21.1 plant cells and tissues reproductive adaptations contribute to angiosperm success anatomy of a...
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21.1 Plant Cells and Tissues Reproductive Adaptations Contribute to Angiosperm SuccessReproductive Adaptations Contribute to Angiosperm Success
Anatomy of a Typical Flower Anatomy of a Typical Flower
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21.1 Plant Cells and Tissues
Adaptations:
• Sepals• Petals• Stamen• Carpal/Pistil
20.120.1 Reproductive Adaptations Contribute to Angiosperm SuccessReproductive Adaptations Contribute to Angiosperm Success
21.1 Plant Cells and Tissues
Adaptations
• Double Fertilization– Embryo– Endosperm
• Seeds– Seed coat– Embryo– Cotyledon
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Embryo Embryo
21.1 Plant Cells and Tissues
Asexual Reproduction In Angiosperms
• Vegetative Reproduction: dropped stems or shoots that establish new roots and become clones.
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21.1 Plant Cells and Tissues
KEY CONCEPT Plants have specialized cells and tissue systems.
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21.1 Plant Cells and Tissues
A Plant’s Roots and Shoots System
• Root system– Fibrous Root
vs Tap Root• Shoot system
– Stems
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21.1 Plant Cells and Tissues
– provides support – stores materials in roots and
stems – Photosynthesis (in the shoot)
• Ground tissue is found inside a plant.
Plant organs are made of three tissue systems.
• Dermal tissue covers the outside of a plant. – protects the plant – secretes cuticle of leaves – forms outer bark of trees
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stem
leaf
root
Tissue Types #1 & #2Tissue Types #1 & #2
21.1 Plant Cells and Tissues
– xylem transports water and minerals
– phloem transports photosynthetic products (sugar)
• Vascular tissue: hollow tube shaped, used for transport
20.220.2 Tissue Type #3Tissue Type #3
21.1 Plant Cells and Tissues
Plant tissues are made of three basic cell types.
• Parenchyma cells are the most common plant cell type. – store starch, oils and
water– Photosynthesis and Cellular
Respiration– help heal wounds to
the plant – have thin flexible walls &
large central vacuole
20.220.2 Cell Type #1Cell Type #1
21.1 Plant Cells and Tissues
– they are strong and flexible.– celery strings are strands of collenchyma.– they have unevenly thick cell walls.
• Collenchyma cells provide support to a growing plant.
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21.1 Plant Cells and Tissues
– second cell wall hardened by lignin– die when they reach maturity – used by humans to make linen and rope
• Sclerenchyma cells are the strongest plant cell type.
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