
The SciencesApril 1, 1968
Pollen
The tiny grains that carry the male genetic material of plants are closely studied with, among other instruments, the scanning electron microscope. Their baroque architecture raises fundamental questions

Pollen
The tiny grains that carry the male genetic material of plants are closely studied with, among other instruments, the scanning electron microscope. Their baroque architecture raises fundamental questions

The Blue-Green Algae
These primitive plants more closely resemble bacteria than they do other algae. They live in an extraordinary range of environments, and they have both beneficial and harmful effects in human affairs