STORAGE ROOMS 
7 * 
6. Seeds give us three of our most useful 
vegetables: peas, beans, and sweet corn. They 
supply starch and some fats. The peas and 
beans also have proteins, the substance needed 
for growing. They can take the place of meat 
because protein is the substance supplied to our 
bodies by meat. 
Leaves are the workshops of the plant. A 
peculiar green substance, chlorophyll, makes it 
possible for them to manufacture food. They 
absorb water from the roots and carbon dioxide 
from the air. Water is very necessary to the 
making of food. But, in addition, more water 
is needed by the leaves than is used in photo¬ 
synthesis. In order to work properly the cells 
of the leaf must be full of water. When a leaf 
wilts, it is because the cells are nearly dry. 
Water is also needed to carry the finished food 
from place to place in the plant. Therefore, 
the leaves are constantly calling for more water. 
They draw up more than they need. There are 
tiny openings in the under side of the leaves 
where the extra water may escape. The mois- 
Why do leaves 
drop in the 
autumn? 
Many seeds are 
good to eat 
