When a poison such as cyanide blocks the electron transport chain, glycolysis and the citric acid cycle also eventually stop working. Which of the following is the best explanation for this?a) The uptake of oxygen stops because electron transport was inhibited b) They run out of ADP c) A high level of NADH is present in the cell d) Electrons are no longer available from the electron transport chain to power glycolysis and the citric acid cycle e) NAD⁺ and FAD are not available for glycolysis and the citric acid cycle to continue

NAD⁺ and FAD are not available for glycolysis and the citric acid cycle to continue.

The glycolysis, citric acid cycle and the Electron transport chain all together makes up the aerobic respiration. The glycolysis and Kreb's Cycle produces a lot of reduced hydrogen ion transporters like NADH and FADH which are then transported to the inner Mitochondrial membrane which are then oxidised back to the NAD and FAD forms by accepting their hydrogens by either complex 1 or complex 2. Now the cyanide blocks the electron transport chain which means there's noone to accept those hydrogens. So there will be enormous NADH and FADH in cell, but there will be reduced or nil NAD and FAD. This will lead to disappearance of hydrogen ion acceptors which are essential to carry out Kreb's Cycle and glycolysis. So this will lead to stoppage of them.

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .

answer; the correct answer is (beta)