Answer: Facultative anaerobe
Explanation: Facultative anaerobes are organisms that can live with or without oxygen supply. this organism processes carbohydrates and proteins as oxygen is taken away from its enviroment in order to derive oxygen.
The correct answer to your question is D, mRNA is synthesised from a strand of DNA. The reason being because transcription makes RNA from DNA.
The tadpole contains gills but doesn't have legs nor lungs.
however the adult frog contains the opposite. It has both lungs and legs but doesn't have gills. This is due to tadpole leaves in the water and the frog leaves on both land and sometimes in the water.
The second membrane protects e.coli (Gram-negative bacteria) against a harsh environment.
The outer membrane indirectly helps stabilize the inner membrane as peptidoglycan layer in Gram-negative bacteria is relatively thin than gram positive bacteria ( they have multilayer pepdtidoglycan )