What did rosalind franklin contribute to the discovery of the structure of dna?

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

Which group of protists would be most likely to have cilia as adults and why? (1 point)the sporozoan protists would since they have to spread their spores around. the heterotrophic protists would since they use them to gather food. the parasitic protists would since they need to find other organisms to attack. the autotrophic protists would since they must move to find light.

Forensic scientists think they know the identity of a skeleton. what rule should they use to select a relative whose dna could be used to try to confirm the identity?