Light enters the eye through an opening called the

a.
iris
b.
stirrup
c.
pupil
d.
retina

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons

The function of the excretory system is to control homeostasis and