Answer: B soil is also called the SUBSOIL.
Soil horizon consists of layers of soil that differ physically. It contains 3 or 4 layers or horizon such as O horizon, A horizon, B horizon, C horizon and R horizon. B horizon is also referred as subsoil. It is yellowish to brown in color. It consists of mineral layers such as silicate clay, iron, aluminium, gypsum, silica, humus, etc. The roots of a plant penetrates through the subsoil.
A. external
These types of signals are observed when there is a cut on the body. The epidermal cells lose contact with one another and divide faster until they are in contact once again. After they come into contact, division slows down again.
1. The sun
2. Chemical energy
3. Photosynthesis
4. Store
5. release
6. Cellular respiration?
Last one I'm not 100% sure.
C. The organism would slow down its breathing, so that the heart could recover.
