Sexual reproduction allows the organisms to combine DNA and produce offspring that may have better survival traits than either one of the parents. Even if an organism has both male and female organs, it is better for future offspring to combine these traits and try to produce a superior organism instead of just copying the DNA that is already there.
Snails. Search: HERMAPHRODITE
Snails cannot change colors.
well, snails are a in the family of Hermaphrodites - which means they have both male and female sex organs. So that means that a snail can have random sex to fertilise both the snails eggs to produce baby snails.
To determine the sex of a snail, you can look for physical differences in their reproductive organs. Male snails typically have a penis, while female snails have a reproductive opening called a gonopore. Additionally, some species of snails may have visible differences in their shell or body shape that can indicate their sex.
Snails do not change their shells ever. They keep their shell up to the day they die.
Snails are hemaphrodites(they are boys and girls) which means they have a set of male and female sex organs.That means that they can get pregnant by themselfs or other snails.
Snails are upon the few species that can change their sex upon will, dependant on the gender of their mate, the genitaliar region of the snailwill grow or recessin the presence of a compatible partnter.
apple snails are single sex snails Incorrect. Many snails are hermaphrodites but apple snails are not. They are indeed male and female apple snails. Go to http://applesnail.net/ for more information and how to sex them.
chemical change
They could be fighting, because some snails eat other snails. On the other hand, they could be having sex. When snails have sex, both of them "get pregnant" because a snail has both sets of sex organs. They shoot each other with a "dart" that causes the sperm to remain alive in the other's body until it can fertilize the egg.
they never change their shell and they can be eaten.
It is neither. Snails are hermaphroditic, meaning that they have both sets of sex organs.