Name one animal cell and one plant cell that has no nucleus when fully developed. for each cell named, state its function

In animal cells, red blood cells do not have a nucleus when they are fully developed. The function of the red blood cells is to supply oxygen from the heart to every part of the body and carry carbon dioxide from the body parts backs to the lungs.

A plant cell that does not have a nucleus is the sieve cells which make the sieve tubes. The function of these cells is to transport carbohydrates in different parts of the plant.

60 minutes before sexual intercourse. There are different types of spermicides which come in different forms such as gel, foam, suppositories and films. All these forms have one thing in common, they contain a chemical referred to as nonoxynol-9, an active component that kills the sperms. The reason why spermicide must be applied 60 before intercourse to give it enough time to spread and dissolve. Again most of these spermicide are effective for only one hour and if they stays in vagina for more than one they become ineffective. it is also advisable that after sexual intercourse, another round of spermicide is applied.