Why did Shubin and his colleagues choose to look in the Canadian Arctic for transitional fossils?

Which of the following conclusions can be drawn

Which statements correspond to cellular respiration? co2 diffuses passively into the cell. co2 diffuses passively out of the cell. co2 must be pumped out of the cell. o2 diffuses passively when produced inside the cell. o2 diffuses passively when converted to co2. o2 is pumped in and forces co2 out.

What is the name for a substance formed in a chemical reaction