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17 Cards in this Set
- Front
- Back
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Compare and contrast sepals and petals.
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Petals are the colorful, sometimes fragrant organs of the flower that attract pollinators and provide a surface for the pollinators to rest on while eating. Sepals sometimes resemble petals. They serve as a protective covering for the flowering bud.
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Describe the male and female reproductive organs of a flower.
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male- the stamen, which consists of the anther and filament; female- the pistil, which consists of a stigma, style, and ovary
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Explain why walnut flowers are considered incomplete flowers.
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Walnut flowers are incomplete because they do not have both pistils and stamens.
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Discuss how photoperiodism influences flowering.
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Flowering is controlled by photoperiodism. If the flowers don't have the right seasonal conditions, they won't grow.
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Infer why a gardener's holly plant flowers every spring but never produces holly berries.
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The plant has female flowers and there is no plant nearby with male flowers, or it has male flowers
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In the middle of the summer a florist receives a large shipment of short-day plants. Infer what the florist must do to induce flowering.
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The florist should cover the greenhouse with tarps each afternoon to shorten the day and lengthen the night.
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Explain why the structure of a wind-pollinated flower is often different from that of an insect pollinated flower.
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Wind-pollinated flowers are small and lack petals. Insect-pollinated flowers have brightly colored petals and nectar.
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leaflike flower organs, usually brightly colored structures at the top of a flower stem.
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petal
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leaflike, usually green structures encircle the top of a flower stem below the petals.
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sepals
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male reproductive organ of a flower consisting of an anther and a filament.
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stamen
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pollen-producing structure located at the tip of a flower's stamen.
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anther
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female reproductive organ of a flower.
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pistil
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in plants, the bottom portion of a flowers's pistil that contains one or more ovules each containing one egg.
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ovary
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flowering plant response to differences in the length of day and night.
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photoperiodism
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a plant that is induced to flower when the number of daylight hours is shorter than its critical period.
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short-day plant
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plants that are induced to flower when the number of daylight hours is longer than its critical period.
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long-day plant
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plants that flower over a range in the number of daylight hours.
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day-neutral plant
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