The correct answer for the given question above is the second option. Primitive heterotrophs produce energy through chemical fermentation. Chemical fermentation is the same with the process of anaerobic respiration. This involves the breaking down of glucose into energy sources anaerobically.
Answer:
A
Explanation:
Signal loop is composed of negative and positive feedback mechanisms. The positive feedback increases the change in the system while the negative feedback reduces it. The ideal balance between the two feedback loops is called homeostasis.
Try the second one or the third one
Answer:
it is because of the process during gastrulation ..
