It was robert hooke if i’m correct
The horse and donkey, though closely related by sharing a common ancestor, are different species. They have different number of chromosomes hence pairing of homologous chromosomes during fusion of gametes becomes complicated. The mule will have an extra chromosome from the horse hence will have abnormalities such as sterility. A Mule is unable to reproduce due to this same phenomenon. Homologous chromosomes are not well paired for meiosis I.
Microbial life is important because this is bacteria. these bacteria's supply health to humans and animals. even though they also supply sickness. also these microbial life forms are the cells in us. its the oxygen in the air, its the gravity. it is everything that defines science except we cant see it. hope it helps, tag me if you need help, and plz choose brainliest