. Lectures on the evolution of plants. Botany; Plants. EVOLUTION OF PLANTS rmals the so-called " Monera," which were formerly supposed to be composed of structureless protoplasm, are now known to possess a nucleus, so that we cannot assert positively that any known forms consist of un- differentiated protoplasm as was once supposed to be the case. As a rule the protoplasm is segregated in masses of definite form, usu- ally furnished with a more or less evident envelope and provided with a special structure, the nucleus. These nucleated masses of protoplasm are generally called cells,
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. Lectures on the evolution of plants. Botany; Plants. EVOLUTION OF PLANTS rmals the so-called " Monera," which were formerly supposed to be composed of structureless protoplasm, are now known to possess a nucleus, so that we cannot assert positively that any known forms consist of un- differentiated protoplasm as was once supposed to be the case. As a rule the protoplasm is segregated in masses of definite form, usu- ally furnished with a more or less evident envelope and provided with a special structure, the nucleus. These nucleated masses of protoplasm are generally called cells,