What happened during the "Cambrian explosion" Mammals began to dominate the Earth

A large explosion occurred on the surface of the Earth, ending the Cambrian era and beginning the next.

An asteroid caused a mass extinction

This is when there was a major increase in the number and diversity of invertebrate species in a short period of time,​

Dominant over the mutant vermilion (bright red) allele. a homozygous wild-type female fly is mated with a vermilion male fly. predict the eye colors of f1 and f2 generations. (assume that the f1 flies are allowed to interbreed to produce the f2 generation.)

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

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?