BIOA01H3 Lecture Notes - Lecture 2: Monocotyledon, Pollen Tube, Desiccation

• School: UTSC
• Department: Biological Sciences
• Course: BIOA01H3
• Professor: Steve Joordens

Document Summary

Life cycle is identical to that of plants. Much better equipped to live in dry ecosystems: cuticles, stomata. Effectively transport water from roots to top of plant. Effectively transport minerals from top of plant further down. Leaves are dissected / clear fossil records of leaves. True ferns (12000: most representative of ferns today, ferns can grow up to the size of trees. In the past used to grow up to the size of today"s trees. Made up of lego" pieces that build on top of one another. 75% of species in tropics: canada does not have many fern species. Smallest ferns range from small azolla to 25m tall tree ferns. The fronds develop sori on the lower side of the leaves: sorus (singular of sori) contain clusters of spores, the sorus is the organ where it produces spores. One sorus is composed of hollow head shaped structures called sporangia.