<span>Some bacteria in the soil fix nitrogen into useful forms for plants to use them. This conversion of nitrogen helps plants grow. Without the bacteria in the soil a lot of the plants would not be able to grow.</span>
A. Basalt
Basalt is a fine-grained, dark-colored extrusive igneous rock composed mainly of plagioclase and pyroxene. The specimen shown is about two inches (five centimeters) across. Diorite is a coarse-grained, intrusive igneous rock that contains a mixture of feldspar, pyroxene, hornblende, and sometimes quartz.
Cells are simply the basic units from which living things are made of, some are single cell organisms while others could be made of thousands, millions or billions of cells.
Metabolism refers to the sum total of chemical reactions that take place usually, but not by any means always, inside cells e.g they could also occur in the blood plasma or in inter-cellular spaces. They are indispensable for sustaining life.
Genetic modifications tamper with what would be normal genetics. Genetic modifications are upgrades in genetics whereas genetic sexual reproduction happens by normal means.
