If plants need oxygen for cellular respiration, then why do they release oxygen into the atmosphere?

Most scientific questions are based on opinions. hypotheses. observations. experimental data.

Need an answer asap 45 points and brainlest to the first person to answer why do scientific theories, such as biological and chemical evolution, represent the strongest explanation of the changes observed in the fossil record. must be in sentence form how can scientific theories on evolution and the fossil record change over time? must be in sentence form

Genetic disorders can result when sister chromatids fail to seperate properly. during what phase is this problem most likely to occur?