Which is an example of an internal stimulus? a. an increase in the amount of water available to a plant b. a decrease in oxygen levels in the blood during exercise c. a sudden change of air temperature d. an artificial light that attracts insects

a decrease in oxygen levels in the blood during exercise

The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.

Oh dog