Plant Structure and Function PDF

Lesson 2.1: Plant structure and function. Book: Unit 5- Module 19- Lesson 2 Objectives: What do you know about plants? What do you want to know? Nearpod  Plant Cells Plant cells are identifiable by their cell walls and large central vacuole. Plants have m...

Lesson 2.1: Plant structure and function. Book: Unit 5- Module 19- Lesson 2 Objectives: What do you know about plants? What do you want to know? Nearpod  Plant Cells Plant cells are identifiable by their cell walls and large central vacuole. Plants have many types of cells adapted for specific purposes.  Plant cells are 3 types Parenchyma Cholenchyma Sclerenchyma  Three types of plant cells form most plant tissues: 3.2.2 Identify the major types of plant tissues to include meristematic, dermal, vascular and ground  Plant Tissue are 4 types Meristem Dermal Vascular Ground A tissue is a group of cells that work together to perform a function. A plant tissue can be composed of one or many types of cells. Meristematic Tissue  Plant Tissues Dermal Tissue—The Epidermis The layer of cells that makes up the outer covering on a plant is the epidermis. Epidermal cells resemble pieces of a jigsaw puzzle with interlocking ridges and dips. Prevents water loss. Prevents bacteria and microorganisms from entering the plants.  Plant Tissues Dermal Tissue—The Epidermis The epidermis has several adaptations to protect the plant and prevent water loss. Changes in the shape of guard cells result in the opening and closing of a stomata.  Some epidermal cells have hair-like projections called trichomes, which prevent insect and animal predation. Root hairs are fragile extensions of root epidermal cells.  Plant Tissues Vascular Tissues Xylem is the water-carrying vascular tissue  Plant Tissues Vascular Tissues Phloem is the main food-carrying tissue in vascular plants.  Plant Tissues Plant tissues that are not meristematic, dermal, or vascular tissues are ground tissues. Consist of parenchyma, collenchyma, and sclerenchyma cells Functions include photosynthesis, storage, and support https://edpuzzle.com/media/679687852d22d2ddf5e6 4fee https://create.kahoot.it/my- library/kahoots/53d337c5-c687-4c22-8ef2- 20416f6c121c Roots  Roots Types of Roots Taproot system Anchors plant, food storage (beets, carrots) Fibrous root systems Anchors plant, good for rapid water storage Other root types are adapted to diverse environments. Pneumatophores are adapted to supply oxygen to roots submerged in water. Adventitious roots form unusual support structures.  Stems Types and Functions of Stems Tuber: food storage Rhizome: food storage, asexual reproduction Runner: asexual reproduction Bulb: food storage Corm: food storage  Leaves Types of Leaves People can use differences in the size, shape, color, and texture of leaves to help them identify types of plants. Some leaves are simple—the leaf blade is not divided into smaller parts. Compound leaves have leaf blades that are divided into two or more smaller parts called leaflets.  Plant Responses A plant response that causes movement that is not dependent on the direction of a stimulus is a nastic response. Nastic responses: Are not growth responses Are reversible Can be repeated  Plant Responses A tropism is a plant’s growth response to an external stimulus. If growth is toward the stimulus, it is a positive tropism. If growth is away from the stimulus, it is a negative tropism.  Plant Responses Phototropism Stimulus: light Growth toward light source Gravitropism Stimulus: gravity Positive downward and negative upward growth Thigmatropism Stimulus: mechanical Growth toward point of contact  Quiz 1. Which plant structure is NOT part of a root? A endodermis C pericycle B root cap D stomata CORRECT  Quiz 2. Which control(s) the movement of water vapor through the stomata? A bark C guard cells CORRECT B pericycle D vascular tissues  Quiz 3. Which is the vascular tissue that transports water and dissolved minerals from roots to leaves? A epidermis B parenchyma C xylem CORRECT D phloem  Quiz 4. Which fill(s) the space between spongy mesophyll cells? A gases CORRECT B chlorophyll C cells D vascular tissue  Quiz 5. Which describes a positive phototropism? A The plant grows away C The plant grows from the light. toward gravity. B The plant grows toward D The plant grows away the light. CORRECT from gravity. https://quizizz.com/admin/quiz/65a4c89660a1ca1fad404a24