Answer:
Plants take in Carbon Dioxide and filter it releasing oxygen.
The basic unit of structure and function is cells
A neuron (also known as nerve cell) is an electrically excitable cell that takes up, processes and transmits information through electrical and chemical signals. It is one of the basic elements of the nervous system. In order that a human being can react to his environment, neurons transport stimuli.
They had to adapt to the heat and to learn to survive long periods without water
