How many seconds of accidental exposure does it take for a skin burn to occur?

Which is the correct order pf events that occur during conception? a. ovulation, implementación , gfertilization zygote formationb.ovulation fertilization zygote formation implantation c.fertilization ovulation implantation zygote formation d.fertilization zygote formation implantation ovulation

True or false. mucous membranes secrete mucus that traps pathogens.

When is it most common for humans begin to develop a sense of self worth? a. adolescence b. early childhood c. infancy d. late childhood