Which is an example of an endothermic reaction? a. combustion of fuels b. burning of wood c. cellular respiration d. photosynthesis e. nuclear explosion

D. photosynthesis

Explanation:

Exothermic processes are those processes in which heat is released and endothermic processes are those processes in which heat is absorbed.

A. Combustion of fuels is an oxidation of hydrocarbons where energy is released.

B. Burning of wood is oxidation of carbon in which energy is released.

C. Cellular respiration is oxidation of food to release energy as ATP.

D. Photosynthesis is process of generation of food by green plants by use of sunlight as energy source.

E. Nuclear explosion involves nuclear reactions in which energy is released.

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

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