Science Unit 5 Quiz 1

Topic 1

• Parts of a plant

  • Stem
  • Support
  • Food storage
  • Transportation (Water + nutrients)
    • Xylem - transports water from roots
    • Phloem - transports nutrients from roots + transports sugar from leaves
  • Roots
  • Absorb water + nutrients
  • Anchors
  • Food storage

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• Photosynthesis - To make food by using light

  • CO2 + H2O + energy —> C6H12O6 + O2
  • Green pigment needed for photosynthesis - chlorophyll

• Respiration - breaking down sugars to release energy

  • C6H12O6+O2 —> CO2 + H20 + ENERGY

• Transpiration

  • Loss of water vapor through a living organism
  • Stomata - Opening in leaf
  • Guard cell opens/closes stomata
  • Releases H2O

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Topic 2

• Plant reproduction

  • Sexual
  • Genetic material of 2 parents
  • Asexual
  • Single parent - offspring will be identical (clones)
  • Flowers
  • Contain plants reproductive organs
  • Can be male female or both
  • Stamen - Male reproductive organ
    • Anther - pollen(sperm)
    • Filament - stalk supporting anther
  • Pistil - female reproductive organ
    • Stigma - receives pollen
    • Style - tube connecting stigma and ovary
    • Ovary- contains the egg
  • Cross pollinate or self pollinate

• Cross fertilization

  • Pollinators: Insects, birds, animal fur, wind

• Asexual reproduction

• Does not require a mate

• Easier, faster, less energy

• Less variety in traits of offspring (less genetic diversity)

• Deteriorate likelihood of survival

• Sexual reproduction

• Greater variety (more genetic diversity = likelihood of survival goes up)

• Slower, more energy

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