Aclade is a fancy word for any group phylogenetic tree that includes an ancestor and all of its descendants. a simplified dinosaur tree is to the right.

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Identify the structure in organisms that do not have kidneys that is adapted to regulate water balance

What are 3 reasons that natural selection occurs