Why was the evolution of cyanobacteria such a significant event in Earth's history?

What process allows for the development of haploid sex cells? mitosis meiosis fertilization pollination

Would really appreciate it, i have an idea but not completely sure

The observations of hooke and van leeuwenhoek documenting the existence of microscopic cells formed the basis of what important theory? a. the cell theory stating that all living things are composed of cellsb. the theory of spontaneous generation, which held that life forms could arise spontaneouslyc. the theory of chemotherapy, or use of antimicrobials to destroy pathogenic organismsd. the germ theory of disease and causative agents