Which of the following did not evolve during the mesozoic era? mammals dinosaurs birds none of the above

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.

The basic types of tissue in the human body are