Give an example of a model used in earth science

Which type of neuroglia is found outside of the brain?

What is thought to have caused the mass extinction at the end of the cretaceous period?

This is the amino acid cysteine. circle the amine group, put a box aroundthe carboxylic acid group and use a different colored pencil/pen to circle the sidechain (r group). h o | ||nh2— c- c-oh | ch2 | sh