Nevermind How does the presence of an iridium layer around 64.5 million years old, support the asteroid impact theory of mass extinction at the end of the Mesozoic Era?

4. discuss additional factors that some planets have that affect their seasons. 5. what fact about other planet’s seasons most surprised you and what did you find the most interesting? why?

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

Based on anatomical similarities, to which modern animal is dr. digger’s creature most closely related?