QUESTIONS. 
BRANCH I.—1. What is a cell? 2. Mention some differences be- 
tween animals and plants. 3. What are the characteristics of the sim- 
plest animals? 4. Describe a moner; its method of eating. 5. What 
isa nucleus? 6, Define a contracting vesicle. 7. Define an amceba. 
8. Describe a shelled amceba. g. What isa radiolarian? ro, What 
great work do these forms accomplish? 11. Define a gregarine. 12. 
In what are they remarkable? 13. Define the infusorians. 14. How 
do they differ from the preceding forms? 15. What isa cilium? 16. 
Define a monad. 17. What is a compound monad? 18. How does 
the acineta differ from the monad? 19. What are the characteristics 
of the suctorians? 20. Describe the bell animalcules. 21. What is 
meant by budding? 
Brancu II.—1. Describe the structure of a sponge. 2. What are 
spicules? 3. How does a sponge eat? 4. Describe the different uses 
of the large and small pores. §. Explain the development of the 
sponge. 6. Define a lime-sponge. 7. Give examples of other kinds. 
8. How do they benefit man ? . 
BRANCH III.—1. What are the general characteristics of ccelente- 
rates? 2. Define a hydra; show the use of its arms. 3. What is a 
lasso-cell? 4. Describe a lime-secreting hydroid. 5. What is meant 
by alternate generations? 6. Give an example. 7. How do the dis- 
cophores differ from hydroid medusze? 8. Where are the eyes in a jelly- 
fish? 9. Describe the development of an aurelia. 10, Explain the use 
of the water vascular system. 11. Describe the physalia. 12. How does 
it secure prey? 13. Define a sea-anemone. 14. What isa septa? 15. 
Describe the development of sea-anemones. 16, How do corals differ 
from anemones? 17. About how fast does coral grow? 18. Are corals 
found out of the tropics? Give example. 19. What is a coral reef, and 
how formed? 20, What is an atoll? 21. Of what value is coral to 
man? Anemones? 22. What is a gorgonia? 23. Describe a sea-fan. 
24. What are the general characteristics of the comb-bearers? 
