A. John Hogg
B. Ernst Haeckel
C. Margulis and Schwartz
D. Herbert Copeland
Correct Answer: Herbert Copeland ✔
Last Updated: May 12, 2018
A. John Hogg
B. Ernst Haeckel
C. Margulis and Schwartz
D. Herbert Copeland
Correct Answer: Herbert Copeland ✔
Last Updated: May 12, 2018