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Classification of Plants
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A plant can be divided into 3 parts
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Types of Stems Tree – Shrub one main woody stem
Usually over 3 meters tall Shrub Multiple woody stems Normally under 3 meters tall
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Types of Stems Vine Herbaceous No supporting stem Woody or non-woody
Grasses, bamboo
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Types of Roots Fibrous no root grows larger than another
can have up to 14 million roots (i.e. rye grass) Help prevent erosion Examples: grasses, marigolds,
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Types of Roots Taproots Primary root grows larger than secondary roots
Makes it harder to pull them from the ground Examples include carrots, dandelions, beets and radishes
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Types of Roots Rhizomes Stolons
usually underground, horizontal stem of a plant that often sends out roots and shoots from its nodes. may also be referred to as creeping rootstalks, or rootstocks Stolons similar to a rhizome, but exists above ground, sprouting from an existing stem. Top pic is a ginger rhizome, bottom pic shows red stolons
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Types of Roots Tuber Corm
thickened part of a stolon that has been enlarged for use as a storage organ. Corm short, vertical, swollen underground stem of a plant that serves as a storage organ to enable the plant to survive winter or other adverse conditions such as summer drought and heat Top pic is a potato (tuber), bottom pic is a corm called Taro (from Tahitian or other Polynesian languages), more rarely kalo (from Hawaiian), is a tropical plant grown primarily as a vegetable food for its edible corm, and secondarily as a leaf vegetable
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Leaves The leaf is a plant organ specialized for photosynthesis
Starts at the axillary bud
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Leaf Form Simple Compound One blade per leaf
Multiple blades or leaflets per leaf
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Leaf Arrangement
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Compound Leaflet Arrangement
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Compound Leaflet Arrangement
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Plant Kingdom Non-flowering Plants Flowering Plants
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Non - flowering Plants Do NOT produce flowers
. 3 groups Non - flowering Plants Mosses Ferns Gymnosperms Do NOT produce flowers
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Examples of Mosses
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Spore-producing capsule
Moss spores
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Characteristics of Mosses
.Simplest plants .No true roots, No vascular tissues (no transport) .Simple stems & leaves .Have rhizoids for anchorage .Spores from capsules (wind-dispersal) .Damp terrestrial land
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Fern
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A leaf (finely divided into small parts)
Fern A leaf (finely divided into small parts) underground stem root
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spore-producing organs (circinate) young leaf
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Characteristics of Ferns
.roots, feathery leaves & underground stems .have vascular tissues (transport & support) .Spore-producing organ on the underside of leaves (reproduction) .Damp & shady places
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Gymnosperms Pine tree
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needle-shaped leaves
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Male cones (in clusters) Female cones (scattered)
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Characteristics of Gymnosperms
.tall evergreen trees .roots, woody stems .needle-shaped leaves .vascular tissues (transport) .cones with reproductive structures .naked seeds in female cones .dry places
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Question and Answer Pairs
Take one minute to develop a question over the material you just learned. Then, see if you can stump your partner!
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Flowering Plants . 2 groups Monocotyledons Dicotyledons
. roots, stems, leaves . vascular tissues (transport) . flowers, fruits (contain seeds)
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Monocotyledons Parallel veins
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Characteristics of Monocotyledons
. one seed-leaf leaves have parallel veins . herbaceous plants . e.g. grass, maize
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Dicotyledons Veins in network
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Characteristics of Dicotyledons
. two seed-leaves . leaves have veins in network . e.g. trees, sunflower, rose
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Drill Partners With your neighbor, drill each other on the differences between monocots and dicots until you are both certain you can remember them.
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Plant Classification Plants Non-flowering Flowering 1 seed-leaf
2 seed-leaves Spore-bearing Naked seeds Monocots Dicots Gymnosperms No roots with roots Mosses Ferns
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Ticket Out the door List three important facts you learned today.
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