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35 Cards in this Set
- Front
- Back
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What is the purpose in a flower?
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to attract insects and birds to aid in pollination by pollen dispersal and fertilization
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Which group of plants has the most species on earth?
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angiosperms
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What does angiosperm mean?
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flowering plants
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Why are angiosperms important to humans?
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for a role in beauty and pleasure of human life is immeasurable
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What is triple fusion?
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there are three nuclei uniting in the process of endosperm formation
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What is double fertilization?
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fusion of the gametes takes place in the embryo sac (megagametophyte) where only one of hte two sperm nuclei is involved in the act of fertilization- the other sperm unites with the two to form endosperm
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Name 3 differences between eudicots and monocots.
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eudicots-net-veined leaves
2. true secondary growth w/ vascular cambium 3. two cotyledons or seed leaves in the embryo 4. flower parts in 4's or 5's 5. vascular bundles in a ring monocots- 1. parallel-veined leaves 2. stems w/out vascular cambium c. one cotyledon or seed leaf in embryo d. flower parts usually arranged in 3's or multiples of 3's e. fibrous root system g. complex vascular bundle arrangement |
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What is a peduncle?
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the stalk of a solitary flower or the main stalk of an inflorescence
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What is a pedicel?
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the stalk of an individual flower in an inflorescence
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What is a receptacle?
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the enlarged end of the flower stalk to which the sepals, petals, stamens and carpels are attached
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What is a perianth?
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the sepals and petals together
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What is the anther and filament collectively called?
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androecium
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What is one or more ovules enclosed in a carpel called?
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gynoecium
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What is a flower in which all four parts-sepal, petal, stamen and carpel are present?
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complete flower
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What is a flower in which one or more of the four floral parts is lacking?
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incomplete flower
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What is a single flower that has both stamens and carpels?
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perfect flower
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What is a flower in which either stamens or carpels are lacking? unisexual
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imperfect flower
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What is a unisexual flower possessing only an androecium is referred to as a ?
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staminate flower
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What is a flower possessing only a gyonecium is referred to as a ?
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carpellate or pistillate flower
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What is having only perfect flowers on the plant called?
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synoecious
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What is having both carpellate and staminate flowers on the same plant called?
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monoecious
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What is having carpellate flowers on one plant and staminate flowers on another of the same species called?
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dioecious
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What is the sepal collectively called?
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the calyx
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What is the petal collectively called?
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the corolla
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What is the floral organization in which the calyx, petals and stamens are attached to the receptacle at the base of the ovary?
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hypogyny
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Is the ovary superior or inferior in the floral organization hypogyny?
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superior
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What is the floral organziation in which the petals and stamens are atached to the margin of a cupshaped extension of the receptacle (the hypanthium)?
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perigyny
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Is the ovary superior or inferior int he floral organization perigyny?
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superior
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What is the floral organnnization in which the sepals, petals and stamens apparently grow from the top of the ovary?
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epigyny
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Is the ovary superior or inferior in the floral organization epigny?
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inferior
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What is a composite flower? give an example
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a head is a compact inflorescence consisting of sessile flowers closely attached to the top of an expanded stem, the receptacle
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What type of flowers are on a composite flower?
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ray flowers and disk flowers (carpel-like)
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What is the stalk of an ovule called in angiosperms?
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funiculus
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What is the small opening at the end of the integuments called?
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a micropyle
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What is this?
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style with a pollen tube
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