20.3 Diversity of Flowering Plants TEKS 7B, 7D, 8B The student is expected to: 7B analyze and...
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Transcript of 20.3 Diversity of Flowering Plants TEKS 7B, 7D, 8B The student is expected to: 7B analyze and...
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20.3 Diversity of Flowering Plants TEKS 7B, 7D, 8B
The student is expected to:
7B analyze and evaluate scientific explanations concerning any data of sudden appearance,stasis, and sequential nature of groups in the fossil record;7D analyze and evaluate how the elements of natural selection, including inherited variation, the potential of a population to produce more offspring than can survive, and a finite supply ofenvironmental resources, result in differential reproductive success;
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20.3 Diversity of Flowering Plants TEKS 7B, 7D, 8B
Continued:
8B categorize organisms using a hierarchical classification system based on similarities and differences shared among groups
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20.3 Diversity of Flowering Plants TEKS 7B, 7D, 8B
KEY CONCEPT The largest phylum in the plant kingdom is the flowering plants.
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20.3 Diversity of Flowering Plants TEKS 7B, 7D, 8B
Flowering plants have unique adaptations that allow them to dominate in today’s world. • Flowers allow for efficient pollination.
– animals feed on pollen or nectar – pollen is spread from plant to plant in process
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20.3 Diversity of Flowering Plants TEKS 7B, 7D, 8B
• Fruit allows for efficient seed dispersal. – Fruit is flower’s ripened ovary– Surrounds and protects seed(s) – Many forms, each function in seed dispersal
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20.3 Diversity of Flowering Plants TEKS 7B, 7D, 8B
Botanists classify flowering plants into two groups based on seed type. • A cotyledon is an embryonic “seed leaf.” • Monocots have a single seed leaf.
– leaf veins usually parallel– flower parts usually in multiples of 3 – bundles of vascular tissue scattered in stem
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20.3 Diversity of Flowering Plants TEKS 7B, 7D, 8B
• Dicots have two seed leaves.
– leaf veins usually netlike – flower parts usually in multiples of 4 or 5 – bundles of vascular tissue in rings in stem
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20.3 Diversity of Flowering Plants TEKS 7B, 7D, 8B
Flowering plants are also categorized by stem type and lifespan.• Stem type can be woody or herbaceous.
– Wood is a fibrousmaterial made up ofdead cells.
– Wood has highconcentrations oflignin and cellulose.
– Woody stemsare stiff.
Oak
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20.3 Diversity of Flowering Plants TEKS 7B, 7D, 8B
Flowering plants are also categorized by stem type and lifespan.• Stem type can be woody or herbaceous.
– Wood is a fibrousmaterial made up ofdead cells.
– Wood has highconcentrations oflignin and cellulose.
– Woody stemsare stiff.
– Herbaceous plants do not produce wood.
Iris
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20.3 Diversity of Flowering Plants TEKS 7B, 7D, 8B
• There are three types of plant life spans. – Annuals mature from seed,
flower, and die in one year.
Wheat
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20.3 Diversity of Flowering Plants TEKS 7B, 7D, 8B
– Biennials take two years to compete life cycle.
• There are three types of plant life spans. – Annuals mature from seed,
flower, and die in one year.
Foxglove
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20.3 Diversity of Flowering Plants TEKS 7B, 7D, 8B
– Annuals mature from seed, flower, and die in one year.• There are three types of plant life spans.
– Perennials live more than two years.
Big bluestem
– Biennials take two years to compete life cycle.