lesson 3

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Created by
Vincent

Cards (12)

  • Fun Facts about Animal
    Reproduction
    1. Elephants Are Pregnant For Nearly 2
    Years
    2. Dogs Can Experience False
    Pregnancies
    3. Spiders Can Choose Which Sperm
    To Use
    4. Octopus Mothers Die After After
    Their Eggs Hatch
    5. Kangaroos Have 3 Vaginas
    6. A Chipmunk's Pregnancy Might Be
    Shorter Than Your Menstrual Cycle
    7. Male Seahorses Give Birth
    8. Male Dolphins Are Not As Nice
    As You Think
  • Terms to know:
    Reproduction: process by which organisms
    produce off springs; thereby allowing the
    propagation and continuation of species
    2 TYPES: Sexual and Asexual Reproduction
  • Asexual Reproduction
    Individual produces
    offspring that are genetically
    identical to itself since the
    genetic makeup is not
    changed.
  • Asexual reproduction
    1. Binary fission
    • divides into 2
    2. Budding
    • Grow from the body
    3. Gemmation
    • develop a bulge that turns into new organism
    4. Fragmentation
    • one part of organism give rise to another
    5. Regeneration
    • Part of body regenerates
  • Sexual Reproduction
     Two organisms produce
    offspring that have genetic
    characteristics coming from
    both parents.
    Sexual reproduction
    requires fusion of cells in
    the pollen grain with female
    cells in male the ovule.
  • Sexual Reproduction - The
    Human Life Cycle
    During
    fertilization,
    sperm and ovum
    fuse forming a
    diploid zygote
    The zygote
    develops into an
    adult organism
  • Sexual Reproduction
    involves specialized sex cells called
    gametes
    the union of a male and female gamete
    results in the formation of a zygote
    that develops into a new individual
  • EXTERNAL FERTILIZATION
    • Release of both sperm and egg into an external environment
    • does not require placenta
    • potential high rate of reproduction
    • happens near bodies of water
  • INTERNAL FERTILIZATION
    The sperm fertilizes the egg within the
    female
    it protects the egg or embryo from
    harsh environments and predators
    1. Oviparity
    2. Ovoviviparity
    3. Vivi parity
  • Oviparity
    Oviparous
    animals retain
    the fertilized
    egg inside the
    body where
    development
    occurs and
    nourishment is
    received from
    the yolk.
  • Ovoviviparity
    Ovoviviparous
    animals
    produce eggs
    that develop
    within the
    mother’s body.
  • Viviparity
    A young develop
    within the
    female and
    nourishment is
    received directly
    from the mother
    through a
    placenta.