Question

(11) a. How are spores of a moss plant disseminated? b. What is the chromosome complement (i.e. ploidy) of the nucleus of a spore? Explain. c. Which plant body of the moss alternation of generations life cycle produces the capsule? (12) a. Which stages of the alternation of generations life cycle of plants contain multicellular plant bodies? b. Which of the multicellular plant bodies is long-lived in the Flowering Plant life cycle. c. Are cells of a flowering plant seed haploid, diploid, polyploidy or some combination? Explain. (13) Using at least 3 similarities compare the alternation of generations life cycle of moss and flowering plants

Answer 1

11 a) moss are more advanced than other group of bryophta such as liverworts and hornworts.

sporophyte of mosses contain capsule at the top , as the capsule mature it get dry and a small opening occur at the top for the efficient dispersal of spores to the surrounding environment.

b) spores are formed as a result of meiosis in the sporocyte inside the capsule of the sporophyte ( reductional division ) and the spores are haploid in nature .

c) sporophyte which is diploid in nature produces a capsule which contain haploid spores.

12 a) sporophyte consist of multicellular plant bodies such as flower ( reproductive organ ).

b) seeds are the most long lived multicellular plant body.

c) diploid , seeds are formed by fusion two haploid gametes ( fertilisation ).

13)

dissimilarities	mosses	flowering plant
	dominant phase is gametophyte	dominant phase is sporophyte
	germination through spores	germination through seed
	sporophyte contain capsule	spopropyte contain flower

similarities	mosses	flowering plants
	sporophyte is diploid	sporophyte is diploid