Breathing is required for cellular respiration

Which would best keep the oxygen cycle stable? a. cutting down jungles to create farmland b. eliminating parks in large cities c. dumping toxic chemicals into the ocean d. reducing the amount of deforestation d. reducing the amount of deforestation

Based on the law of dominance, we would expect percent of the offspring from this cross to have large teeth.

What is the farthest destination to date for a human spaceflight mission?