LESSON ONE 
SORTING OF ANIMALS 
1. Locomotion—Every living animal eats, breathes, 
moves, feels, and reproduces its kind. The bodies of farm 
animals are complexively formed and because of this are 
able to do various kinds of work. In a modified way plants 
also eat, breathe, feel and reproduce, but they are unable 
to move about. Locomotion is denied them. Their roots 
hold them fast and what growth an individual makes comes 
from the immediate vicinity in which the roots are attached 
for food and sustenance. Animals, on the other hand, can 
and do move from place to place. This advantage is of 
much consequence in the development of the individual and 
species. 
2. Amoeba.—Water is the principal home of the simplest 
animals. It is an ideal place, as it is easier to swim than to 
walk. Locomotion starts here. You may not think much 
about the tiny animals of the streams, ponds and seas which 
cannot be seen with the eye, but they exist nevertheless. 
Some of these prefer fresh water; some like best the brine 
of the ocean; others seek the moist sand of the quiet places, 
and still others attach themselves to the bodies of certain 
animals and from them suck their food. 
These simplest animals are of one cell only. The ameeba, for in- 
stance, eats and yet has no stomach; it moves and has no legs; it 
feels and has no nerves. 
Indeed, in respect to life as 
an animal, it does every- 
thing that a horse does. In 
performing its life func- 
tions it can take on any 
shape. It is a cell but with- 
out fixed outline. If it is 
How an Amoepa Eats hungry it moves up to an- 
