How do you determine the amount of electrons and protons?

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

The same agricultural practices are used in every country of the world. select the best answer from the choices provided t f

In a cladogram, what occurs at a node? a derived trait appears. evolution is stopped. an ancestor dies. the cladogram ends. aa as s as ss what are the chances that their offspring will have sickle cell anemia? 0% 25% 50% 100%