Ge ie o8 NS 
A MOSS PLANT. 27 
Why is the plant body erect ? 
Is each plant body simple or compound? Why? 
Has it stomates? Ifso, where and why ? 
Explain the advantage and stages of “alternation of 
generations.”” Are the sporophyte and gametophyte 
phases separate? Why? 
Are mosses of economic importance? If so, how ? 
What is their food ? 
Are they independents or dependents (parasites or 
saprophytes) ? 
How does the addition of water affect a quantity of 
moss after excessive drying ? 
. How do mosses endure excessive drought ? 
Ts 
12. 
Why are moss plants so successful in cold climates ? 
How are the spores distributed and what do they 
become in the life history of the plant? 
