How can physical barriers lead to speciation?

Ineed to know why d is the correct answer asap

How can you approximate the number of calories required to keep you in energy balance?

Will mark you as ! keiko’s teacher was discussing the theory of endosymbiosis. she asked keiko to mark the organelles in the diagram that most closely resembled prokaryotes. which organelles should keiko mark? * the first image is the question and the second image is some information to you answer the !