<span>Anton van Leeuwenhoek, </span>who designed and built the first microscope, also discovered microbes such as protozoa and bacteria from a drop of pond water. He also viewed bacteria taken from his teeth scrapings. He was also the first to discovered blood cells and human sperm cells.
No, not gastric ulcers. Ulcers, yes. But gastric ulcers are specific to the digestive system, hence the word gastric! :)
Answer:
Genotype of Parent 1: Aa
Genotype of Parent 2: aa
Probability of offspring having freckles: 50%
Explanation:
The genotypes of the parents are actually given in the Punnett Square. And, since out of 4 options 2 are all freckles, probability is 50%.
Answer:
c
Explanation:
because sun is far from us and ozone layer blocks many rays
