Plant cells have mitochondria, which use glucose to produce atp. where does the glucose originate?

a. during photosynthesis
b. during fermentation
c. during exocytosis
d. during diffusion

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

When a gasoline engine burns gasoline, what type of chemical reaction is occurring?

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes