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.
Meteor impacts changed Earth's climates
Butterfly's wings the left and right are reflections of each other. However, each butterfly is unique like a Zebra.
Answer:
cilium: a short microscopic hairlike vibrating structure found in large numbers on the surface of certain cells, either causing currents in the surrounding fluid, or, in some protozoans and other small organisms, providing propulsion
Explanation:
a cilia is the plural form of cilium
<span>They are not identical because they use different parts of their genetic instructions. </span>