Explain how the discoveries by Rosalind Franklin helped Watson and Crick build an accurate model of DNA.

Hello there,before the 1940s, scientists believed that proteins, rather than dna, were the carriers of genetic material in the cell. why?   answer:   proteins are present within the nucleus

Match these things with what give the other option

Ididnt have which of the following as an option. but a negative feedback loops occur in your body through its own internal controller for maintaining temperature ph, hormone levels, blood sugar and other internal variable levels of homeostasis, which is the optimal internal state at which your body operates