Answer:
Aerobic respiration occurs in the presence of oxygen.
C6H12O6(glucose) –> 2CH3CH2OH(ethanol) +2CO( carbon dioxide) + energy
Anaerobic respiration get energy by breaking down glucose in the complete absence of oxygen.
C6H12O6(glucose) –> 2CH3CH(OH)COOH (Lactic acid) + energy.
Cetaceans are evolved from mammals ! Cetaceans are thought to have evolved during the Eocene or earlier, sharing a closest common ancestor with hippopotamuses.
They are descendents of Mammals !! And that four legged is hippo !!
So I think and sure of Mammals ....To be the answer !!
B. Stomata. These are the holes in leaves that gases pass through. So, while leaves have something to do with it, petals do not, so D is close but wrong answer.
Mitosis is the part of the cell cycle where cell division makes 2 daughter cells that has the same amount and kind of chromosomes as the parent nucleus.