plant reproduction: seed plants. table of contents dateassignmentvocabularypage 11/28/12seed...
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Plant Reproduction: Seed Plants
Table of ContentsDate Assignment Vocabulary Page
11/28/12 Seed Plants 10
Review- What are the two main types of plants?
• Non- Vascular – Lacking vascular
tissue– Live in moist areas – Examples- mosses,
liverworts, hornworts
• Vascular–Have vascular
tissue to move water and nutrients through– Two types:
seedless and seed plants
How is it all related?
Have spores
Have seeds
Brain Pop- Seed Plants
• As you watch the video, listen for the characteristics of each type of seed plant.
Set up your page like this…Gymnosperms Angiosperms
Seed Plants• Seed plants reproduce sexually – Fertilization from male and female sex cells
• Two types:– Gymnosperms• E.g. Pine trees with cones
– Angiosperms• E.g. Most have flowers
Gymnosperms• Means ‘naked seed’ = needs the cone to protect it!• Cones are the reproductive structures on
gymnosperms and each species has a different type of cone
• Male and female cones are produced on the same plant: – Female cones have ovules, which
contain the egg cells– Male cones develop pollen
grains, which contain sperm cells
Gymnosperms continued…
• Male cones release a cloud of pollen
• Wind usually carries the pollen to the female cone
• The pollen is trapped by a sticky substance and develops into a pollen tube – Grows towards the ovule
and sperm can fertilize the egg cell
– Can take 15 months!
Gymnosperms…there’s more!• After fertilization, an embryo forms and
develops into a seed• When female pine cones mature, they open
and release their seeds – These can be carried away, or are eaten or buried
by animals• Buried seeds may grow into new pine trees!
Angiosperms
• All produce flowers• Can be brightly colored or have a nice
smell to attract animals– Animals like birds (hummingbirds) or
insects (bees) can help spread pollen to other flowers
• When pollen from the stamen lands on the stigma, this is called pollination– The same process occurs in
gymnosperms, where a pollen tube grows into the ovule and eventually a seed will develop)
Angiosperm or Gymnosperm?
• 1. • 2.
• 3.
Angiosperm or Gymnosperm?
• 1.
2.• 3.