300 BC by Greek philosophers
Answer:
pH
Explanation:
Substances can act as a buffer to resist changes in pH when something more acidic or basic is added
4. <u>h</u> called the crossover.
5. <u>a</u> when fertilization occurs, it now turns back into 2n.
Hope this helps!
Answer: He supported polygeny through his work measuring human skull volumes. He measured modern and ancient skulls and concluded that the human race (or species) could be ranked on a scale of intelligence. He concluded that the ancient Egyptians were not African, but were Caucasian.