Question

1 What is meant by alternation of generations? alternation of generations between haploid and diploid the grocess their life that life Cycle cycle in alternate 2 What type of nuclear division is involved in the development of a sporophyte plant? Of the spores? meiosis ; Mitosis REVIEW QUESTIONS 3 Arrange the following structures or processes into a diagram showing the life cycle of a moss plant. Antheridium Leafy bud Sperms Tetrad of spores Archegonium Mature female plant Sperm transfer Young sporophyte Capsule Mature male plant Spores Zygote Mature sporophyte Spore dispersal Embryo Meiosis Spore germination Fertilization Protonema Spore mother cells Egg Young sporophyte Meiosis Fertilization Sperm transfer EXERCISE 10 * Mosses, Liverworts, and Hornworts 111

arrange the following structures or prosses into a diagram showing the life cycle of a moss plant

Answer 1

Mature sporophyte Young sporophyte - Capsule sperie motor cells Embryo Zygote Meiosis Fertilization Tetred of spores pores spore dispersal Spore germination pretonema Sperm transfer Egg A chegonium sperms Antheridium mature male plant mature female ent

Dominant stage in moss plant is gametophyte. Gametophyte produces gametes. Gametes fuse to form zygote which develops in to embryo. Embryo becomes a sporophyte which is dependent on the gametophyte itself. Sporophyte produces spores ahich when diespersed germinate and develop in to gametophyte. This is alternation of gametophytic stage to sporophyte stage in the life cycle of the plants.