Arrange the layers and faults from oldest to youngest.

D,C,B,A,F and E.

Withering is a process in which large rocks are broken down into small particles with the affect of agents like wind and water. These particles are settled either on the same surface or displaced to other locations due to erosion. The older withered particles and heavier deposits being denser in weight settle at the bottom allows more layers to deposit over them. The newly withered and lighter particles remain at the top. These layers gives structure to a soil.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.