Standby Agreement. An agreement between the issuer of a security and its underwriters stating that the underwriters are responsible for any unsold portion of the issue. That is, the underwriters agree to buy the remainder of a new issue if they are unable to place its entirety with investors.
A sponge has water flow in through the pores. The water contains the food and oxygen the sponge needs. Respiration. A sponge takes in water through its pores and in more advanced forms, with canals that move the water to all throughout the sponge.
Within the body of the sponge, the water may pass through a large cavity (the spongocoel) through a system of canals and chambers, or through a combination of these two. e. Movement of water through the sponge body is accomplished by the beating of the choanocyte flagella.n some sponges this outer tissue layer is syncytial while in others the pinacocytes are all distinctly separated from one another by cell membranes. The innermost tissue layer is composed of cells called choanocytes or collar cells, which have flagella that beat to produce water currents through the sponge body.