What are Bryophytes?. Liverworts. Mosses. Hornworts. Most abundantly found in areas with water – Swamps and near streams and in rain forests. Also well adapted to harsh environments and can tolerate low temperatures. Most abundant plants in polar regions.
What are Bryophytes? Liverworts Mosses Hornworts
Most abundantly found in areas with water – Swamps and near streams and in rain forests. Also well adapted to harsh environments and can tolerate low temperatures. Most abundant plants in polar regions.
Mosses have rhizoids that anchor them to the ground and absorb water and minerals from the surrounding soil. They do not have true roots, stems or leaves.
Capsule Sporophyte Stalk Stem-like structures Gametophyte Leaf like structures Rhizoids
Bryophytes depend on water for reproduction – sperm must swim to egg cell.
Alternation of generations: A life cycle which alternates between diploid and haploid phases. Diploid??? Plant body (cells) have 2 copies of each chromosome , also called 2n. Haploid??? The plant body or cells have only one copy of each chromosome or half the number of chromosomes, also called n.
Diploid – total # … 2n Number in somatic cells Haploid– ½ the # …n Number in gametes + Haploid n Haploid n fertilization
Human Use of Moss: Compacted remains of sphagnum form thick deposits of peat.
Used in gardening – improves soil’s ability to retain water, lowering pH of soil. Will add to the soil’s acidity. Used as a form of fuel in Ireland.
Water is needed Zygote is formed Antheridium Sporangium Archegogium Sporophyte Gametophyte Spores Protonema (young gametophyte)