Section Number Name EXERCISE 7 Bryophytes-Liverworts and Mosses Introduction 1.

Question

Section Number Name EXERCISE 7 Bryophytes-Liverworts and Mosses Introduction 1. Explain why water must be present for the brv(ph …?( ompl‘.t«, ,he .., ual Portion of then lif., ' v' 1. 2. Green algae are believed to be the ancestors of the bryophytes. Cite four distinct lines of evidence to support this belief 3. Complete this diagram of a "generic" alternation of generations. mature spore mother cells MEIOSIS haploid (n) sperm 4. Describe in your own words the difference between a sporophyte and a gametophyte.

Explanation / Answer

1. The sexual organs of bryophytes are antheridia (male) and archegonia (female). The antheridia produce flagellated sperms which need water to swim towards the antheridia and to fertilize the egg produced there. This is why water must be present for the bryophytes to complete the sexual portion of their life cycle.

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