The minimum age to obtain one's driverâs license should not be raised to 18 because 16-year-olds have a much more focused mind. If you change the minimum driving age to 18, it will be very little different from 16-year-olds because either way they wouldn't have very much driving experience.
Snails make their own shells.They make it with a muscle called the mantle.The mantle then releases liquid.When the liquid hardens it forms the shell.Later in the snails life t â¦ he mantle releases more liquid and the shell becomes bigger.
Once born, predators also attack young snails, because they are slow, they are plentiful and their shell is not hard enough to deter the attack of some predators. When they offspring emerge from their eggs, they immediately need to get calcium into their bodies. They are born with a shell but it is in a fragile state.n brief, mating, gestation period, egg dropping, egg hatching, maturing period and new snails are the main stages of this cycle. The age of sexual maturity is variable from 6 weeks to 5 years, depending on species of snail. Land snails engage in various types of courting rituals to attract mates.