<span>In grafting, the plant with desired root system is called the <u>rootstock</u>, and the portion of the plant with the buds is called the <u>scion</u>.
The grafting is a horticultural technique in which parts from two or more plants are joined together to grow as a one single plant. Rootstock is the plant selected for its roots because it can provide different properties, such as fruit size, or because it is resistant to drought or diseases. Scion is the plant selected for its leaves, flowers, fruits or stems.
Centrioles are only found in animal cells and they help during cell division. They organize the spindle fibers that help elongate the cell and separate the chromosomes.
A bad line measurement (aka control) is set up so that you can compare your results from each test against so it gives the values a meaning as it shows how they differ from eachother