Transcript Asexual/Sexual Reproduction

Asexual/Sexual
Reproduction
Bacteria
• Bacteria reproduce Asexually and Sexually.
• Asexual – Binary Fission
• Sexual – Conjugation
Protista
• Protists reproduce Asexually and Sexually.
• Asexual – Mitosis/Cell Division
• Sexual – Meiosis creates sex cells; two sex
cells join to form a new organism. This
depends on the specific type of protist.
Fungi
• Fungi reproduce Asexually and Sexually
• Spore – waterproof reproductive cell that can
grow into a new organism.
• Hyphae – a mass of many-celled, threadlike
tubes that make of the body of fungi.
• Fungi are not identified as “male” or “female”
Fungi Cont.
• Asexual – involve spores created by
mitosis/cell division; these spores grow to be a
new organism.
• Sexual – involves the hyphae of two
genetically different fungi of the same species;
the hyphae join and a reproductive structure
will grow. After meiosis occurs in these
structures, spores are produced that grow into
fungi.
Plants
• Plants reproduce Asexually and Sexually
• Plants were originally found in water and
made adaptations to survive on land.
• Plants evolved to create water-resistant
spores or seeds (found in cones or
flowers/fruits)
Seedless Plants
• These plants reproduce using spores.
– Ex: Ferns, Mosses, Liverworts and Hornworts
Seed Plants
• Gymnosperms – plants that produce seeds
that are not protected by fruit; they do not
have flowers (evergreens).
• There are 4 types of Gymnosperms – Conifers,
Cycads, Ginkgoes, and Gnetophytes.
– Conifers (pines, firs, spruce) produce two types of
cones – male and female.
• They are both found on the same plant.
• Cones are the reproductive structures of conifers.
• Seeds develop on the female cones.
Seed Plants Cont.
• Angiosperms – plant that flowers and
produces fruits with one or more seeds.
– Seeds are produced on the inside or outside of the
fruit.
Animals
• Animals reproduce sexually.
– Animals require both sex cells, sperm and egg, to
reproduce.
• Exception to the Rule
– Starfish
• Reproduce sexually (male and female starfish)
• Reproduce asexually through Regeneration (limbs, arms, spines, some
body parts) and some split themselves on purpose to create two new
organisms.