Answer:
sophisticated irrigation, chemical fertilizers, chemical pesticides
Explanation:
The use of irrigation to provide needed water and the use of natural fertilizers to promote crop growth are farming methods that have been practiced for centuries. More sophisticated irrigation techniques, various chemical pesticides, and modern chemical fertilizers have been developed in the twentieth century.
A possible explanation of a scientific question based on observation
Answer:
mitosis
Explanation:
The cellular process that enables the cells to grow and develop into tissue is mitosis.
Mitosis involves the division of the vegetative cells of the body and is important for the growth and development of organisms as well as in the healing of wounds or the replacement of damaged cells/tissues.
<em>Hence, in treating burns and other types of skin injuries, the cells of the skin are stimulated to divide rapidly by </em><em>mitosis</em><em> so as to replace the damaged cells due to the injury. By doing so, the injured area heals.</em>
♥ They make use of a control group because its something that they can look into, something to compare to. <span />
