Question

draw a cladogram containing the four groups of land plants?

Answer 1

1.Mosses

• Also called Bryophytes
• They do not have vascular system,no seeds and no flowers.
• They reproduce by spore formation called as Seta.This is sporophyte generation.
• examples: Liverwort,hornworts

2.Ferns/Pteridophytes

• They have vascular system (xylem and phloem),but no flowers.
• The reproduce by spores that become gametophytes.
• Gametophytes produce gametes (egg and sperm) which unite to produce plant.
• examples:horsetails and ferns.

3.Conifers/Gymnosperms

• Also called cone bearers since seeds are in cone.
• No spores produced.
• Pollen cones develop into microsporangia,that form pollen grains.
• examples:Redwood plant,Ginkgoes.

4. Flowering Plants/Angiosperms

• This is most abundant in nature
• The seeds are present in ovary of flowers.
• fruits produced cause seed dispersal by animal,thus here animals assist in pollination.
• examples:Grasses,wild flowers,cultivated flowers.