Water
through evaporation that is one way
For living things to carry out their processes, energy must enter the earth system constantly.
Evaporation.
This process is called evaporation.
Living cells maintain homoeostasis by controlling materials that enter and leave the cell. This is made possible through the permeable cell membrane which is selective on the substances that pass through it.
I presume you are referring to a part of an organ where such things as blood vessels and nerves enter. The answer is no, because many living things do not have the same circulatory and nervous systems that we do. If you mean the attachment scar on a seed, then again no, as most living things are not seeds.
The formation of the ozone hole is affecting the living things. The hole in ozone is causing UV to enter and affecting the humans.
evaporation
Evaporation.
how does energy enter this living world
The cell membrane. It also allows certain things to enter and exit.
evaporation