How do micro organisms contribute to carbon dioxide ratio to oxygen in the soil​

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction. this is an example of speciation.

At which location in earth’s interior does the top density continue to increase as thickness decreases?

What is the next step in muscle contraction after the actin changes shape? (apex)