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Aim : Why is photosynthesis so important? . Daily Catalyst : Why are we so concerned with plants, how do they help us survive? Homework : Text Pg. 240-245 Questions 1-5 on pg. 245 and vocab on pg. 240 . Plants. What are the differences between plant and animal cells?. Plant. Animal.
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Aim: Why is photosynthesis so important? Daily Catalyst: Why are we so concerned with plants, how do they help us survive? Homework: Text Pg. 240-245 Questions 1-5 on pg. 245 and vocab on pg. 240
What are the differences between plant and animal cells? Plant Animal Centrioles Small Vacuole Only Performs Respiration No cell wall Not Square Shape • Chloroplasts • Chlorophyll • Perform the process of Photosynthesis • Cell Wall • Large Vacuole • Also Performs Respiration to create ATP (mitochondria) • Square Shape
What is Photosynthesis? • Occurs in the Chloroplasts • CO2 + H2O + Sunlight O2 + H2O + C6H12O6
Aim: Why are plants so important for stability of the earth? Daily Catalyst: What are some of the important structures that plants have and why are they so important? Homework: Text Pg 252 Vocab and Pg 252-260 Questions 1-5 Quiz Thursday
List The 5 Characteristics of Plants • They perform photosynthesis to make GLUCOSE. • Can NOT move from place to place. • They have CELL WALLS for support. • They are MULTICELLULAR and have SPECIALIZED tissues. • Must have LIGHT, CO2, H2O, O2, and minerals.
Base your answers to the questions on the diagram below and on your knowledge of science. Thediagram represents a plant carrying out photosynthesis. Identify the source of energy for photosynthesis. State one way the plant uses the sugar that is produced in the leaves.
How can a tree take water from the ground and bring it up to all of its limbs? • It has vascular tissue • What is vascular tissue? • tube like cells that transport food & water through a plant.
How does vascular tissue help aplant? - allows plants to be large organisms since it enables them to transport important nutrients from one part of a plant to another.
What are the 2 kinds of vascular tissue? • XYLEM– carries H2o from roots (zylum) to leaves. Everything goes up. • PHLOEM –FOOD from leaves to (flowum) roots and vice versa. Can move in both directions.
What are the 2 kinds of plants? • Vascular = TRACHEOPHYTES = have roots, stems and leaves. Ex: trees, grasses 2. Non-vascular = BRYOPHYTES= NO roots, stems, or leaves. ex: mosses
Aim: Why are roots so important for plants? Daily Catalyst: What are the two main types of tissue found in a multicellular plant? Homework: Text Book Pg. 266 questions 1-18 Quiz Friday
What is a ROOT?? • organs of vascular plants. What are the FUNCTIONS of a root? • Anchor the plant • Collect water & minerals from the soil • Store food, vitamins, minerals
What are the 2 KINDS OF ROOTS? • TAP ROOT –Ex: carrot, radish, dandelion 2. FIBROUS ROOT –Ex: trees, grass
ROOT TIP DIAGRAM: • ROOT HAIR – absorbs H2O • CORTEX – stores food • EPIDERMIS – protective layer • ROOT CAP – protects root tip • PHLOEM – carries food • XYLEM – carries H2O up to leaves • GROWTH REGION – dividing cells, area of growth.
Label Me Tissue (Storage) Root Hair (Absorption) Phloem (Transport) Xylem (Transport) Cambium (Cell Division)
What is a STEM? • organ which connects roots & leaves. FUNCTIONS: • supports leaves for light • Stores food • Contain vascular tissue to transport food & water.
What are the TYPES OF STEMS? • HERBACEOUS • soft, green, flexible • live 1-2 years • can do photosynthesis ex: grass, tulips, weeds • WOODY • hard, brown, rigid • live many years • cannot do photosynthesis ex: shrubs, trees
What are the rings in a tree trunk? • layers of old xylem cells. • New xylem is formed every year by the CAMBIUM **Rings do not form in herbaceous stems.
What is a LEAF? • plant organ that produces food (glucose) by photosynthesis. LEAF DIAGRAM: • CUTICLE – waxy layer, prevents H2O loss • EPIDERMIS –clear,protective layer of cells • PALLISADE LAYER-most photosynthesis occurs here; cells w/lots of chloroplasts • SPONGY LAYER-little photosynthesis here • VEIN – vascular tissue (xylem & phloem) • STOMATE – pore for gas exchange • GUARD CELLS – open & close stomates