Question

in a heated debate in biogeography, the field is divided between dispersalists and vicarianceists. there are those who argue that dispersal is the most crucial determining factor in a species distribution, and those who insist that vicariance (separation due to geographic barriers is. biogeographer isabel sanmartin counts herself among neither. which choice completes the text with the most logical transition? choose 1 answer: a furthermore. b by contrast. c similarly. d that is.

Explanation:

El texto presenta dos posiciones opuestas (dispersalistas y vicariantistas) y luego introduce a Isabel Sanmartín, quien no se identifica con ninguna de ellas. La transición debe mostrar contraste. "By contrast" (Por el contrario) es adecuado para mostrar esta diferencia. "Furthermore" (Además) agrega información, "Similarly" (Asimismo) muestra similitud y "That is" (Es decir) explica, pero no es adecuado aquí.

Answer:

B. By contrast.