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.
Platypuses do not have teeth, so the bits of gravel help them to chew their meal. How many eggs does a platypus lay? The platypus will lay one to two eggs each season. The incubation period for the leathery-shelled eggs is quick. After only a month of gestation and 10 days of keeping the new eggs warm, the tiny platypuses emerge from their shells. In a burrow the mother will take care of the young for three to four months, at times leaving them alone for as long as 38 hours while she searches for food.