For example, new molecules characteristic of the chick appear on the cell surface.

The molecule appears to work by flicking on whole groups of genes during key moments of development.

His molecules reassembled in what appeared to be a jail cell, with rusty iron bars all around him.

This molecule appears to be mainly the result of cell damage.

Another long molecule appeared, an array of lithium atoms arranged along its length like fangs.

There also appeared a molecule called DNA - deoxyribonucleic acid - which had the peculiar property of duplicating itself.

As the molecule appears, it seems that the larger groups are diagonally across the double bond.

As the star's chemical process are about one million times faster than Earth's, self-replicating "molecules" appear shortly and life begins on the star.

Sometimes, two different substances can form a solid mixture in which molecules of both appear in the repeating lattice.

These molecules also appear to have a role in chemoattraction and repulsion.