Sickle cell anemia

What type of mutation error has occurred to cause the disorder shown

The transport tubes for food coming down the plants are called?

Which of these parts of the membrane large moecules pass through it ?

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.