The answer is D, photosynthesis and respiration.
—Evidence—
Oxygen is a byproduct of photosynthesis and, correspondingly, carbon dioxide the byproduct of respiration.
Oxygen gives our cells the ability to break down food in order to get the energy we need to survive. Although other animals may use different organs to breathe with, they all get oxygen into their bodies through respiration.
Dissolved O2 conc. in flask with algae will be higher since photosynthesis produces O2.
Answer:
5-10 days to get to the waking faze
Answer:
"Manganese is a grey-white, hard and very brittle metal.
It tarnished on exposure to air and oxidized to manganese when heated."
Credits to: Yahoo
