23. Q. How are vegetables and animals distinguished from each other?
A. By the term kingdom, and the types in each kingdom are called
sub-kingdoms.
24. Q. Under what five types or plans of structure can all the multitude
of plants which clothe the earth or dwell in the sea be arranged? A.
Protophytes, Thallogens, Acrogens, Endogens and Exogens.
25. Q. What are the elementary masses of bioplasm usually called? A. They
are usually called cells, even if they are merely pieces of animated
jelly, uninclosed by an outside shell or membrane.
26. Q. What is the principal difference between animals and plants?
A. The latter can be nourished by simple mineral or chemical (that is
unorganized) matter, while animal nutrition requires material which has
been organized, or made part of a living being.
27. Q. What do most vegetable cells produce on the outside? A. A membrane
or cell wall, within which the living matter is, as it were, imprisoned.
28. Q. What concentrations of living matter are there within a cell?
A. A concentration called a _nucleus_, and sometimes a still further
concentration within the nucleus, called _nucleolus_, or little nucleus.
29. Q. Of what substance is the cell wall composed? A. A substance
somewhat like starch, called cellulose.