Some chemicals increase the mutation rate, physical agents such as radiation also increase the mutation rate. There are viruses that are mutagens as well. Also, the number of mutations that an organism produce can also be phenotypically plastic.
Hope this helps. (This is the definition my bio teacher gave me.)
The following chemical reaction, represents photosynthesis. Photosynthesis does not occur in an earthworm, a whale, or a rabbit. Therefore the answer is a rubber tree plant.
Yes, nucleotide can be used in a sentence. For example, you could say:
DNA is made of Deoxyribonucleotides, while RNA is made of Ribonucleotides, because deoxyribo and ribo refer to deoxyribose, meaning without one oxygen molecule, and ribose, with oxygen molecules.
The next thing for the nurse to do is to write down the normal breath sound in the patient's record. Soft, low pitched sound over the base of the lungs indicate normal breathing. The sound heard will be different if the lungs are infected. Thus, the lungs of the patient been examined is working perfectly; this should be documented in the patient's record.
It would belong to Kingdom Plantae. aka It is a plant!