How to make a lot of flowers
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Transcript of How to make a lot of flowers
How to make a lot of flowers
Flower Reproduction
Some Basics
• Like animals, some plants reproduce sexually and others asexually
• Plants generally have two stages of life– Sporophyte: spores are made (spores are
fertilized eggs, or plant babies)– Gametophyte: sex cells, both male and female,
are made
There are 3 types of plants
• Non-vascular– No specialized tissue for
moving H20, nutrients
• Vascular, Seedless– Special tissue, but no seeds
(ex: Ferns)
• Vascular, Seed– Gymnosperms (no flowers)
– Angiosperms (flowers)
Non-Vasculars
• Mosses often live grouped together
• These are usually the first plants to grow in a new environment
• When they die, a layer of thin new soil forms– Then, new plants can
grow into the soil
Vascular, Seedless
• Ferns usually grow in right after the mosses have formed their layer of soil
• Like mosses, when they die, they also leave soil
• Vascular, seedless plant remains form coal
Seed Plants• Seed plants include gymnosperms and
angiosperms• Seeds surround and protect spores from the
sporophyte stage– Gametophytes grow within these, as opposed to
seedless plants where gametophytes grow on their own outside
• While the sperm of seedless plants need water to move through to reach an egg, seed plants do not– Sperm inside pollen is transported by wind or
animals
Vascular and Seed: Gymnosperms
• Do NOT have flowers• Seeds, containing male
sex cells, protected by cones
• There are male and female cones
• Fertilization is called pollination
Vascular and Seed: Angiosperms• Have flowers that help
them reproduce• Wind and animals
(like birds and bees) carry pollen from flower to flower– Cross-pollination
• Fruits, or burrs, can grow around seeds– When animals eat the
fruit, or carry the burrs they leave the fertilized seeds somewhere else
Can you explain how these reproduce?