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Rants about PLANTS. Parts of a Plant. Flower: seed bearing structure Leaves: photosynthetic organ that contains vascular tissue Stem: supporting structure that carries water and nutrients between the roots and leaves Roots: underground organ that absorbs water.

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parts of a plant
Parts of a Plant
  • Flower: seed bearing structure
  • Leaves: photosynthetic organ that contains vascular tissue
  • Stem: supporting structure that carries water and nutrients between the roots and leaves
  • Roots: underground organ that absorbs water
reproductive parts of a plant
Reproductive Parts of a Plant
  • Petals: brightly colored structure that attracts insects and other pollinators
  • Stigma: sticky portion at the top of the pistol that traps pollen
  • Pistol: narrow stalk that the pollen travels through
  • Ovary: contains egg cells, where fertilization takes place. (seed)
reproductive parts of a plant1
Reproductive Parts of a Plant
  • Anther: makes pollen (sperm)
  • Stamen: provides support of anther
  • Sepals: encloses a bud before it opens and protects the flower while it is developing
stomata and guard cells
Stomata and Guard Cells
  • Guard Cell: specialized cell that controls the opening and closing of stomata by responding to changes in water pressure
  • Stoma:small pores on the underside of a leaf that regulates gas exchange:
    • Absorbs CO₂ in photosynthesis
    • Releases O₂ and H₂O in transpiration

6CO2 + 6H2O + Energy ------> C6H12O6 + 6O2

xylem and phloem
Xylem and Phloem
  • Xylem: transport of water from roots to remainder of plant
  • Phloem:transport of food and nutrients from leaves to remainder of plant
geotropism or gravitropism
Geotropism or Gravitropism
  • The growth of plants in response to gravity
    • Roots grow downward, stem grows upward
phototropism
Phototropism
  • The movement of a plant towards or away from light
hydrotropism
Hydrotropism
  • The movement of a plant towards or away from water
thigmotropism
Thigmotropism
  • directional response of a plant organ to touch or physical contact with a solid object

*Example: Vines growing on a trellis

other need to know vocab
Other Need to Know Vocab 
  • Pollination: transfer of pollen from the male reproductive structure to the female reproductive structure
  • Growth: period of time when the plant embryo is growing
  • Dormancy: period of time when the plant embryo is alive, but not growing
angiosperm vs gymnosperm
Angiosperm vs. Gymnosperm
  • GYMNOSPERM
  • cone bearing plants (seeds grow on cones) "naked seeds“
  • wind pollinated
  • needle like leaves
  • Examples: pine trees & evergreens

ANGIOSPERM

  • flowering plants
  • seeds are enclosed in a fruit
  • most are pollinated by birds & bees
  • Examples: grasses, tulips, oaks, dandelions
  • Divided into two main groups: Monocots & Dicots
two types of angiosperms
Two Types of Angiosperms

MONOCOT

DICOT

Angiosperms that have 2 seed leaves (cotyledons)

Net-like veins on leaves

Flowers have 4-5 parts

Taproots

Examples: trees and ornamental flowers

  • Angiosperms that have 1 seed leaf (cotyledon)
  • Parallel veins on leaves
  • 3 part symmetry for flowers
  • Fibrous roots
  • Example: lilies, onions, corn, grasses, wheat