaves?

Leaves: organs that perform photosynthesis and contain vascular tissue

Cuticle: a thick waxy layer that protects against injury and water loss

GAS EXCHANGE Leaves are designed to allow carbon dioxide to get to the main chlorophyll layer at the top of the leaf They have small holes called stomata on the under surface Each hole is open & closed by 2 guard cells

Stoma: an opening on the underside of a leaf that allows carbon dioxide and oxygen to diffuse (move) into and out of the leaf Stomata= plural form Guard cells: specialized cells that control the opening and closing of stomata Color your picture!

Each opening is controlled by two guard cells. closed open

gas exchange in the leaf oxygen Guard cell Carbon dioxide

Transports water and sugar to stem and roots Conserves water Photosynthesis Transports water and sugar to stem and roots Structures of the Leaf

Why do stomata open and close?

Gas exchange

OPEN = when carbon dioxide is needed for photosynthesis Stomata open and close at different times of the day OPEN = when carbon dioxide is needed for photosynthesis CLOSED = to conserve water

Transpiration: the loss of water through leaves (specifically the stoma)

Read your notes, highlight important words! 2 minutes End www.A6training.co.uk

Transpiration Video

Debrief/Summary: Explain how a plant might respond to each of the following situations… drought (not enough water) flood (too much water) extra carbon dioxide in the air due to some crazy person singing to their plants not enough carbon dioxide in the air