Good cytological evidence has been adduced in favor of both theories, but further investigation is necessary before any definite conclusion can be arrived at.
The cytological evidence for this appears to be made stronger for animal than for plant cells.
7, from which it will be seen that the cytological details are very complex.
4, D), with peculiar cytological differentiation, may be only sub-species; T.
Cytological details of nuclear behaviour among the lichens are, however, difficult to obtain owing 'to the slow growth of these forms and the often refractory t' nature of the material in the matter of preparation for microscopical ex amination.