Which two structures are connected via a respiratory membrane?

Photosynthesis converts solar energy into what type of energy?

Ais a group of individuals of the same that exist together in the same place at the same time

You are working in the lab and are working with the same element but with varying isotopes of the element. you are working with c-11, c-13, c-14, and c-15. what is the average atomic mass of this element? (use periodic table) a- 12 b-15 c-14 d-13