Is perpendicular to line segment hy if the length of EF is a units, then the length is units?

The body is protected against harmful flu viruses by

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

Do plants make food in their stems flowers roots or leaves?