How often does oxygen cycle through the atmosphere?

In fruit flies, gray bodies (g) are dominant over black bodies (g), and brown pigments (n) are dominant over yellow pigments (n). each individual possesses two alleles for each trait. if a fly that is homozygous dominant for both traits is crossed with a fly that is homozygous recessive for both traits, what is the predicted genotype of the offspring.

How does friction with the atmosphere affect the speed of an artificial satellite

Which process in respiration happens first? a)pyruvate processing b)electron transport chain c)krebs cycle d)glycolysis