ANGIOSPERMS AND GYMNOSPERMS

ANGIOSPERMS

• ovules are enclosed within a carpel
• Double fertilization
• With stamens with two pairs of pollen sacs
• phloem tissue composed of sieve tubes and companion cells
• Flowering plant are one of the major groups of extant seed plants

EXAMPLES OF ANGIOSPERM

• Roses
• Tomatoes
• Tulips
• Magnolia trees
• Cucumber

ANGIOSPERM REPRODUCTION

• Some reproduce asexually and sexually
• In plant, asexual reproduction is also known as vegetative reproduction
• Sexual reproduction generate genetic variation makes evolutionary adaptation possible
• Can reproduce by pollination
• May also reproduce by seeds

GYMNOSPERM

• Also known as "naked seed plant"
• double fertilization does not take place
• Female cones are bigger & higher up that male cones
• "gymnosperm" comes from the Greek word gymnospermos

EXAMPLES OF GYNOSPERM

• Redwood
• Conifer
• Fir
• Spruce
• Pine

REPRODUCTION OF A GYMNOSPERM

• ovaries are absent in gymnosperms
• double fertilization does not take place
• 1 of 2 sperm cells released by the generative cell fuses the egg
• Female cones are bigger & higher up that male cones