how lysosomes may be involved in the removal of the interdigital membrane of the developing mammalian fetus.

Lysosomes contain numerous types of enzymes like proteases, lipase, amylase and more in acidic medium that upon fusing with a membrane, will release all the enzymes to stimulate the cells to undergo apoptosis.

Hence the cells that form the interdigital membrane of developing mammalian fetus will die off and acts as a part of the process of removing the unwanted tissues of the developing fetus.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.