Astudent found the following flowchart in a textbook. glyolysis-> krebs cycle-> electron transport chain what is the energy input of the process shown? a) potential energy from chlorophyll b) chemical energy from food molecules c)light energy from the sun d)electrical energy from hydrogen ions

B) Chemical energy from food molecules

Glyolysis, Krebs cycle and Electron transport chain are three important steps of cellular respiration, in which the food we eat is transformed into chemical energy called ATP. This energy is used to perform day to day functions of our life.

The energy input for the whole process of cellular respiration is obtained through the chemicals bonds of glucose, that is obtained from the food we eat. The food macro-molecules like proteins, fats, carbohydrates serve as a fuel for cellular respiration. However, glucose is the most commonly used molecule that is used to analyse the reactions of cellular respiration that lead to the production of ATP is our body.  

During Cellular respiration, glucose is broken down and energy rich molecules like NADH and FADH are produced. These molecules drives the Kreb cycle and ultimately electron transport, which builds a hydrogen proton gradient between the mitochondrial inter-membrane space and the mitochondrial matrix. After the series of three steps energy rich molecules called ATP are produced.

The process is also called oxidative phosphorylation.

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 .. .

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.