Immutable and mutable signs of maple leaves, pond snails?

Maple leaves are opposite, with long petioles and five lobed appearance, resembling the shape of a heart at the base. The inter-blade grooves have a rounded shape, the blades of three to five teeth in the recess, at the end have a thin pointed appearance. Maple flowers are both unisexual and bisexual and have a yellowish green color.

The pond snail shell reaches a diameter of up to 7 centimeters. The shell has a shape with a sharp end in a dark shade. The mouth of the coil in diameter is equal to its height, the final coil has a convex shape.