Could someone help me please

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 are some possible short and long term medical concerns for crew members on longer space exploration trips

How do you date a sample of rock that you suspect as being one of the earliest on earth