Does oxygen pass through a cell by active transport or diffusion?

What would be an example of hypothesis for goldfish respiration lab

Drag each label to the correct location on the image. each label can be used more than once. a scientist introduced mutations in a gene sequence isolated from bacteria. study the sequence, and identify the steps where the mutations may affect the formation of proteins. in the sequence, black letters stand for protein coding regions and red letters stand for noncoding regions. protein will not be changed. protein may be changed. attcgtgttc atcgtgttc atcgtattc attcgtattc

The organelle pictured is found in cells of and is theorized to have once been an independent organism.