Answer:
Producing oxygen
Explanation:
Bacteria actually add to nutrients in soil because they decompose the organic matter such as dead bodies and such. I do not know if bacteria heal sick animals or if they prevent tooth decay rather I am sure they cause both of those.
Therefore, most plausible answer is producing oxygen because there are bacterias like cyanobacteria, or blue-green algae who go through photosynthesis and produce oxygen which is beneficial for all living beings.
Carbon dioxide, water and ATP is produced during cellular respiration
Arthropods have an exoskeleton made of " CHITIN "
Answer:
Scientists use certain letters to represent different types of genes, known as alleles, which come together to create the genotype
