Which of the following researchers are correctly matched with their work?
a. erwin chargaff demonstrated the assimilation of external dna into a cell; mixing a heat-killed pathogenic strain of bacteria with a living nonpathogenic strain can convert some of the living cells into the pathogenic form
b. alfred hershey and martha chase showed that the dna, but not the protein, entered the bacterial cells, and was therefore concluded to be the genetic materiale. james watson and fredrick crick determined the structure of dna, an elegant double-helical model
c. frederick griffith x-ray diffraction of crystallized dna, suggested helical structure and diameter
d. rosalind franklin analysis of the relative base composition of dna

The answer is letter B

Explanation:

B.Alfred Hershey and Martha Chase Showed that the DNA, but not the protein, entered the bacterial cells, and was therefore concluded to be the genetic materialE.James Watson and Fredrick Crick --- Determined the structure of DNA, an elegant double-helical model

Rosalin Franklin - Xray diffraction of crystallized DNA, that is why letter C is incorrect.

Frederic Griffith- Demonstrated the assimilation of external DNA into a cell; mixing a heat-killed pathogenic strain of bacteria with a living nonpathogenic strain can convert some of the living cells into the pathogenic form, that is why letters A and C are incorrect.

which are post-impressionist paintings? check all that apply?

explanation:

post-impressionism is a predominantly french art movement that developed roughly between 1886 and 1905, from the last impressionist exhibition to the birth of fauvism. post-impressionism emerged as a reaction against impressionists' concern for the naturalistic depiction of light and color.

hope this have a good day

silty loam

hope this