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Plants: 4MAT Unit Prezi
Transcript of Plants: 4MAT Unit Prezi
Root Tip - area of meristemic tissue and growth.
Root cap - protects the root tip. Stem structure: Xylem:
Phloem: A one way passage that primarily transports water from the roots; minerals are also transported in the xylem. A two way passage that primarily transports nutrients/food; water is also transported in the phloem. Leaf Structure: Photosynthesis: Types of vascular Plants Seed Seedless Gymnosperms Conifers, cycads, gnetophytes, and gingko "Naked" Seeds that are not protected with fruit, but are contained in an open cone structure.
Most will retain their leaves year around. Angiosperms Monocots: Dicots: one cotyledon (nutrient storage - seed leaf)
Scattered vascular bundles
parallel leaf veins
flower parts in multiples of three "Flowering" plants - seeds are enclosed in a protective structure, like a mature ovary - fruit.
Flowers can contain the male and female reproductive structures of the plant. Two categories: Monocots and Dicots two cotyledons
vascular bundles in a ring
Net-like leaf veins
Flower parts in multiples of 4 or 5 Do not create seeds and will reproduce with wind blown spores.
Require water for reproduction because of flagellated sperm. Seedless vascular plants include Ferns, whisk ferns, club mosses, horsetails Roots, stems, and leaves Conifers:
(Conferophyta) Examples - Douglas Fir, Spruce,
Juniper, and Pine Gingko:
(Gingkophyta) These plants have fan shaped leaves, fleshy seeds, only one
living species. Gnetophytes Examples: Ephedra and
(Cycadophyta) Cone-bearing plant with
palm-like leaves male female Fern with Sori Sorus (plural=Sori):
A cluster of sporangia, which
contain spores. Horsetail Cuticle: waxy, water-repellant layer that protects the leaf. Epidermis: outer layer of cells on the leaf (upper and lower) that secretes the cuticle. Palisade Mesophyll: elongates, pickle shaped cells, under the epidermis. These contain lots of chlorophyll. Spongy Mesophyll: below the palisade mesophyll with round/ irregular cells. This layer has air spaces for gas exchange. Stoma: an opening in the leaves that allows water and gas to leave and enter the plant. (More of these are locate on the bottom of the leaf) Guard Cells: Surrounds the stoma to open and close the opening. Vein: vascular bundle of the leaf Leaf Types All of these contain Dermal, vascular, and ground tissues.