How does evolution explain both the unity and diversity of life?

Biological evolution explains both the unity and the diversity of species and provides a unifying principle for the history and diversity of life on Earth. Natural selection can act more rapidly after sudden changes in conditions, which can lead to the extinction of species.

Explanation:

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.