With all its mastery of the laws of heredity, of cytology, and of embryology, it cannot tell why a man is a man, and a dog is a dog.
"The Breath of Life"
John Burroughs
cytology - basic principles must be understood by the teacher but he should not have to spend one whole half year to acquire them.
"Adequate Preparation for the Teacher of Biological Sciences in Secondary Schools"
James Daley McDonald
Though the particular views he advocated have very largely proved incompatible with the observed facts of heredity, yet we must acknowledge that it was chiefly through the stimulus of Weismann's ideas that those advances in cytology were made; and though the doctrine of the continuity of germ-plasm cannot be maintained in the form originally propounded, it is in the main true and illuminating.
"Darwin and Modern Science"
A.C. Seward and Others