UPVC windows are cleaned with water and vinegar mixed in a sprayer. Jupiterimages/BananaStock/Getty Images. Unplasticized polyvinyl choloride, or UPVC, is a rigid and chemically resistant plastic used often in window and door frames.
Clutch size: 35-50 eggs. In April or May, the female crocodile will build a nest of loose dirt in a mound by the water's edge and lay her eggs. She buries the eggs and fiercely guards her nest. When the eggs hatch in July or early August, the female helps carry her young to the water.
Best Answer: Platypuses lay small, leathery eggs similar to those of reptiles, which are slightly rounder than bird eggs. Females usually lay two eggs at a time, but sometimes they lay one egg or three, which are about 11mm in diameter (0.4 inches). The incubation period is separated into three parts. In the first, the embryo has no functional organs and relies on the yolk sac for respiration.