Transcription happens first.
Answer:
The answer is A I believe
Explanation:
Answer:
The atmosphere and Earth's interior are layered by density. Gravity pulls more strongly on denser materials so denser materials are at the center of things. Earth's core, at its center, is denser than its crust. The lowest layer of the atmosphere is denser than the upper layer.
Ans.
Mucus is an aqueous, slippery secretion produced by cells of mucous membranes and mucous glands. The entire respiratory system is lined with mucous membranes that continuously secrete mucus.
The mucus plays role in trapping the small particles, such as smoke, microbes, and pollen that enter to respiratory tract during inhalation. These trapped particles are then moved out of the nose with the help of cilia present in mucous membrane.
Thus, the correct answer is option A). 'trap particles from the air before they reach lung.'
The process of cellular respiration for a particular cell, depending on its efficiency can produce up to B. 38 ATP molecules, most of which come from chemiosmosis and the electron transport chain.
