Higher pressure in glomerular capillaries than in the surrounding Bowman's capsule.
Explanation:
The renal corpuscle is composed of the capillary glomerulus and the Bowman's capsule that covers it, there is a space inside the capsule, Bowman's space, where the filtered liquid from the glomerulus passes. The glomerular pressure must be higher than in the surrounding Bowman's capsule, so in that way it forces the filtration and tends to expel fluid from the glomeruli, allowing the passage of water, small molecules of solute and ions.
This process is called Cloning. Cloning is the process of producing genetically identical copy of an organism or a cell, which may occur naturally or created in the lab. Naturally it may occur through processes such as asexual reproduction in organisms such as bacteria; where offsprings that are genetically identical to the parent are created. In the above case, it is done artificially to generate identical plants using growth hormones.