42 o How Animals and Plants Reproduce unit viii 



How does the fused cell or zygospore compare in size w'xih. the original 

 cells? How can you tell that the zygospore has a thick wall? You will find 

 no zygospores growing into new plants. Why not? Draw and label all 

 parts. 



7. How do paramecia conjugate? Examine prepared slides. 



8, Make a table, listing each kind of asexual reproduction, with ex- 

 amples, and brief descriptions. Do the same for sexual reproduction. 



Further Activities in Biology 



1. If you have a rich culture of Paramecium, prepare several stained 

 slides to show fission. A simple stain is Lugol's solution (potassium iodide 

 and iodine in water) . 



2. Make an exhibit of models showing reproduction in ameba. 



3. Devise an experiment to find out how the rate of budding in yeast is 

 afl^ected by the amount of sugar in the solution. 



4. Mushroom spore prints are made by standing the mushroom upright 

 over a sheet of white paper in a box (so that the spores will not be blown 

 about). Spray the sheet with "Fixatif," using an atomizer. 



5. Will lowering the temperature of the water cause Spirogyra to con- 

 jugate? Keep a jar of Spirogv^a in a basin of chilled water and examine 

 at intervals under the microscope. 



