How would a decaying tree be classified

The answer is non-living and biotic. Non-living because the processes that characterize a living organism (such as respiration, growth, response to stimuli, nutrition, and etcetera ) cease in the tree. Biotic because the tree is still composed of molecules associated with life such as proteins, carbohydrates, cellulose, lignin, and etcetera, even though the tree is dead.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.