The nervous system is composed of many neurons, which are specialized cells that can communicate through signals.
electrical
light
magnetic
radioactive

The allele for curly hair is incompletely dominant. if a mother is homozygous for curly hair and the father is homozygous for straight hair, what percentage of the offspring will exhibit characteristics of both parents? 25 percent 50 percent 75 percent 100 percent

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?