40 GENERAL BIOLOGY. 



1. Formation of hyphae. 



(a) Cell-wall. 



(b) Protoplasm. 



(c) Vacuoles. 



(d) Fat-drops. 



Mount in water a portion of mycelium from bread. 

 Observe : 



2. Hyphse. 



(a) Division into cells. 



(b) Mode of branching. From what part of 



a cell does a branch arise ? 



(c) Vacuoles. 

 Sketch. 



III. Keproduction. 



Aerial hyphse and conidiophores. 

 Tease out in ivater some of the mycelium from a 

 specimen that has become only slightly green. 

 Observe : 

 1. Erect hyphse, each consisting of : 



(a) Primary erect hypha. 



(b) Branches. (Terminal branches : basidia 



or sterigmata.) 



(c) Constrictions of the terminal branches : 



spores (conidia). At which end of the 

 chain are the conidia larger? At 

 which end are they first formed ? 

 Sketch. 



